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  • 1955-1959  (3,653)
  • 1890-1899  (8,112)
  • Inorganic Chemistry  (11,178)
  • Chemical Engineering  (583)
  • Agrobacterium  (4)
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Material
Years
Year
Keywords
  • 101
    Electronic Resource
    Electronic Resource
    Thermal conductivity of diatomic gases: Liquid and gaseous states (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 367-372 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: After an extensive literature survey the experimental thermal-conductivity data for twelve diatomic gases were utilized to produce an accurate and expedient means of predicting values over extensive ranges of temperature and pressure. Plotting values of k* against TR on logarithmic coordinates produced similarities pointing to the existence of corresponding states behavior for this family of substances with the exception of hydrogen. Because hydrogen cannot be included in a correlation generalized for the diatomic gases, it has been eliminated from this study. Based on atmospheric pressure data, ratios of k*/k*Tc produced a unique relationship with reduced temperature. To include the effect of pressure, residual thermal conductivities were correlated with density for nitrogen and oxygen, the only substances for which high-pressure data exist. These relationships enabled the determination of the thermal conductivity at the critical point. When the value kc = 8.55 × 10-5 cal./sec. cm. °K. for nitrogen was used, au extensive reduced thermal-conductivity correlation was constructed against reduced temperature for parameters of constant reduced pressure. This chart, extending to reduced pressures of 100 and to reduced temperatures of 85, is recommended for the diatomic gases in their gaseous and liquid states.The developed correlation reproduces experimental nitrogen data to within 1.39%. For the other diatomic gases experimental agreement extends from 1.00 to 3.20%. Such agreement indicates that this correlation is more reliable for the diatomic gases than are other generalized plots presented in the literature.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050322
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  • 102
    Electronic Resource
    Electronic Resource
    Studies of the cation exchange system Fe+++-H+: II. Rate studies in concentrated solutions (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 394-396 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Fixed-bed kinetic studies were made for Fe+++  -  H+ exchange, with perchlorate as the anion, covering concentrations from 0.5 N to 2.0 N in total cation, flow rates of 5 ml./min. sq. cm. to 45 ml./min. sq. cm. bed depth of 25 to 60 cm., and average resin particle diameters of 0.28 and 0.56 mm. The results are correlated on the assumption of internal diffusion as the rate-controlling step and an essentially irreversible equilibrium.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050327
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  • 103
    Electronic Resource
    Electronic Resource
    Fluid dynamics and diffusion calculations for laminar liquid jets (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 397-402 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: In connection with a study of the mechanism of gas absorption the problem arose of predicting absorption rates into laminar liquid jets. A solution to the problem is presented in this paper, which provides an example of the application of fluid dynamics to the analysis of mass transfer in a complex flow system.The water jets considered here issued from circular nozzles of about 1.5-mm diameter, flowed intact downward through an atmosphere of solute gas at average velocities of from 75 to 550 cm./sec. over distances of 1 to 15 cm., and were collected in a receiver slightly larger in diameter than the nozzles. Equations describing the liquid flow near the jet surface are deduced from measurements of jet diameter and analogy to related flow situations. When one uses these equations, absorption rates are predicted from unsteady state diffusion theory with the assumption of interfacial equilibrium. The predicted rates for carbon dioxide at 25°C are in close agreement with experimental determinations over the observed range of contact time of the liquid with gas, namely 0.003 to 0.04 sec.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050328
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  • 104
    Electronic Resource
    Electronic Resource
    Thermodynamic consistency test for multicomponent solutions (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 7S 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050334
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  • 105
    Electronic Resource
    Electronic Resource
    Automatic control of fluid flow (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 524-532 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: This paper illustrates the use of analytical methods for the design of a flow-control system. Linearized equations are derived and a complete analysis is made of the control of the system. The effect of controller modes and process time constants is investigated. The calculations show that there is an optimum value of the process time constant for optimum response.
    Additional Material: 17 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050422
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  • 106
    Electronic Resource
    Electronic Resource
    Some properties of polar substances: A survey (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 436-439 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The current understanding of the macroscopic (bulk) properties of polar substances in terms of molecular theory, or the correlation of them in terms of corresponding-states principles is summarized.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050408
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  • 107
    Electronic Resource
    Electronic Resource
    Performance of a reciprocating-plate extraction column (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 446-452 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: An open type of reciprocating-plate extraction column was developed, and it is proposed that the scaling up of such a column should be straightforward; that is, the height of an equivalent theoretical stage (H.E.T.S.) and the throughput per unit area should be independent of the diameter of the column.Plates having 5/8-in.-diameter holes and 62.8% free space were selected to minimize the resistance to countercurrent flow in the column. With this design low H.E.T.S. values were achieved at throughputs much higher than those reported for other columns. Thus for two systems the present column was shown to require the lowest volume of column to accomplish a given extraction job. Data were obtained in a 3-in.-diameter column on two systems, methyl isobutyl ketone-acetic acid-water and o-xylene-acetic acid-water. Throughputs studied on the first system ranged from 547 to 1,837 gal./hr./sq. ft., and the corresponding minimum H.E.T.S. values achieved were 4.3 and 7.5 in. respectively. For the second system minimum H.E.T.S. values of 7.7 and 9.1 in. were attained at throughputs of 424 and 804 gal./hr./sq. ft. respectively.Extraction column design procedures are discussed. The fabrication of the reciprocating-plate column is relatively simple, and this should encourage its use first in pilot-scale sizes and ultimately in large-scale columns.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050410
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  • 108
    Electronic Resource
    Electronic Resource
    An experimental study of diffusion-controlled reactions in a laminar boundary layer (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 483-485 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A brief review is presented of the theoretical solution obtained by the authors to the problem of a rapid second-order reaction in the incompressible laminar boundary layer on a flat plate. An experimental system is described for investigating reactions of this type, specifically the dissolution of plates and cylinders of benzoic and cinnamic acids in aqueous solutions of sodium and potassium hydroxide. Experimental data are reported in terms of a reaction factor, that is the ratio of the transfer rate with reaction to that in the absence of reaction. The reaction factor is independent of position. The theory closely predicts the reaction factor for cylinders as well as for flat plates. Data obtained by other investigators for packed beds can also be correlated although less successfully.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050415
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  • 109
    Electronic Resource
    Electronic Resource
    Transfer resistance and fluid mechanics (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 502-505 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Pure liquids were evaporated in a wetted-wall column into flowing streams of air to investigate the thickness and transfer resistance of gas films.It was found necessary to express Reynolds number relative to the liquid surface to correlate transfer with gas flow.Laminar and buffer layers in the gas phase were calculated from fluid-flow principles and compared to the effective film thickness calculated from mass transfer and molecular diffusivity. Good agreement was obtained, indicating applicability of fluid mechanics to mass transfer problems.Eddy diffusivity was indicated to have a negligible effect upon the total resistance to transfer. Consequently it might be concluded that in packed towers where distances in the turbulent phase are shorter transfer between phases depends almost entirely upon molecular diffusivity.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050418
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  • 110
    Electronic Resource
    Electronic Resource
    Reaction rates in the synthesis of ammonia (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 539-544 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A study has been made of the reaction rates of mixtures of hydrogen and nitrogen to form ammonia over a doubly promoted iron catalyst at 400° and 450°C. and at pressures up to 1,000 atm. In this work particular care has been taken to obtain data representing the true kinetics of the reaction. The reactor used was essentially isothermal, and the effects of diffusion have been reduced to a minimum. The results have been correlated by the use of the mechanism proposed by Temkin and Pyschev (19) with moderate success.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050424
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  • 111
    Electronic Resource
    Electronic Resource
    Masthead (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959) 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050101
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  • 112
    Electronic Resource
    Electronic Resource
    Equilibria in the hydration of ethylene at elevated pressures and temperatures (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 10-16 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Values of equilibrium composition for the hydration of ethylene to form ethanol have been calculated for a series of elevated pressures and temperatures by using equilibrium data available from previous low-pressure studies. To obtain satisfactory agreement between these values and those measured experimentally, it is essential (1) to take into account the formation of ethyl ether and (2) to use available vapor-liquid equilibrium data for the binary ethanol-water system at elevated temperatures, instead of the standard “mixture rules” often employed.Thermochemical data and low-pressure equilibrium data for both the ethylene hydration and ether formation reactions are critically reviewed. Experimentally measured values for the equilibrium concentrations of ethanol and ether in the liquid phase at 221°C. and 273 atm., with dilute sulfuric acid used as catalyst in a lined rocking-bomb reactor, are presented.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050104
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  • 113
    Electronic Resource
    Electronic Resource
    Compressibility of n-hexane (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 29-30 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Although a considerable amount of work has been done on the compressibility of n-hexane, it has been impossible until now to compare or evaluate the work of the various investigators. There has also been a serious lack of information in the region above the critical temperature. It is the purpose of this work to make an extensive study of temperatures of 240° to 300°C. and of pressures up to 225 atm. in order to provide the lacking information and to overlap with the work of other investigators so that a proper evaluation of their work may be made.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050108
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  • 114
    Electronic Resource
    Electronic Resource
    Mass transfer from a solid sphere to water in highly turbulent flow (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 178-181 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Mass transfer coefficients from 1/2-in. spheres of benzoic and cinnamic acids and 2-napthol to water were measured in the high Reynolds number region of 600 to 140,000. Previous data for liquids extended only to a Reynolds number of 11,000. Three separate and approximately parallel lines of JD vs. Reynolds number were found for the different solutes, and the shape of the curves was found to be similar to the total-drag-coefficient correlation for spheres.Experiments with benzoic acid and 2-napthol showed an effect of driving force and hence flux on the JD values. Mass transfer did occur in saturated solutions having zero driving force. When one subtracted the amount of mass transfer at zero driving force from the values at other driving forces, the corrected JD values at different driving forces were the same for a given solute. Possible explanations may be the effect of extreme turbulence on crystallization or physical attrition.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050212
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  • 115
    Electronic Resource
    Electronic Resource
    The molecular structure of liquids (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 212-222 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050217
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  • 116
    Electronic Resource
    Electronic Resource
    Treatment of thermodynamic data for homogeneous binary systems (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 209-212 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: This paper describes general methods for the treatment of binary data which are both precise and convenient. In particular a new and accurate graphical method of determining partial molal quantities is presented.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050216
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  • 117
    Electronic Resource
    Electronic Resource
    The dynamics of heat removal from a continuous agitated-tank reactor (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 240-244 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The present investigation is concerned with the dynamic characteristics of a 12-in. diameter continuous agitated-tank reactor vessel. Response of the vessel effiuent temperature to a change in coolant flow rate through an internal cooling surface is the subject of theoretical and experimental study. Experimental data were obtained through the use of frequency and transient response techniques. Studies were made for the passage of vessel-charge fluids with widely differing physical properties. Also data were taken for various conditions of fluid turbulence both inside and outside the internal heat transfer coils. Experimental and theoretical results are graphically compared. Recommendations are presented for the development of theoretical dynamic relationships.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050221
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  • 118
    Electronic Resource
    Electronic Resource
    Flow characteristics in horizontal fluidized solids transport (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 263-267 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The flow characteristics of dense solid-gas mixtures transported through horizontal pipes were studied with glass beads and coal powders of various sizes (0.0028 to 0.0297 in.) in 1/2-, 3/4- and 1-in. glass pipes and a 1/4-in. steel pipe. Fluidized-bed feeders were utilized, thus permitting solid-gas ratios considerably higher (range 80 to 750) than those possible with conventional pneumatic transport. When such high solid-gas ratios are used, the flow of mixtures in transport lines is characterized by a large amount of slippage between gas and solids. The flow pattern is dicussed on the basis of visual observation through glass pipes.A simple and interesting velocity relationship was noted, namely that the average gas velocity is about twice as large as the average solid-particle velocity. The solid-particle velocities and solid loadings in the pipe line were found to be primary factors affecting pressure drops, and the particle sizes and shapes, on the other hand, exerted a very slight effect on the pressure drops. This is apparently due to the fact that the solids move predominantly in the bottom of the pipes as agglomerated masses rather than as individually suspended particles. A pressure-drop correlation for the dense solid-gas mixtures is proposed, and applications and limitations of the correlation are shown.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050225
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  • 119
    Electronic Resource
    Electronic Resource
    Diffusion in a pore of irregular cross section - a simplified treatment (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 270-271 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050229
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  • 120
    Electronic Resource
    Electronic Resource
    Modern mathematics for the engineer, E. F. Beckenbach, et al, University of California Engineering Extension Series, Mcgraw-Hill Book Company, Inc., New York (1958). 514 pages. $7.50. (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 274 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050233
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  • 121
    Electronic Resource
    Electronic Resource
    An introduction to chemical engineering, C. E. Littlejohn and G. F. Meenaghan Reinhold Publishing Corporation, New York (1959). 271 pages. $6.50. (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 276-276 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050303
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  • 122
    Electronic Resource
    Electronic Resource
    Performance of packed columns: V. Effect of solute concentration on gas-phase mass transfer rates (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 290-294 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: In a determination of the effect of solute concentration on gas-phase mass transfer rates carbon tetrachloride was vaporized at three different concentration levels in a short 4.0-in.-diameter column packed with 0.5-in. Raschig rings.The experimental data indicate that previous mass transfer correlations should be modified to include a term (PBM/PT)2/3 and that the Schmidt number should be evaluated at average film conditions.The correlation found is suitable for predicting gas-phase mass transfer coefficients which can be combined with effective interfacial areas reported previously to obtain volumetric mass transfer coefficients for any gas-liquid-solute system.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050308
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  • 123
    Electronic Resource
    Electronic Resource
    Masthead (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959) 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050301
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  • 124
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    Recent Advances in the Engineering Sciences, Proceedings of Conference on Science and Technology for Deans of Engineering, Purdue University, September, 1957, McGraw-Hill Book Company, Inc., New York (1958). 257 pages. $4.75. (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 10S 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050305
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  • 125
    Electronic Resource
    Electronic Resource
    The phase behavior and solubility relations of the benzene-water system (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 285-289 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: In order to contribute to knowledge of the nature of the phase behavior of partially miscible liquid systems, a study of the benzene-water system was undertaken. The pressures at liquid- and vapor-phase boundaries of fifteen mixtures of benzene and water were determined within the temperature range of 200 to 357°C. Along with a complete numerical tabulation, these data are presented graphically as pressure-temperature, pressure-composition, and temperature-composition phase diagrams to show the nature of the boundaries.Up to the three-phase critical end point, the benzene-water system develops in a manner usually ascribed to a partially miscible system in which the vapor compositin at a point of univariance lies intermediate to the two liquid compositions. The three-phase critical end point occurs at 1,364 1b./sq. in. abs. and 268.3°C., and the composition of the critical phase is 25.8 weight % water, with the remaining liquid phase 92.8 weight % water.The pressure, temperature, and composition of the critical solution end point are deduced as 2,300 1b./sq. in. abs., 306.4°C., and 59 weight % water, respectively. At temperatures between these two critical points the phase behavior is likened to that of a dense gas or fluid dissolved in a liquid. Definite limiting values of temperature and pressure are assignable to this behavior by the extension of the three-phase curve up to the critical solution end point. This extended curve is not a phase boundary, but the temperature and pressure at a given point on the curve represents in a mixture of fixed composition the limit of mutual solubility of the benzene-rich fluid phase and the water-rich phase. At a temperature above or a pressure below the given point the liquid phase begins to vaporize.Above the critical solution end point the vapor-liquid phase boundaries are like those of a normal binary mixture.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050307
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  • 126
    Electronic Resource
    Electronic Resource
    Theory of solvent extraction of phosphoric and hydrochloric acids (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 379-384 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Mixtures of hydrochloric and phosphoric acids were extracted from aqueous solution by organic solvents in a study to advance the theories of solvent extraction.Four solvents, t-amyl alcohol, n-butanol, cyclohexanol, and 2-hydroxyethyl, n-hexyl ether, were found to give high distribution coefficients of 0.1 to 0.5 for both acids. In studies using the ether type of solvent an increase of the pH of the aqueous phase from 0 to 10 reduced the distribution ratio of phosphoric acid by a factor of 1,100.The substitution of hydriodic acid for hydrochloric caused a 42% increase in the K of phosphoric acid, which could indicate the importance of internal pressure of the additive in extraction. Measurements of activity coefficients of the hydrochloric acid in aqueous solution showed only a 1% increase in its activity coefficient with addition of large amounts of phosphoric acid. This could not be sufficient to cause up to a 40% increase in the distribution coefficient of the hydrochloric acid with the addition of the phosphoric acid.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050324
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    The uselessness of raffinate reflux (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 406-406 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050330
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  • 128
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    The uselessness of total reboiling (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 407-407 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050331
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  • 129
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    Vapor-liquid equilibria and heat of mixing: n-octane-ethylbenzene-cellosolve system (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 8S 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050335
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  • 130
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    Plant design and econmics for chemical engineers, Max S. Peters, McGraw-Hill Back Company, Inc., New York (9158). 511 pages. 511.00. (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 412-563 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050403
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  • 131
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    Transistion from laminar to turbulent flow in pipes (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 433-435 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: In pipeline design, for which one needs a means of ascertaining whether the flow will be laminar or turbulent, the Reynolds number is the criterion for Newtonian fluids. The principal purpose of this study was to formulate a more general criterion to characterize the flow regime and to test this form in application to non-Newtonian fluids.Intuitive physical arguments suggested the use of a local stability parameter which is a function of the ratio of input energy to energy dissipation for an element of fluid. If the parameter is applied to a Newtonian fluid in laminar pipe flow, one finds that it has a maximum value of 0.385 times the critical Reynolds number, or 808. As the criterion is presumed to be general, it is inferred that the value of 808 defines the boundary between stable laminar and stable turbulent pipe flow for all fluids. The inference has been varified for several pseudoplastic fluids.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050407
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  • 132
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    Kinetics of the hydrogenation of ethylene: (On a nickel catalyst) (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 453-457 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A differential type of flow reactor, 0.25-in. I.D., was used to study the kinetics of the hydrogenation of ethylene on an alumina-supported nickel catalyst. This is apparently the first investigation made above atmospheric pressures. Data were obtained from 14.7 to 70 1b./sq. in. abs. and feed compositions from 40 to 90 mole % hydrogen. Measurements at temperatures from 30° to 80°C. indicated an apparent activation energy of 11,600 cal./g.-mole.It was found that the activity of the catalytic surface was reduced by exposure to ethylene, or mixtures containing an excess of ethylene, owing to the formation of acetylene residues. Pretreatment of the catalyst at temperatures of 170°C. with mixtures of ethylene and hydrogen stabilized the catalyst so that reliable rate data could be obtained.The rate measurements at 70°C. were correlated by an equation. While the mechanism of the reaction cannot be determined from the data, the rate expression and other kinetic studies suggest a process in which hydrogen is adsorbed on the small fraction of the surface not occupied by acetylenic residues and the reaction takes place between this adsorbed hydrogen and ethylene in the gas phase.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050411
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  • 133
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    The economic design of mixer-settler extractors (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 474-482 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Relationships are developed for establishing the most economic values of the major variables of a liquid-extraction process, including the concentrations of solute in recycled solvent and rejected raffinate, the solvent-to-feed ratio, and for mixer-settlers certain of the design features. Consideration is given to costs of extraction and solvent recovery, as well as to the value of unextracted solute and lost solvent. For the design of mixer settlers scale-up relationships are developed to permit prediction of the stage efficiency of a large extractor from experimental data taken on a small scale. These are expressed in terms of a scale-up index relating the relative size of the mixer with the volumetric rates of liquid flow. It is shown that the cost of multistage extractor increases with scale up in a different fashion from the stage efficiency, depending upon the scale-up index used. A detailed study of the costs for a typical case led to the development of economic scale-up indexes which, because they cover nearly a fivefold ratio of fixed to operating costs, are of fairly general utility. The common practice of scaling up with equal holding times on the large and small scale is shown to be amply safe from the point of view of stage efficiency to be realized on the large scale but usually uneconomic.Simplification of the complete system of equations permits rapid estimation of the most economic circumstances for any type of countercurrent extractor of which the cost per stage is proportional to Qg.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050414
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  • 134
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    The vapor-phase catalytic hydration of ethylene oxide to glycols (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 496-501 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The vapor-phase reaction between ethylene oxide and water to form glycols has been carried out under a wide range of conditions with particles of polystyrene-sulfonic acid ion exchange resins used as catalysts. The rates observed appeared to be directly proportional to the product of the partial pressure of ethylene oxide and the amount of water sorbed by the resin. By use of the Brunauer, Emmett, and Teller equation to describe the amount of water sorbed by the resin, the experimental data were correlated over a sixty-fold range of reaction rates with a mean deviation of 15%.To obtain data of value in elucidating reaction mechanisms, the reactor was usually run under “differential” conditions, that is low conversions. However in a few runs conversions of as high as 54% were obtained for a contact time of 0.02 sec. The ratio of ethylene glycol to higher glycols (selectivity) obtained varied between 73 and 99% but was usually above 80% under conditions of high conversion. However it could also be reduced forcibly to produce higher glycols as the major product, if desired.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050417
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  • 135
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    Interfacial turbulence: Hydrodynamic instability and the marangoni effect (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 514-523 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The origin of interfacial turbulence, spontaneous agitation of the interface between two unequilibrated liquids, has been explained in terms of classical flow, diffusion, and surface processes. The essence of the explanation is the long-known though much neglected Marangoni effect, wherein movement in an interface is caused by longitudinal variations of interfacial tension. It is proposed that interfacial turbulence is a manifestation of hydrodynamic instability, which is touched off by ever present, small, random fluctuations about the interface.A simplified mathematical model has been analyzed in order to detail the mechanism of the “interfacial engine” which supplies the mechanical energy of interfacial turbulence. In its present form the analysis incorporates several drastic simplifications, though ways of removing some of these have been suggested. The groundwork has been laid for the more elaborate analyses that are needed for a decisive test of the theory.The analysis shows how some systems may be stable with solute transfer in one direction yet unstable with transfer in the opposite direction, a striking result. It also suggests that interfacial turbulence is usually promoted by (1) solute transfer out of the phase of higher viscosity, (2) solute transfer out of the phase in which its diffusivity is lower, (3) large differences in kinematic viscosity and solute diffusivity between the two phases, (4) steep concentration gradients near the interface, (5) interfacial tension highly sensitive to solute concentration, (6) low viscosities and diffusivities in both phases, (7) absence of surface-active agents, and (8) interfaces of large extent.That some of these effects have been observed in the laboratory lends credence to the theory.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050421
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  • 136
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    Reply (1959)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 5 (1959), S. 5D-5D 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690050431
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  • 137
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    Schwefel - Stickstoff - Fluorverbindungen VI. Über Thioisodithiazylfluorid S3N2F2 (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 298 (1959), S. 72-77 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: In addition to the formation of S4N4, greenish-yellow crystal sheets of S3N2F2 are deposited from a mixture containing SN2F2 and SNF at pressures form 600 to 700 mm Hg. S3N2F2 crystallizes in two polymorphic forms; the melting and decomposition points are 85 and 95 - 97° Cm, respectively; solubility in CCl4 at 20°C: 1.5 grs./100 grs. The observed formation of S3N2F2 is discussed in respect to the tendency of stable S—F-bond formation.
    Notes: Aus einem Gemisch von SN2F2 und SNF scheidet sich bei Drucken von 600 bis 700 Torr an der Wand des Reaktionskolbens ein gelber Beschlag ab, während gleichzeitig grüngelbe Kristallblättchen ins Innere des Kolbens wachsen. Bei letzteren handelt es sich um S3N2F2, das in zwei polymorphen Kristallarten auftritt. Fp. 85°C; Zers.-Pkt. 95-97°C. Löslichkeit in CCl4: 1,5 g/100 g bei 20°.Aus dem gelben Wandbeschlag wird durch Dekantieren mit Acetonitril S4N4 erhalten. Die Bildung von S3N2F2 wird diskutiert und festgestellt, daß die Tendenz zur Bildung stabiler S—F-Bindungen als Ursache für die Zersetzung von SN2F2 + SNF angesehen werden kann.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19592980111
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  • 138
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    Infrarotspektroskopische und röntgenographische Untersuchungen am Quecksilber(II)-äthylendiaminchlorid (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 298 (1959), S. 142-151 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The reaction between 1 mol mercuric chloride and 1 mol ethylenediamine (I) leads in aqueous and in diluted alcoholic solutions to a mixture of mercuric chloride and mercuric ethylenediamine chloride, Hg(NH2CH2CH2NH2)Cl2 (II). It is possible to get the compound (II) in pure state in absolute alcolholic solution. X-ray and infrared investigations give evidence for a chain-structure of (II) with (I) bounded in the trans-form.
    Notes: In wäßrigen und verdünnten alkoholischen Lösungen reagieren 1 Mol Quecksilber(II)-chlorid und 1 Mol Äthylendiamin unter Bildung unlöslicher Produkte, die aus Gemischen von Hg(NH2—CH2—CH2—NH2)Cl2 und HgCl2 bestehen. Wird die Reaktion unter Wasserausschluß in absolutem Alkohol ausgeführt, so entsteht reines Quecksilber(II)-äthylendiaminchlorid, Hg(en)Cl2 (en = Äthylendiamin). Durch die Diskussionen des Debyeogramms und des Infrarotspektrums der Verbindung können Ringstrukturen ausgeschlossen werden; es liegt eine Kettenstruktur mit trans-Stellung der XH2-Gruppen (X = N oder C) der Äthylendiamin-Molekel vor.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19592980305
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  • 139
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    Darstellung und thermische Zersetzung der Dichlorphosphorsäure H[PO2Cl2] (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 298 (1959), S. 152-163 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Pure crystallizable dichlorophosphoric acid H[PO2Cl2] is prepared by reaction of dichlorophosphoric acid anhydride P2O3Cl4 with the calculated amount of water at temperatures below -30°C.When heated under reduced pressure (12 mm), and hydrogen chloride simultaneously is passed through, the dichlorophosphoric acid splits off water and is therefore again transformed into the dichlorophosphoric acid anhydride P2O3Cl4.Contrary to this the dichlorophosphoric acid decomposes, when heated under atmospheric pressure, mainly by splitting off HCl.
    Notes: Reine, kristallisierbare Dichlorphosphorsäure H[PO2Cl2] läßt sich durch Reaktion von Dichlorphosphorsäureanhydrid P2O3Cl4 mit der berechneten Menge Wasser bei Temperaturen unterhalb -30°C darstellen.Beim Erhitzen unter vermindertem Druck (12 mm) und gleichzeitigem Durchleiten von Chlorwasserstoff spaltet die Dichlorphosphorsäure Wasser ab und geht dadurch wieder in das Dichlorphosphorsäureanhydrid P2O3Cl4 über.Dagegen zersetzt sich die Dichlorphosphorsäure beim Erhitzen unter Atmosphärendruck vorwiegend unter HCl-Abspaltung.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19592980306
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  • 140
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    Über Phosphornitrilfluoride (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 298 (1959), S. 193-193 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19592980309
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  • 141
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    Über die Einwirkung der Halogenate auf Vanadin(III)-oxyd in wäßriger Lösung (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 298 (1959), S. 194-201 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Vanadium(III)oxide, V2O3, is autocatalytically oxidized to vanadium(V)oxide or vanadates(V) by acid or neutral solutions of alkali metal chlorates, bromates, iodates, and periodates. By perchlorate ions, V2O3 is converted to vanadium(IV) compounds. The influence of pH and buffer systems has been investigated. The velocity of oxidation decreases from periodate, bromate, iodate, chlorate to perchlorate. In alkaline solutions the reaction of iodates is greater than that of bromates.
    Notes: Vanadin(III)-oxyd, V2O3, wird sowohl in saurer als auch ursprünglich neutraler Lösung der Alkalichlorate, -bromate, -jodate und -perjodate zu Vanadin(VI)-oxyd bzw. Vanadat und bei der Einwirkung von Perchlorationen langsam zur Vanadin(IV)-stufe oxydiert. Die Reaktionen verlaufen offenbar autokatalytisch. Die Halogenate wirken auch dann oxydierend, wenn der Einfluß der bei den Reaktionen gebildeten Wasserstoffionen durch Zusatz von Natriumhydrogencarbonat oder Calciumcarbonat zum Reaktionsgemisch aufgehoben wird und sogar unter alkalischen Bedingungen, wenn auch langsamer als in ungepufferten Lösung. Die Halogenate werden allgemein zur Halogenidstufe reduziert mit Ausnahme von Perjodat, das, falls reichlich von ihm vorhanden ist, zu Jodat reduziert wird. Die Oxydationsgeschwindigkeit nimmt in der Reihenfolge: Perjodat 〉 Bromat 〉 Jodat 〉 Chlorat 〉 Perchlorat ab. In alkalischen Lösungen oxydieren die Jodate schneller als die Bromate.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19592980310
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  • 142
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    Spektroskopische Untersuchungen an Siliciumverbindungen. VIII. Die Schwingungsspektren einiger Tetramethyldisiloxane (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 299 (1959), S. 78-86 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Raman and infrared spectra of compounds of the type X (CH3)2SiOSi(CH3)2X (X = H, OH, Cl, C6H5 are reported and the frequencies are assigned. The shift of the valence frequencies of the framework is briefly discussed. The approximate valence force constant of the SiOSi bond in HO(CH3)2SiOSi(CH3)2OH is calculated to 4,97 mdyn/Å.
    Notes: Die Raman- und IR-Spektren der Verbindungen X(CH3)2SiOSi(CH3)2X (X = H, OH, Cl und C6H5) werden mitgeteilt und die Frequenzen den einzelnen Schwingungsformen zugeordnet. Der Gang der Valenzfrequenzen des Gerüstes wird kurz diskutiert. Für das Tetramethyldioxydisiloxan wird die angenäherte Valenzkraftkonstante für die Siloxanbindung zu 4,97 mdyn/Å berechnet.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19592990110
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    Masthead (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 299 (1959) 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19592990301
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  • 144
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    Zur Frage des Reaktionsmechanismus des HCOOH-Zerfalls an Ni-Oberflächen. „Über den Mechanismus des Ameisensäuredampf-Zerfalls am Nickel“ (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 299 (1959), S. 151-152 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A mechanism of the decomposition of the formic acid on a surface of nickel is proposed.
    Notes: Es wird ein Mechanismus der genannten Reaktion angegeben.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19592990305
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  • 145
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    Spektroskopische Untersuchungen an Siliciumverbindungen. IX. Über die Bindungsverhältnisse in der Siliciumchemie (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 299 (1959), S. 138-150 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The bonds between silicium and elements of a great electronegativity are customary stronger than single bonds. This is shown by the valence force constants. The valence frequencies of substituted compounds indicate that strong electronegative substituends strengthen adjacent bonds. The mechanism of this strengthening is discussed.
    Notes: Die Valenzkraftkonstanten für Bindungen zwischen Silicium und stark elektronegativen Partnern zeigen, daß diese Bindungen in der Regel stärker als normale Einfachbindungen sind. Die Valenzfrequenzen in gemischt substituierten Verbindungen lassen erkennen, daß stark elektronegative Substituenten benachbarte Bindungen verstärken. Der Mechanismus dieser Bindungsverstärkungen wird diskutiert.
    Additional Material: 18 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19592990304
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  • 146
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    Bleiverbindungen mit Apatitstruktur, insbesondere Blei-Jod- und Blei-Brom-Apatite (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 300 (1959), S. 41-50 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The compounds Pb5(XO4)3Z (with X = P, As, V and Z = F, Cl, Br, J) have been prepared and investigated by X-ray analysis. With the exception of Pb5(PO4)3J, all compounds crystallize in apatite structure which is orthorhombically deformed in the case of Pb5(AsO4)3J.
    Notes: Es wird die Synthese von Bleiapatiten der Zusammensetzung Pb5(XO4)3Z [X = P, As, V und Z = F, Cl, Br, J] beschrieben. Röntgenaufnahmen ergeben in allen Fällen außer Pb5(PO4)3J die Apatitstruktur, im Falle des Pb5(AsO4)3J ist sie rhombisch deformiert. Einige Strukturdaten dieser Verbindungen werden mitgeteilt.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593000104
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  • 147
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    Zur Kenntnis der Chemie der Metallcarbonyle in flüssigem Ammoniak. IV. Über Neue Substitutionsprodukte des Cr(CO)6 mit aromatischen Aminen (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 300 (1959), S. 51-60 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: By interaction of alkali pentacarbonyl chromates(-II) with aromatic mono-, di-, and triamines at room temperature only pentacarbonyl amine chromium(0) compounds are formed. Wheras m- and p-phenylene diamine are linked with two and 1, 3, 5-triaminobenzene with three Cr(CO)5-groups, o-phenylene diamine forms a corresponding compound with only one Cr(CO)5-group. Unlike ethylene diamine or cyclohexane diamine(1,2) o-phenylene diamine does not give a tetracarbonyl chromium(0) compound.
    Notes: Bei der Umsetzung von Alkali-pentacarbonyl-chromaten(-II) mit wäßrigen Lösungen von aromatischen Mono-, Di- und Triaminen bei gewöhnlicher Temperatur erhält man stets Pentacarbonyl-amin-chrom(0)-verbindungen, die sich als echte Substitutions-produkte des Cr(CO)6 erweisen. Während m- und p-Phenylendiamin zwei und 1,3,5-Triaminobenzol drei Cr(CO)5-Gruppen zu binden vermögen, erhält man im Falle des o-Phenylendiamins eine entsprechende Verbindung mit nur einer Cr(CO)5-Gruppe. Insbesondere entsteht bei letzterem - im Gegensatz zum Äthylendiamin - keine Tetracarbonyl-chrom(0)-verbindung. Eine solche bildet sich hingegen, wenn man an Stelle des o-Phenylendiamins das hydrierte o-Phenylendiamin, also Cyclohexandiamin(1,2), zur Reaktion bringt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593000105
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  • 148
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    Beiträge zur Chemie der Elemente Niob und Tantal. XXI. Präparative Untersuchungen mit niederen Niobchloriden (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 300 (1959), S. 1-32 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The system niobium-chlorine has been investigated.The formation of niobiumtrichloride, with a composition range from NbCl2.67 to NbCl3.1, has been studied by thermal decomposition of niobium tetrachloride, reduction of NbCl5 with hydrogen, and the chemical transport reaction: \documentclass{article}\pagestyle{empty}\begin{document}$${\rm NbcL}_{\rm X} {\rm f + (4 - x)NbCl}_{\rm 5} {\rm g = (5 - x)NbCl}_{\rm 4} {\rm g}$$\end{document}.The thermal and chemical properties of the niobiumtrichloride phase are described.Niobium(II)-chloride which is a stoichiometric compound is formed in the reactions Nb+NbCla2.67, NbSNbCI5, and NbCl5+H. There is no evidence for the existence of niobium (I)-chloride.
    Notes: Das Niobtrichlorid besitzt einen großen Homogenitätsbereich. Die Phasengrenzen liegen bei den Zusammensetzungen NbCl3,1 und NbCl2,67. Diese Grenzzusammensetzungen fallen schon beim thermischen Abbau des Niobtetrachlorids und bei der Reduktion von NbCl5 mit H2 auf. Weiteren Aufschluß geben Experimente, bei denen die Trichloridphase NbClx durch eine chemische Transportreaktion \documentclass{article}\pagestyle{empty}\begin{document}$${\rm NbcL}_{\rm X} {\rm f + (4 - x)NbCl}_{\rm 5} {\rm g = (5 - x)NbCl}_{\rm 4} {\rm g}$$\end{document} als Gleichgewichtsbodenkörper gewonnen wird. Die Zusammensetzung der Trichloridphase hängt in der zu fordernden Weise vom NbCl5-Druck ab. Aus Pulverdiagrammen und aus der Farbe der Trichlorid-Präparate läßt sich ebenfalls die Breite der Trichloridphase und auch die Zusammensetzung eines im homogenen Gebiet liegenden Präparats ableiten.Angaben über das Niobtrichlorid hinsichtlich seines thermischen und chemischen Verhaltens werden zusammengestellt.Niob(II)-chlorid wird aus Nb + NbCl2,67 gewonnen. Auch beim Erhitzen von Nb im NbCl5-Argon-Strom und bei der Reduktion von NbCl5 mit H2 ist die NbCl2-Bildung nachweisbar. NbCl2 besitzt keine erhebliche Phasenbreite. Das chemische und thermische Verhalten des NbCl2 werden studiert.Das metallische Niob löst keine nachweisbaren Cl-Mengen. Ein Niob(I)-chlorid wurde nicht gefunden.Zusammenfassend werden die Phasenverhältnisse im System Niob-Chlor dargestellt und weitere Probleme der Trichloridphase erörtert.Das letzte Kapitel bringt Analysenverfahren.
    Additional Material: 16 Ill.
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    URL: http://dx.doi.org/10.1002/zaac.19593000102
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    Herstellung und Eigenschaften der Ternären Nitride von Vanadin, Niob und Tantal der Zusammensetzung Li7MeN4 (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 300 (1959), S. 61-71 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The compound Li7VN4 containing vanadium(V) has been prepared by heating Li3N and VN in nitrogen atmosphere to a temperature of 680 °C. Li7VN4 crystallizes in an superstructure of fluorite lattice (space group T4d with a = 9.604 Å).Similarly, the compounds Li7NbN4 and Li7 TaN4 have been synthesized.
    Notes: 1. Durch Erhitzen von Li3N und VN in einer Stickstoffatmosphäre auf 680 °C wurde die Verbindung Li7VN4 hergestellt. Die Oxydationsstufe 5 des Vanadins wurde mit drei verschiedenen Methoden bestimmt. Die ternäre Verbindung ist thermisch beständiger als die zwei binären Nitride. Li7VN4 kristallisiert in einer Überstruktur des Flußspatgitters in der Raumgruppe T4d mit a = 9,604 Å. Ein ternäres Nitrid niedrigerer Oxydationsstufe konnte nicht hergestellt werden.2. Entsprechende Versuche führten zu den Verbindungen Li7NbN4 und Li7TaN4; diese Verbindungen sind chemisch und thermisch etwas stabiler als die Vanadinverbindung.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593000106
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  • 150
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    Über Halogenide des dreiwertigen Titans (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 299 (1959), S. 213-226 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A technical alteration of the TiCl3-preparation according to SHERFEY is described.The phase diagrams of the systems NaCl/TiCl3, KCl/TiCl3 and KBr/TiBr3 were investigated by thermal analysis. There exist the compounds: Na3TiCl6 (incongruent m. p. = 553° C), K3TiCl6 (m. p. = 783° C), K2TiCl5 (incongruent m. p. = 605° C), K3TiBr6 (m. p. = 662° C). The results were confirmed by microscopic and X-rax methods.In the NaCl- and KCl-rich melts exists the complex [TiCl6]3- probably.
    Notes: Eine technische Abänderung der TiCl3-Darstellung nach SHERFEY wird mitgeteilt.Die Untersuchung der Systeme NaCl/TiCl3, KCl/TiCl3 und KBr/TiBr3 mit Hilfe der Differential-Thermoanalyse ergab folgendes: Im System NaCl/TiCl3 existiert die Verbindung Na3TiCl6. Sie schmilzt inkongruent bei 553° C. Das Zustandsdiagramm KCl/TiCl3 zeigt die Verbindungen K3TiCl6 (Schmp. = 783° C) und K2TiCl5 an, wobei die letztere bei 605° C inkongruent schmilzt. Im System KBr/TiBr3 tritt die bei 662° C kongruent schmelzende Verbindung K3TiBr6 auf.Das Ergebnis der thermischen Analyse wird durch mikroskopische und röntgenographische Untersuchungen gesichert.Die Berechnung der Liquiduskurve auf der NaCl- bzw. KCl-reichen Seite der Zustandsdiagramme legt nahe, die Existenz von [TiCl6]3--Ionen in der Schmelze anzunehmen.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19592990315
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    Masthead (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 299 (1959) 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19592990501
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  • 152
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    Zur Kenntnis des Verhaltens von Nichtmetallchalkogeniden gegenüber flüssigem Ammoniak. III. Das Verhalten von Tetraphosphor-heptasulfid gegenüber flüssigem Ammoniak (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 299 (1959), S. 241-251 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Tetraphosphorus-heptasulfide, P4S7, undergoes disproportionation in liquid ammonia at a temperature of -33° C according to the equation mentioned in „Inhaltsübersicht“.Tetraphosphorus-heptasulfide, P4S7, undergoes disproportionation in liquid ammonia at a temperature of -33° C according to the equation mentioned in „Inhalts-übersicht“.From the reaction products, the properties of which are described there is evidence for the structure of P4S7, determined by X-ray diffraction(4). The trimer orange-coloured [P3S3(NH)4]4-anion is supposed to have a cyclic structure.The thermal decomposition of (NH4)3[PS4] and (NH4)2[PS3NH2], yielding P4N5, is discussed.
    Notes: Während die beiden niederen Phosphorsulfide(2) P4S3 und P4S5 mit flüssigem Ammoniak bei -33° unter Bildung von Ammoniumverbindungen mit vier P-atomen in der Molekel reagieren und P4S10(3) einfach gebaute Thiophosphate bildet, unterliegt Tetraphosphor-heptasulfid in diesem Medium gemäß 2P4S7 + 17 NH3 → (NH4)3[PS4] + 2 (NH4)2[PS3NH2] + (NH4)3[P3S3(NH)3] + NH4[P2SN] der Disproportionierung.Der obige Reaktionsverlauf läßt sich einerseits durch quantitative Erfassung der sich in ihrer Löslichkeit unterscheidenden Thiophosphate (NH4)3[PS4] und (NH4)2[PS3NH2], andererseits durch Isolierung der Verbindung [P3S3(NH)3], in der der Phosphor die Oxydationszahl +III einnimmt, nachweisen. Die experimentellen Ergebnisse lassen sich aus der für das P4S7 röntgenographisch nachgewiesenen Struktur(4) ableiten.Die Eigenschaften der erhaltenen Verbindungen werden beschrieben und die Ergebnisse des thermischen Abbaus von (NH4)3[PS4] und (NH4)2[PS3NH2], der in beiden Fällen schließlich zu P3N5 führt, diskutiert.Dem trimeren orangefarbenen Thio-imidophosphit-anion [P3S3(NH)3]3- wird ringförmige Struktur zugeschrieben.
    Additional Material: 3 Ill.
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    URL: http://dx.doi.org/10.1002/zaac.19592990502
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  • 153
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    Magnetochemische Untersuchungen im System FeO1 + x · MgO (O 〈x〈 0,5) (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 299 (1959), S. 271-280 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The magnetic susceptibility of FeO1+x · 0,925 MgO (0 〈 x 〈 0,5) at 700, 750, 800, 850 and 900° C has been measured. The results are compared with values calculated under certain conditions and with the magnetic susceptibility of the system Fe—O, received in previous investigations.The isotherms of the susceptibility of magnesiowüstite (FeO1+y · 0,925 MgO) and wüstite (FeO1+y) allow to make some conclusions of the structure of the magnesiowüstite phase. It seems very probable that the ions Fe3+ both in magnesiowüstite and in wüstite occur in the form of accumulations. This „submicroheterogenity“ does not mean that magnesiowüstite from the point of view of thermodynamics consists of two solid phases.The homogeneity range of magnesiowüstite phase spreads at 700° C from FeO1,04 · 0,925 MgO to FeO1,09 · 0,925 MgO and at 900° C about FeO1,015 · 0,925 MgO to about FeO1,11 · 0,925 MgO.
    Notes: Im System FeO1+x · 0,925 MgO (0 〈 x 〈 0,5) wurde für 15 Präparate die magnetische Suszeptibilität bei 700°, 750°, 800°, 850° und 900°C gemessen. Die Ergebnisse werden mit den unter bestimmten Voraussetzungen berechneten Suszeptibilitäten und mit den für das System Fe—O früher erhaltenen experimentellen Werten verglichen. Aus dem Verlauf der Suszeptibilitätsisothermen in den Homogenitätsbereichen der „Magnesiowüstit“-Phase (feste Lösungen von FeO1+y und 0,925 MgO) und der Wüstitphase (FeO1+y) konnten gewisse Schlüsse in bezug auf die Struktur der „Magnesiowüstit“-Phase gezogen werden. Es ist wahrscheinlich, daß die Fe3+-Ionen im Magnesiowüstit, ähnlich wie im Wüstit, in Form von Ansammlungen vorhanden sind. Diese „Submikroinhomogenität“ bedeutet nicht, daß Magnesiowüstit im thermodynamischen Sinne aus zwei festen Phasen besteht.Der Homogenitätsbereich der Magnesiowüstitphase erstreckt sich bei 700° C von FeO1,04 · 0,925 MgO bis FeO1,09 ·0,925 MgO und bei 900° C von FeO1,015 · 0,925 MgO bis ungefähr FeO1,11 · 0,925 MgO.Das Curie-Weiss-Gesetz wird von den im Homogenitätsbereich der Magnesiowüstitphase liegenden Präparaten befolgt.Die Abhängigkeit der magnetischen Suszeptibilität von der Zusammensetzung bei höheren Sauerstoffgehalten (x 〉 1,1) ist infolge des Auftretens zweier fester Phasen veränderlicher Zusammensetzung kompliziert.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19592990504
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    Schwermetallkomplexe mit Thiopicolinsäure-anilidBald nach dem Einreichen des Manuskriptes der vorliegenden Arbeit erschien über den gleichen Gegenstand eine Veröffentlichung von F. Lions u. K. F. Martin, J. Amer. chem. Soc. 80, 1591 (1958). Auf die Ergebnisse der australischen Autoren wollen wir in unserer zweiten diesbezüglichen Publikation eingehen. (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 299 (1959), S. 281-291 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Thiopicolinic acid anilide reacts with ions of heavy metals to form inner complex salts. Complexes of 12 metals have been prepared. The coordination compound with Fe(II)-ions is deep violet.
    Notes: Thiopicolinsäure-anilid fungiert gegenüber Schwermetallionen, besonders azo- und chalkophilen, als Innerkomplexligand wie als Neutralligand(1). Das Anilid wird als Anion der tautomeren Iminothiol-Form von dem betreffenden Metallion innerkomplex koordiniert, wobei je nach Ladungs- und charakteristischer Koordinationszahl des Zentrums entweder ladungslose oder Acido-Innerkomplexe entstehen. Analytisch definierte Komplexe wurden von 12 verschiedenen Metallen gewonnen, wobei die sehr intensive Violettfarbe der Eisen(II)-komplexe hervorzuheben ist.
    Additional Material: 7 Ill.
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    URL: http://dx.doi.org/10.1002/zaac.19592990505
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  • 155
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    Ultrarotspektren von Tellursäuren, Telluraten und Antimonaten (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 301 (1959), S. 161-170 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The infrared spectra of some telluric acids, tellurates and antimonates are measured. The constitution of these compounds is discussed.
    Notes: Es werden die Ultrarotspektren der Verbindungen H6TeO6, (H2TeO4)x, Na2H4TeO6, K2H4TeO6 · 3 H2O, Na[Sb(OH)6], KSbO3 · 2,2 H2O, Na2HSb3O9 · 4 H2O, K2HSb3O9 · 5 H2O, NaSbO3 und KSbO3 im Bereich 400-4000 cm-1 angegeben und ausgedeutet. Die Konstitution dieser Verbindungen wird diskutiert.
    Additional Material: 3 Ill.
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    URL: http://dx.doi.org/10.1002/zaac.19593010305
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  • 156
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    Die Schwingungsspektren von verschiedenen Cyanaten des Siliciums (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 300 (1959), S. 194-204 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: From infrared spectra in the NaCl-region and Raman spectras of several cyanates of silicon (see „Inhaltsübersicht°“), the isocyanate structure for all these compounds has been demonstrated. There is a small multiple bond character of Si-N-bonds.
    Notes: Es wurden die Infrarot-Spektren im NaCl-Bereich und die Raman-Spektren von (CH3)3Si(NCO), (CH3)2Si(NCO)2, CH3Si(NCO)4, Si(NCO)4 und Si2O(NCO)6 aufgenommen und eine Zuordnung zu den Grundschwingungen dieser Molekel vorgenommen. Für alle Verbindungen konnte die Isocyanatstruktur spektroskopisch nachgewiesen werden, auch für die in der Literatur mit normaler Cyanatstruktur beschriebene Verbindung. Bei dieser handelt es sich um ein Gemisch von Si(NCO)4 + Si2O(NCO)6. Weiterhin ergab sich aus den Spektren der Isocyanate, daß die Si-N-Bindungen einen geringen Mehrfachbindungsanteil haben.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593000309
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  • 157
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    Farbe und Konstitution bei anorganischen Feststoffen. II. Die Lichtabsorption des zweiwertigen Nickels in oxydischen Koordinationsgittern (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 300 (1959), S. 159-174 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The influence of coordination number, lattice expansion, and decreasing degree of symmetry or distortion of the coordination polyhedron on the light absorption of Ni2+-ions in various oxides (see „Inhaltsübersicht°“) have been studied by spectrophotometric determination of powder remission.As in the case of Co(II)-containing oxides, the main absorption band is shifted toward the UV-region by raising the coordination number from 4 to 6. Displacement toward the red sometimes occurs on lattice expansion.Stronger shiftings to the red and high intensities of absorption have been observed when the decrease of point symmetry of coordination polyhedron is accompanied by stronger distortion.The ranges of homogeneity in the system Zn2SiO4/Ni2SiO4 have been determined spectrometrically.
    Notes: Durch spektralphotometrische Bestimmung der Remission von Pulvern wurde die Abhängigkeit der Lichtabsorption des Ni2+ von folgenden Faktoren untersucht: 1. Koordinationszahl (Ni0,1Mg0,9Al2O4, KZ = 4, Ni0,1Mg0,9O, KZ = 6) 2. Gitterdehung (Ni0,1Mg0,9Al2O4 → Ni0,1Mg0,9Ga2O4), (Ni0,1Mg0,9O → Ni0,01Mg0,69Zn0,3O), (Ni0,1Mg0,9TiO3 → Ni0,1Cd0,9TiO3) 3. Symmetrieerniedrigung bzw. Verzerrung des Koordinationspolyeders (Ni0,1Zn1,9SiO4, Ni0,01Zn0,99O), (Ni0,25Mg1.75SiO4, Ni0,1Mg0,9TiO3). Wie im Fall des Co2+ bewirkt hier die Erhöhung der Koordinationszahl von 4 auf 6 bei einer Eigensymmetrie des Koordinationspolyeders Td bzw. Oh eine UV-Verschiebung der Hauptabsorptionsbanden. Eine Gitterdehnung kann, insbesondere bei einfachen Gittern, eine Rotverschiebung bewirken. Eine Erniedrigung der Punktsymmetrie des Koordinationspolyeders hat nur dann eine stärkere Rotverschiebung und Erhöhung der Absorptionsintensität zur Folge, wenn damit gleichzeitig eine stärkere Verzerrung des Koordinationsoktaeders verbunden ist. Das System Zn2SiO4/Ni2SiO4 wurde spektralphotometrisch untersucht und die Grenzen der Homogenitätsgebiete aus dem Vergleich der Spektren ermittelt.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593000307
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    Über Schwermetallamide. IX. Hydroxokobalt(III)-amide (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 300 (1959), S. 175-193 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Two isomeric hydroxy-cobalt(III)-amides, I and II, of the composition [Co(NH2)2OH]n have been prepared by interaction of KNH2 with [Co(NH3)5OH](NO3)2 and [Co2(NH3)8(OH)2]X4 (X = NO3- or SCN-), respectively, in liquid ammonia. The reactions of the amorphous amides, the structures of which are discussed, with a surplus of KNH2 and NH4NO3 in liquid ammonia and the thermal decomposition of II have been studied.The reaction between [Co(NH3)6](NO3)3 and KNH2 yields {[Co2(NH2)5NH3]n(NO3)n}.
    Notes: Durch Umsetzung von [Co(NH3)5(OH)](NO3)2 (I) und [Co2(OH)2(NH3)8]X4 (II) (X = NO3 oder SCN) mit KNH2 in flüssigem NH3 wurden zwei strukturisomere Mono-hydroxokobalt(III)-amide {Co(NH2)2OH}n (III bzw. IV) als unlösliche, amorphe Niederschläge erhalten. Das aus II gewonnene m̈-Monohydroxokobalt-(III)-amid (IV) besitzt noch die Di-m̈-hydroxogruppierung, sofern die Fällung bei tiefen Temperaturen (-20° C) erfolgt. Beide Verbindungen III und IV sind als Derivate des Kobalt(III)-amids zu betrachten und sind wie dieses mehr oder weniger hochpolymer. Unter Berücksichtigung des Strukturprinzips ist III als poly-m̈-Hydroxo-di-m̈-amino-kobalt(III) und IV als poly-[Di-m̈-hydroxo-m̈-amino-kobalt-tri-m̈-amino-kobalt(III)] zu bezeichnen. Der aus I resultierende Bodenkörper (III) reagiert mit NH4NO3 in flüssigem NH3 unter additiver Salzbildung zu {[Co2(OH)2NH2(NH3) 6]n(NO3)3n} (V), einem amorphen Nitrat, mit polymerem Kation, das noch alle OH-Gruppen enthält. IV reagiert ebenfalls mit NH4NO3 unter additiver Salzbildung, jedoch unter Eliminierung der Hälfte aller OH-Gruppen zu {[Co2(OH)(NH2)2(NH3)6]n(NO3)3n} (VIII). Mit KNH2 erfolgt ein Austausch von OH gegen NH2 sowohl in III als auch in IV unter Bildung von KOH. Bei der Reaktion von II mit KNH2 konnte ein definiertes Zwischenprodukt {[Co2(OH)2(NH2)3(NH3)2]n(NO3)n} (VI) gefaßt werden. Ein analoges; um 1 NH3 ärmeres Zwischenprodukt {[Co2(NH2)5(NH3)]n(NO3)n} (VII) - die OH-Gruppen sind durch NH2 ersetzt - entsteht auch bei der Reaktion von [Co(NH3)6](NO3)3 mit KNH2 in flüssigem NH3. Der thermische Abbau von IV führt unter NH3- und N2-Abspaltung schließlich zu CoO. Eine Wasserabspaltung wurde hierbei nicht beobachtet.
    Additional Material: 3 Ill.
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    URL: http://dx.doi.org/10.1002/zaac.19593000308
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    Über ein Siliciumphosphid Si2P (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 300 (1959), S. 205-209 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The compound Si2P is formed at 450 °C from SiH4 and PH3, if the starting gas mixtures are containing SiH4 and PH3 in the ratio of 1 : 1 or 1 : 2. Si2P is a blue black non-crystalline substance. At 600 °C Si2P decomposes into Si and SiP as recognized from X-ray diagrams and IR-spectra. SiP formed from Si2P is identical with that prepared by Biltz1) from its elements.
    Notes: Aus SiH4 und PH3 bildet sich um 450 °C die Verbindung Si2P, wenn man von Gasmischungen SiH4:PH3 = 1 : 1 oder 1 : 2 ausgeht. Si2P ist ein blauschwarzes, röntgenamorphes Produkt. Um 600 °C zerfällt es in Si und SiP, wie aus den Röntgendiagrammen und den IR-Aufnahmen zu erkennen ist. Das aus dem Si2P entstehende SiP ist mit dem von Biltz1) aus den Elementen dargestellten SiP identisch.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593000310
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    Masthead (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 300 (1959) 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593000501
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  • 161
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    Spektroskopische Untersuchungen an Siliciumverbindungen. X. Schwingungsspektren und Struktur des Tetramethyl-cyclo-disilthians und des Hexamethyl-cyclo-trisilthians (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 300 (1959), S. 210-220 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Raman and infrared spectra of [(CH3)2SiS]2 and [(CH3)2SiS]3 are reported and the frequencies are assigned as far as possible. [(CH3)2SiS]2 has the symmetrie D2h with a planar ring. The ring of [(CH3)2SiS]3 is puckered. The most probable symmetrie is here Cs (cis structure). The correlation of the SiXSi angle and the ring structure of siloxanes, silazanes and silthianes is discussed.
    Notes: Die Raman- und IR-Spektren des [(CH3)2SiS]2 und [(CH3)2SiS]3 werden mitgeteilt und die Frequenzen soweit wie möglich den einzelnen Schwingungsformen zugeordnet. Für das [(CH3)2SiS]2 ergibt sich eine ebene Ringstruktur nach D2h. Der Ring des [(CH3)2SiS]3 ist gewellt und hat höchstwahrscheinlich Cis-(Wannen-)Struktur, Punktgruppe Cs. Der Zusammenhang zwischen SiXSi-Winkel und Ringstruktur der Siloxane, Silazane und Silthiane wird diskutiert.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593000311
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  • 162
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    Das Verhalten von Amidophosphaten beim Erhitzen (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 300 (1959), S. 221-224 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Mixtures of amides of imidophosphoric acids with the composition PnOn(NH)n-1 · (NH2)n+2 are formed from OP(NH2)3 by heating at 100° C. - NaPO2)2 respectively Na2PO3NH2 looses all nitrogen by heating in the air at 900° resp. 1000° C and forms glassy (NaPO3)x resp. Na4P2O7.
    Notes: Amidophosphate werden beim Erhitzen infolge intermolekularer Abspaltung von Ammoniak zu Imidopolyphosphaten kondensiert. Aus Phosphoroxytriamid entstehen bei etwa 100° Gemische von Imidophosphorsäureamiden der Formel PnOn(NH)n-1(NH2)n+2 mit n = 2…5. Naturiumdiamidophosphat bzw. Natriummonoamidophosphat geben beim Erhitzen an der Luft auf 900° bzw. 1000° den gesamten Stickstoff ab und gehen in glasiges Natriumpolyphosphat (NaPO3)x bzw. Natriumdiphosphat über.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593000312
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  • 163
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    Eine Abgekürzte Schreibweise für Phosphorsäuren niederer Oxydationszahl Vorbemerkung zu den folgenden Mitteilungen (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 300 (1959), S. 225-228 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: An abbreviated nomenclature is proposed for acids of phosphorus with lower oxydation number.
    Notes: Es wird eine abgekürzte Bezeichnungsweise für Phosphorsäuren niederer Oxydationszahl vorgeschlagen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593000502
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  • 164
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    Über Phosphorsäuren niederer Oxydationszahl. II. Über die \documentclass{article}\pagestyle{empty}\begin{document}${\rm (- P -)}_{\rm 6}$\end{document}-Ringsäure (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 300 (1959), S. 237-249 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Red phosphorus suspended in alkali hydroxyde solutions reacts with hypohalogenites under formation of salts of an acid \documentclass{article}\pagestyle{empty}\begin{document}${\rm (- P -)}_{\rm 6}$\end{document}. The oxidation number of phosphorus in this compound is 3+. The phosphorus atoms are linked together by P - P bonds. The compound has a ring structure.
    Notes: In Alkalihydroxydlösungen suspendierter roter Phosphor reagiert mit Hypohalogeniten unter Bildung von Salzen einer \documentclass{article}\pagestyle{empty}\begin{document}${\rm (- P -)}_{\rm 6}$\end{document}-Ringsäure. Die Oxydationszahl des Phosphors in der Verbindung ist 3+; die Phosphoratome sind über P - P-Bindungen miteinander verknüpft. Die Verbindung hat Ringstruktur.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593000504
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  • 165
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    Über Phosphorsäuren niederer Oxydationszahl. III. Über die \documentclass{article}\pagestyle{empty}\begin{document}$\mathop {\rm P}\limits^{\rm 4} {\rm - }\mathop {\rm P}\limits^{\rm 3} {\rm - }\mathop {\rm P}\limits^{\rm 4}$\end{document}Säure (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 300 (1959), S. 250-260 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The preparation of salts of an acid of phosphorus in which 3 phosphorus atoms are linked together in a straight chain is described. The acid is prepared from oxidates of the acid \documentclass{article}\pagestyle{empty}\begin{document}${\rm (} - \mathop {\rm P}\limits^{\rm 3} -)_6$\end{document}, from oxidates of red phosphorus and from hydrolyzates of phosphorus tribromide.
    Notes: Die Herstellung von Salzen einer Säure des Phosphors, in der 3 Phosphor-Atome linear miteinander verbunden sind, aus Oxydaten der \documentclass{article}\pagestyle{empty}\begin{document}${\rm (} - \mathop {\rm P}\limits^{\rm 3} -)_6$\end{document}-Ringsäure, aus Oxydaten des roten Phosphors und aus Hydrolysaten des Phosphortribromids wird beschrieben.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593000505
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  • 166
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    Über Phosphorsäuren niederer Oxydationszahl. I. Über Oxydation und Hydrolyse der \documentclass{article}\pagestyle{empty}\begin{document}$\mathop {\rm P}\limits^{\rm 2} {\rm - }\mathop {\rm P}\limits^{\rm 4}$\end{document}-Säure und der \documentclass{article}\pagestyle{empty}\begin{document}$\mathop {\rm P}\limits^{\rm 4} {\rm - }\mathop {\rm P}\limits^{\rm 4}$\end{document}-Säure (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 300 (1959), S. 229-236 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The \documentclass{article}\pagestyle{empty}\begin{document}$\mathop {\rm P}\limits^{\rm 4} {\rm - }\mathop {\rm P}\limits^{\rm 4}$\end{document}-acid is stable even towards 80% alkali hydroxide at 200°C. It is transformed to orthophosphate in molten anhydrous alkali hydroxide. The \documentclass{article}\pagestyle{empty}\begin{document}$\mathop {\rm P}\limits^{\rm 2} {\rm - }\mathop {\rm P}\limits^{\rm 4}$\end{document}-acid is also very stable towards alkali hydroxide. Under rigorous conditions it is oxidized to \documentclass{article}\pagestyle{empty}\begin{document}$\mathop {\rm P}\limits^{\rm 4} {\rm - }\mathop {\rm P}\limits^{\rm 4}$\end{document}-acid with yields up to 85% of theory under formation of hydrogen. High yields of \documentclass{article}\pagestyle{empty}\begin{document}$\mathop {\rm P}\limits^{\rm 4} {\rm - }\mathop {\rm P}\limits^{\rm 4}$\end{document}-acid can also be obtained by reacting iodine with \documentclass{article}\pagestyle{empty}\begin{document}$\mathop {\rm P}\limits^{\rm 2} {\rm - }\mathop {\rm P}\limits^{\rm 4}$\end{document}-acid in mineral acid solution. Copper catalyzed oxidation of \documentclass{article}\pagestyle{empty}\begin{document}$\mathop {\rm P}\limits^{\rm 4} {\rm - }\mathop {\rm P}\limits^{\rm 4}$\end{document}-acid by hypobromite in alkaline solution leads to mixtures of ortho- and pyrophosphate.
    Notes: Die \documentclass{article}\pagestyle{empty}\begin{document}$\mathop {\rm P}\limits^{\rm 4} {\rm - }\mathop {\rm P}\limits^{\rm 4}$\end{document}-Säure ist sogar gegen 80proz. Alkalihydroxyd bei 200°C beständig, erst schmelzendes wasserfreies Alkalihydroxyd verwandelt zu Orthophosphat. Auch die \documentclass{article}\pagestyle{empty}\begin{document}$\mathop {\rm P}\limits^{\rm 2} {\rm - }\mathop {\rm P}\limits^{\rm 4}$\end{document}-Säure ist gegen Alkalihydroxyd sehr beständig; bei verschärften Bedingungen wird sie mit Ausbeuten bis zu 85% unter Wasserstoffentwicklung zur \documentclass{article}\pagestyle{empty}\begin{document}$\mathop {\rm P}\limits^{\rm 4} {\rm - }\mathop {\rm P}\limits^{\rm 4}$\end{document}-Säure oxydiert. Auch bei der Einwirkung von Jod auf die \documentclass{article}\pagestyle{empty}\begin{document}$\mathop {\rm P}\limits^{\rm 2} {\rm - }\mathop {\rm P}\limits^{\rm 4}$\end{document}-Säure in mineralsaurer Lösung können hohe Ausbeuten der \documentclass{article}\pagestyle{empty}\begin{document}$\mathop {\rm P}\limits^{\rm 4} {\rm - }\mathop {\rm P}\limits^{\rm 4}$\end{document}-Säure erhalten werden. Die durch Kupfer katalysierte Oxydation der \documentclass{article}\pagestyle{empty}\begin{document}$\mathop {\rm P}\limits^{\rm 4} {\rm - }\mathop {\rm P}\limits^{\rm 4}$\end{document}-Säure in alkalischer Lösung durch Hypobromit führt zu Gemischen von Ortho- und Pyrophosphat.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593000503
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    Über Peroxyantimonate (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 301 (1959), S. 316-322 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Solutions of antimonates give with H2O2 peroxy-antimonates. These are amorphous, polymeric, insoluble substances. The approximate composition of some of these compounds is KSbO4 · 1,7 H2O, NaSbO4 · 2 H2O, KSbO4 · 1,8 H2O2 and K2HSb3O12 · 3,5 H2O. The constitution of the peroxy-antimonates is discussed with help of their infrared spectra.
    Notes: Aus Lösungen von Kaliumantimonat entstehen mit H2O2 Peroxyantimonate. Diese sind amorphe, schwer lösliche, polymere Substanzen. Isoliert wurden unter anderem Verbindungen der annähernden Zusammensetzung KSbO4 · 1,7 H2O NaSbO4 · 2 H2O, KSbO4 v 1,8 H2O2 und K2HSb3O12 · 3,5 H2O. Die Konstitution der Peroxyantimonate wird an Hand ihrer Ultrarotspektren diskutiert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593010514
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  • 168
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    Über die Hydroxylgruppen an der Oberfläche des Amorphen Siliciumdioxyds „Aerosil“ und ihre Reaktionen (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 301 (1959), S. 326-335 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions of surface hydroxyl groups have been investigated with finely divided amorphous silica (Aerosil). The hydroxyl groups react with calcium hydroxide; esters are formed by reaction with alcohols and diazomethane. Heating with thionyl chloride leads to substitution by chlorine. This reaction is especially suited for the quantitative determination of hydroxyl groups bound to silica surfaces.With lithium phenyl, chlorine bonded to surface silicon atoms can be substituted by phenyl groups.Quantitative determinations show that for Aerosil the number of surface hydroxyl groups is lower than the maximum amount estimated for silica surfaces; their surface concentration varied for different batches.
    Notes: An Aerosil, einem feinteiligen amorphen Siliciumdioxyd-Präparat der Degussa, wurden Umsetzungen mit den an der Oberfläche gebundenen Hydroxylgruppen durchgeführt. Die Hydroxylgruppen reagieren mit Calciumhydroxyd; mit Alkoholen und mit Diazomethan lassen sie sich verestern. Bei der Einwirkung von Thionylchlorid werden sie durch Chlor ersetzt. Diese Reaktion ist zur quantitativen Bestimmung der an Siliciumdioxyd-Oberflächen gebundenen Hydroxylgruppen besonders gut geeignet.Bei der Umsetzung mit Lithiumphenyl wird das am Silicium gebundene Chlor seinerseits durch Phenylgruppen ersetzt.Die quantitative Verfolgung der Reaktionen ergab, daß das Aerosil nicht die maximal mögliche Zahl oberflächenständiger Hydroxylgruppen besitzt. Ihre Menge pro Flächeneinheit ist vom jeweils gelieferten Muster abhängig.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593010516
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  • 169
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    Bariumfluoroborat (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 301 (1959), S. 336-338 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Pure anhydrous Ba(BF4)2 has been prepared by interaction between BaF2 and BF3 · 2 H2O and purification of the crude reaction product by means of acetone.The solubilities of Ba(BF4)2 in H2O, acetone, methanol, and ethanol have been determined.
    Notes: Das reine wasserfreie Ba(BF4)2 wird durch Umsetzung von BaF2 mit BF3 · 2 H2O und Behandlung des entstandenen Rohsalzes mit Aceton gewonnen.Die Löslichkeit von Ba(BF4)2 in Wasser, Aceton, Methanol und Äthanol wird bestimmt.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593010517
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  • 170
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    Über die Hydrolyse des Antimon(V)-säureäthylesters (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 301 (1959), S. 339-342 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Sb(OC2H5)5 is hydrolized on action with ½ mol of water yielding the dimeric ester (C2H5O)4Sb—O—Sb(OC2H5)4. By larger quantities of water polymeric chains and net works are formed.
    Notes: Durch Hydrolyse von Sb(OC2H5)5 mit einem halben Mol Wasser entsteht die kondensierte Verbindung (C2H5O)4SbOSb(OC2H5)4. Größere Mengen an Wasser führen zu ketten förmigen und vernetzten Produkten.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593010518
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  • 171
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    Reaktionen und Gleichgewichte in Alkalihydroxydschmelzen. III. Peroxydgleichgewichte (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 298 (1959), S. 285-301 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The formation of alkali peroxides by reaction between molten alkali hydroxides and oxygen in the presence of water vapor at temperatures of 410 and 510°C has been investigated. Maximum yields of peroxides obtained in dry pure oxygen at 410°C are to be seen in „Inhaltsübersicht“.At definite low pressures of water vapor reproducible peroxide yields have been observed. From the dependence of equilibrium values from oxygen and water vapor pressures there is evidence that in molten NaOH mainly Na2O2 is formed, whereas in KOH, RbOH and CsOh the hyperoxides KO2, RbO2, and CsO2, respectively are the main reaction products.
    Notes: Es wurde das zur Bildung von Alkaliperoxyden führende Gleichgewicht zwischen Alkalihydroxydschmelzen und Sauerstoff in Gegenwart von Wasserdampf bei 410° und 510°C näher untersucht. In trockenem, reinem Sauerstoff wurden bei 410°C maximal folgende Mengen Peroxyd gebildet:.Während es sich bei diesen Zahlen um die in trockenem Sauerstoff, also bei undefiniertem Wasserdampfpartialdruck praktisch erreichbaren Höchstwerte handelt, stellen sich bei geringen Wasserdampfpartialdrucken gut reproduzierbare Gleichgewichte im Laufe von 6 - 15 Stunden ein. Identische Gleichgewichtswerte konnten auch von der anderen Seite her, ausgehend von KO2 erhalten werden.Die Abhängigkeit der Gleichgewichtswerte vom Sauerstoffpartialdruck und Wasserdampfpartialdruck wird an Hand logarithmischer Diagramme diskutiert. Man gelangt dabei zu dem Schluß, daß die NaOH-Schmelzen das Peroxyd Na2O2 gelöst enthalten, während bei den KOH-, RbOH- und CsOH-Schmelzen die Hyperoxyde KO2, RbO2 und CsO2 überwiegen.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19592980508
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    Zur Chemie der kondensierten Phosphate und Arsenate. XXII. Die Bedeutung der Kationen bei der Papierchromatographie der kondensierten Phosphate (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 298 (1959), S. 316-336 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: In paper chromatography of condensed phosphates in acid medium the presence of little quantities of ammonia is necessary. For the explanation of this fact, which was not previously understood, it has been shown that ammonia can be replaced by other monovalent cations. The dependence of chromatographic separation on the cation type and cation concentration has been, therefore, investigated. Furthermore, it has been demonstrated that cations migrate independent of the phosphate anions. However, the presence of cations is necessary in order to differentiate between the solubilities of condensed phosphates by virtue of their molecular weight and their constitution.
    Notes: Bei der Papierchromatographie kondensierter Phosphate in saurem Medium erwies sich die Anwesenheit kleiner Mengen von Ammoniak als notwendig. Zur Aufklärung dieser bisher unverstandenen Tatsache wird gezeigt, daß das Ammoniak durch andere einwertige Kationen ersetzt werden kann, die Trennwirkung in Abhängigkeit von Kationenart und -menge untersucht und außerdem nachgewiesen, daß die Kationen unabhängig von den Phosphatanionen wandern. Die Gegenwart der Kationen ist aber notwendig, um die Löslichkeit der kondensierten Phosphate in Abhängigkeit von ihrem Molekulargewicht und ihrer Konstitution zu differenzieren.
    Additional Material: 18 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19592980510
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    Professor Dr. phil. Otto Schmitz-DuMont (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 299 (1959), S. 1-2 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19592990102
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    Studies on the composition and properties of metal ferrocyanogen complexes. II. Physico-chemical studies on the Nature and Composition of Chromous Ferrocyanide (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 301 (1959), S. 350-354 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Die Rektion zwischen CrCl2 und K4Fe(CN)6 ist mittels potentiometrischer, konduktometrischer und amperometrischer Titrationen untersucht worden. Mit den ersten beiden Methoden wurde die Bildung von K2CrFe(CN)6 und Cr2Fe(CN)6 nachgewiesen; die amperometrische Titration gab nur Hinweise für die Existenz der ersteren Verbindung. Durch die Adsorptionsfähigkeit der Verbindungen entstehen Fehler, die in Gegenwart von Alkohol geringer sind als in rein wäßrigem Medium.
    Notes: Potentiometric, conductometric and amperometric titrations have been carried out between CrCl2 and K4Fe(CN)6 with varying concentrations of the reagents in aqueous and aqeous-alcoholic media. While evidence for the formation of both K2CrFe(CN)6 and Cr2Fe(CN)6 was obtained from the first two methods, the amperometric titrations gave evidence only for the formation of K2CrFe(CN)6. From the discrepancies in the titre values (theoretical and determined), evidence for the role of adsorption in influencing the composition is obtained. The titre values approach the theoretical when measurements are done in presence of alcohol.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593010520
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    Über Subchalkogenidphasen des Titans (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 302 (1959), S. 17-36 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The systems TiS—Ti, TiSe—Ti, and TiTe—Ti have been investigated by X-ray analysis.The range of homogeneity of the TiX-phases in all these systems extends to the composition of TiX0.8. In the systems TiS—Ti and TiSe—Ti, a Ti3X2-phase with a limit composition of TiX0.5 follows, whereas in the tellurium system a Ti2Te-phase (limit composition TiTe0.25) occurs. In the case of both TiSe and TiTe, a new hexagonal modification has been manifested; furthermore, the TiSe-phase crystallizes in a third lattice being trigonal. These new modifications are the stable forms of the phases TiSe and TiTe representing overstructures of the NiAs-type. The structures of other phases are: \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{l} {\rm Ti}_{\rm 3} {\rm S}_{\rm 2} \,\,{\rm WC - type;} \\ {\rm Ti}_{\rm 3} {\rm S}_{\rm 2} \,\,\,{\rm NiAs - type;} \\ {\rm Ti}_{\rm 2} {\rm Te}\,\,{\rm tetragonal}\,{\rm unknown}\,{\rm structure}{\rm.} \\ \end{array} $$\end{document}
    Notes: Es wurden die Systeme TiS/Ti, TiSe/Ti und TiTe/Ti röntgenographisch untersucht. Der Homogenitätsbereich der TiX-Phasen erstreckt sich in allen Systemen etwa bis zur Zusammensetzung TiX0,8. In den Systemen TiS/Ti und TiSe/Ti folgt eine Ti3X2-Phase mit einem Homogenitätsbereich bis zur Zusammensetzung TiX0,5, in dem System TiTe/Ti eine Ti2Te-Phase mit einem Homogenitätsbereich bis zur Zusammensetzung TiTe0,25. Die Löslichkeit der Chalkogene im Titanmetall nimmt zum Tellur hin stark ab.Bei der TiSe- und TiTe-Phase wurde außer der bereits bekannten NiAs-Form eine weitere hexagonal kristallisierende Modifikation festgestellt, bei der TiSe-Phase noch eine dritte trigonal kristallisierende. Beide neu gefundenen Modifikationen sind die stabilen Formen dieser Phasen und stellen Überstrukturen des NiAs-Typs dar. Die Ti3S2-Phase kristallisiert im WC-Typ, die Ti3Se2-Phase im NiAs-Typ und die Ti2Te-Phase in einer tetragonalen Struktur unbekannten Typs.
    Additional Material: 3 Ill.
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    URL: http://dx.doi.org/10.1002/zaac.19593020104
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    Über die Bildung salzartiger Verbindungen bei der Umsetzung von Antimon(V)-chlorid mit Äthylat (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 302 (1959), S. 88-102 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On reaction of SbCl5 with NaOC2H5 salt-like compounds with cation co-ordination number 4 and anion co-ordination number 6 are formed: [SbCla(OC2H5)4-a] [SbClb(OC2H5)6-b]. In polar solvents these substances show electrolytical conductivity and their molecular weights in dilute solution prove complete dissociation into two particles. In nonpolar solvents the compounds are also dissolved but now in a molecular form SbClc(OC2H5)5-c. The latter solutions have no electrolytical conductivity. IR-spectra of the compounds in polar and nonpolar solutions are different from each other.
    Notes: Bei der Umsetzung von SbCl5 mit NaOC2H5 entstehen heteropolare Verbindungen mit 4fach koordiniertem Kation und 6fach koordiniertem Anion: [SbCla(OC2H5)4-a] [SbClb(OC2H5)6-b]. In polaren Lösungsmitteln zeigen diese Substanzen elektrolytische Leitfähigkeit und Molekulargewichte, die in verdünnter Lösung auf vollständige Dissoziation schließen lassen. In unpolaren Lösungsmitteln sind die Verbindungen in homöopolarer Form SbClc(OC2H5)5-c gelöst. Diese Lösungen zeigen nur sehr geringe Leitfähigkeit. Die Infrarotspektren der Verbindungen in polaren und unpolaren Lösungen unterscheiden sich stark voneinander.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593020109
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    Masthead (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 302 (1959) 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593020301
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  • 178
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    Bildungswärme von La2O3 und La(OH)3 (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 299 (1959), S. 227-231 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The heat of reaction 2 La + 1,5 O2 = La2O3 was determined to 446 ± 2 kcal/Mol by measuring the heats of solution of La2O3 in 0,1 n HCl and comparing it with the heat of solution of La in 0,1 n HCl by BOMMER and HOHMANN. The older values of the heat of combustion were discussed and the mistake of the extreme value of Roth cleared up.The heat of hydratation 1/2 La2O3 + 1,5 H2O = La(OH)3 was determined to 20,2 ± 0,7 kcal/Mol by measuring the heat of solution of cristallised La(OH)3 in 0,1 n HCl.
    Notes: Die Bildungswärme von La2O3 wurde durch vergleichende Messung der Lösungswärmen von La2O3 und La in 0,1 n HCl zu 446 ± 2 kcal/Mol bestimmt und mit drei älteren direkten Messungen der Verbrennungswärme verglichen. Bei dem abnorm hohen Wert von ROTH (539) wurde eine Fehlerquelle nachgewiesen.Die Hydratisierungswärmen von La2O3 wurde durch vergleichende Messung der Lösungswärme von krist. La(OH)3 und La3O2 zu 20,2 ± 0,7 kcal/Mol bestimmt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19592990316
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    Bildung siliciumorganischer Verbindungen. VI. Darstellung ringförmiger Siliciummethylenverbindungen (Cyclocarbosilane) aus Si(CH3)4 (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 299 (1959), S. 232-240 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 1. Higher molecular siliconmethylene compounds have been prepared by thermic decomposition of Si(CH3)4. The composition of the reaction mixture relies on their stay period in the reaction tube. The experimental conditions of the forming of higher boiling and meltable silmethylene compounds are described.2. A number of compounds have been isolated from the reaction mixture, see „Inhaltsübersicht“. The common structure of the compounds has been found to consist of sixmembered rings which have a skeleton of alternate silicon and carbon atoms.
    Notes: 1. Aus Si(CH3)4 lassen sich durch thermische Zersetzung höhermolekulare Siliciummethylenverbindungen darstellen. Die Zusammensetzung der Reaktionsprodukte ist von ihrer Verweilzeit im Reaktionsgefäß abhängig. Es werden die experimentellen Bedingungen zur Darstellung höhersiedender und schmelzbarer Siliciummethylenverbindungen angegeben.2. Es wurden folgende Verbindungen aus dem Reaktionsgemisch isoliert. Si2C6H18, Si2C7H20, Si3C8H22, Si3C9H24, Si4C10H26, Si4C11H28, Si5C13H34, Si6C14H36, Si7C18H46, Si8C20H50, Si8C24H66, Si9C27H74. Die Si-Atome sind stets über je ein C-Atom verbunden. Das Gemeinsame im Aufbau der Verbindungen mit 3 und mehr Si-Atomen besteht darin, daß sie aus Sechsringen mit drei Si- und drei C-Atomen bestehen, die im Ring abwechselnd angeordnet sind.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19592990317
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  • 180
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    Geschmolzenes Antimon (III)-chlorid alsionisierendes„wasserähnliches“ Lösungsmittel. I (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 299 (1959), S. 252-270 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Fused antimony(III) chloride is a „water-like“ ionizing solvent for a considerable number of organic and inorganic compounds, especially for convalent ones.The specific conductivity of fused SbCl3 (in the range of 10-6 [Ohm-1 cm-1]) is increased by solving electrolytes. The proposed self-dissociation, (x + 1) SbCl3 ⇌ SbCl2+ + Cl- · x SbCl3, is discussed in regard to acid-base problems.The preparations of crystalline addition compounds are described.
    Notes: Das geschmolzene Antimon(III)-chlorid wird als ionisierendes Lösungsmittel in den Kreis der Solventien mit gewissen „wasserähnlichen“ Eigenschaften eingereiht.Es zeigt ein gutes Lösungsvermögen für viele organische Verbindungen. Von anorganischen Verbindungen ist ebenfalls eine beträchtliche Anzahl löslich; einige Salzgruppen sind weitgehend unlöslich.Kristallisierte Solvate sind sowohl von organischen als auch von anorganischen Verbindungen erhältlich. Eine Solvatation dieser Verbindungen in Lösung ist ebenfalls anzunehmen.Die elektrische Eigenleitfähigkeit des geschmolzenen Antimon(III)-chlorides in der Größenordnung von 10-6 Ohm-1 · cm-1 und der Anstieg der spezifischen Leitfähigkeit beim Auflösen von Elektrolyten in der Schmelze sowie der Verlauf dieser Leitfähigkeitskurven zeigen ein „wasserähnliches“ Verhalten des Solvens SbCl3 an. Die Eigenleitfähigkeit der Verbindung SbCl3 in geschmolzenem Zustande wird auf das folgende Dissoziationsschema zurückgeführt: (x + 1) SbCl3 ⇌ SbCl2+ + Cl- · x SbCl3.Danach sind, in Analogie zum Lösungsmittel Wasser, Verbindungen, die in Lösung die Konzentration der SbCl2+-Ionen erhöhen, Säurenanaloge; Verbindungen, welche die Konzentration der Cl--Ionen erhöhen, sind Basenanaloge. Das Verhalten solcher Verbindungen in geschmolzenem SbCl3 wird durch Leitfähigkeitsmessungen und kryoskopische Messungen untersucht.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19592990503
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  • 181
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    Oxydation von Phosphordampf mit Sauerstoff in Wasserdampfatmosphäre (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 300 (1959), S. 261-274 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: An orange yellow substance the phosphorus content of which varies form 87 to 91 per cent is formed by oxidizing phosphorus vapour by atmospheric oxygen in the presence of water vapour. The compositions of the products with the lowest phosphorus content closely correspond to the formula P4nOnHn. Because of its insolubility in all common solvents and the chemical behaviour, the amorphous yellow solid is supposed to consist of a polymeric network of P-atoms to which OH-groups are fixed.When heated to 250-300°C in inert gas atmosphere the substance is decomposed to P(V)-compounds and products similar to red phosphorus. At normal atmosphere conditions it is slowly oxidized to H3PO2, H3PO3, and small amounts of H3PO4. In addition to PH3 and H2, the same hydroxy-acids are formed by treating the substance with cold N NaOH. Complete oxidation is achieved in aqueous suspension by means of hypoiodite yielding among others considerable amounts of the same very slightly soluble alkali“ ts of an acid of lower-valent phosphorus recently described by Blaser
    Notes: Bei der Oxydation von Phosphordampf mit Luftsauerstoff bildet sich in Gegenwart von Wasserdampf ein orangegelbes Produkt, dessen Phosphorgehalt zwischen 87 und 91% schwankt. Die Zusammensetzung der Produkte mit dem niedrigsten Phosphorgehalt kommt der Formel P4nOnHn nahe. Die Eigenschaften dieser Substanz wurden untersucht und mit denen des roten und des Schenckschen Phosphors verglichen. Auf Grund des physikalischen und chemischen Verhaltens wird vermutet, daß der erhaltene gelbe Stoff aus einem polymeren Netzwerk von Phosphoratomen aufgebaut ist, an welche OH-Gruppen gebunden sind.Die dargestellte Substanz ist amorph und in allen gebräuchlichen Lösungsmitteln unlöslich. Sie zersetzt sich bereits langsam an der Luft unter Oxydation zu H3PO2, H3PO3 und wenig H3PO4. Beim Erhitzen unter Inertgas auf 250 - 300°C zerfällt sie in P(V)-Verbb. und Produkte mit Phosphorgehalten über 90%, die mit steigendem P-Gehalt dem roten Phosphor immer ähnlicher werden. Behandeln der Substanz mit 1 n NaOH führt zur Zersetzung, wobei PH3, H2, H3PO2, H3PO3 und wenig H3PO4 gebildet werden. Durch Hypojodit erfolgt in wäßriger Aufschlämmung vollständige Oxydation, wobei unter anderem in beträchtlicher Menge schwerlösliche Alkalisalze einer Säure des Phosphors mit niederwertigem Phosphor gebildet werden. Diese Salze sind identisch mit den kürzlich von Blaser1) bei der Oxydation von rotem Phosphor mit Brom in alkalischem Medium erhaltenen Verbindungen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593000506
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    Zur Kenntnis der Basenreaktion des Chromhexacarbonyls (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 300 (1959), S. 288-294 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: According to recent investigations binuclear complexes are formed on treating chromium carbonyl with alkali. Methanolic alkali hydroxide leads to a product containing methoxyl groups, whereas with ethanolic alkaline solutions the alcohol-free K2[(CO)3Cr(OH)3Cr(CO)3H] is produced. The proposed structure is consistent with conductivity and magnetic measurements, potentiometric titrations in aqueous and non-aqueous solvents, as well as with its chemical behaviour. Former interpretations have to be corrected according to this paper.
    Notes: Nach neueren Untersuchungen entstehen bei der Basenreaktion des Chromhexacarbonyls 2 kernige Komplexe. Im methanol-alkalischen System erhält man ein methoxylhaltiges Produkt, während in Äthanol-Alkalilauge ein alkohol-freies Dikalium-hydrogen-hexacarbonyl-m̈-triol-dichromat(0), K2[(OC)3Cr(OH)3Cr(CO)3H], gebildet wird. Die Konstitution dieser Verbindungen wurde durch Leitfähigkeit, chemisches Verhalten, IR-Spektren und magnetische Messungen, sowie durch Titration in wäßrigem und wasserfreiem Medium gestützt. Eine frühere Formulierung für das Basenreaktions-produkt ist entsprechend zu revidieren.Mit Äthylendiaminhydrat erhält man aus den 2 kernigen Chromtricarbonyl-Verbindungen eine Substanz vom Tricarbonyltriammin-Typ.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593000508
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  • 183
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    Über Eisencarbonylverbindungen mit Elementen der 3. bis 5. Hauptgruppe (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 300 (1959), S. 275-287 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: [Fe(CO)4]2- reacts with compounds of arsenic, anitmony, and bismuth producing non-ionogenic iron carbonyl compounds, such as As2Fe3(CO)11, SbFe2(CO)8, and Bi2Fe5(CO)20. Similar reactions with tin, lead and thallium salts lead to the following intensively coloured complexes Sn2Fe5(CO)20, PbFe3(CO)12 and Tl2Fe3(CO)12.On the basis of infrared and magnetic susceptibility measurements the configuration of the compounds mentioned above is discussed. Linear structures result for the paramagnetic As2Fe3(CO)12 and SbFe(CO)8, whereas for the other compounds a centric configuration is proposed.
    Notes: Mit Verbindungen des Arsens, Antimons und Wismuts, vorwiegend in ihrer dreiwertigen Form, reagiert Tetracarbonylferrat unter Bildung nichtionogener Eisencarbonyl-verbindungen verschiedenartigen Bautyps, nämlich As2Fe3(CO)11, SbFe2(CO)8, SbFe(CO)4 sowie Bi2Fe5(CO)20. Entsprechende Umsetzungen mit Zinn-, Blei- und Thalliumsalz-Lösungen führen zu den tieffarbigen Komplexen Sn2Fe5(CO)20, PbFe3(CO)12 und Tl2Fe3(CO)12. Die in polaren Solventien gut löslichen Substanzen sind thermisch wie gegenüber Oxydationsmitteln wesentlich empfindlicher als die Eisencarbonylchalkogenide.Auf Grund IR-spektroskopischer und magnetischer Untersuchungen werden Strukturfragen erörtert. Lediglich die Verbindungen As2Fe3(CO)11 (I) und SbFe2(CO)8 (II) sind paramagnetisch; das „μ pro As“ von I stimmt mit dem μ von II überein. Daraus ergeben sich lineare Strukturen, während in anderen Fällen, wie bei der Bi-oder Sn-Ver-bindung, auch eine mehr zentrische Konstitution - in jedem Fall mit endständigen CO-Gruppen - zu diskutieren ist.
    Additional Material: 3 Ill.
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    URL: http://dx.doi.org/10.1002/zaac.19593000507
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    Die Basenreaktionen der Hexacarbonyle der Chromgruppe. III. Die Basenreaktion des Wolframhexacarbonyls (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 300 (1959), S. 304-310 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The reaction of tungsten carbonyl with alkali leads to the formation of an anion, the tungsten atoms being partially reduced and carrying a formal negative charge. With methanolic alkali a mixture of [W2(CO)6(OH)2(CH 3OH)2]2- and [W2(CO)6(OH)2(CH 3OH)2]1- results at 100° C, whereas at 130° C [w3(CO)9(OH)(OCH3)(CH3OH)]3- is formed. With ethanolic potassium hydroxide, however, at 100° C and above the corresponding alcohol free products result.
    Notes: Zum Unterschied von den bereits eingehend untersuchten Reaktionen des Chrom-, Molybdän- und Rheniumcarbonyls mit Alkalihydroxyd, die zu Reaktionsprodukten mit der Oxydationsstufe 0 oder +1 des Carbonylmetalls führen, hat man es bei den entsprechenden Reaktionen des Wolframcarbonyls mit einer teilweisen Reduktion unter Bildung eines Anions zu tun, in dem den Wolframatomen ein negativer Oxydationswert zukommt. Während bei 100° aus Methanol/KOH ein Gemisch von Hexacarbonyl-m̈-diol-dimethanol-diwolframat(0) und (-II) entsteht, bilden sich bei 130° im gleichen System 3kernige Enneacarbonyltriwolframate mit komplex gebundenem Methanol. Äthanol/Kalilauge reagiert hingegen mit W(CO)6 bei 100° und bei höherer Temperatur unter Bildung der gleichen 2kernigen alkoholfreien Verbindung. Aus den Lösungen der 2kernigen Basenreaktionsprodukte läßt sich das Wolfram(0) in Form des Tricarbonyltriammin wolframs nahezu quantitativ ausfällen.
    Additional Material: 1 Tab.
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    URL: http://dx.doi.org/10.1002/zaac.19593000510
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    Die Basenreaktionen der Hexacarbonyle der Chromgruppe. II. Über die Basenreaktion des Molybdänhexacarbonyls (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 300 (1959), S. 295-303 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On treating molybdenum carbonyl with alcoholic KOH at higher temperatures binuclear hexacarbonyl-m̈-triol-dimolybdates(0) are formed. Using methanolic potassium hydroxide one of the OH groups is substituted by OCH3. Contrary to chromium carbonyl in this typical substitution reaction no hydrogen is evolved; carbon monoxide is converted into formiate. Precipitation, conductivity, infrared spectra, diamagnetism, and potentiometric titration are in agreement with the proposed structure of the binuclear complex.[Mo2(CO)6(OH)3H3] results by reaction of the m̈-triol-compound with two equivalents of acid. This hydride being a strong acid in aqueous solution forms secondary salts with potassium- and tetramethylammonium hydroxide. Complexing agents such as triphenylphosphine and- arsine or dimethylsulfoxide react with the hydride under formation of the corresponding tri-substitution products.
    Notes: Die Basenreaktion des Molybdänhexacarbonyls führt unter Verwendung von alkoholischen Kalilaugen bei höherer Temperatur zu 2kernigen Hexacarbonyl-m̈-trioldimolybdaten(0), wobei im Falle des aus Methanol anfallenden Produktes eine OH-Gruppe durch OCH3 ersetzt ist. Die Reaktion spielt sich zum Unterschied von derjenigen des Cr(CO)6 ohne Wasserstoffentbindung ab und stellt somit eine reine Substitutionsreaktion dar; das CO reagiert wiederum unter Formiatbildung. Durch Fällungsreaktionen, Leitfähigkeit, IR-Spektren, Diamagnetismus und Titration wird die Struktur der 2kernigen Komplexe, die mit wäßrigem NH3 und Aminen nichtionogene Verbindungen vom Tricarbonyltriammin-Typ liefern, sichergestellt.Durch Umsetzungen der alkoholfreien m̈-Triolverbindung mit dem doppelten Säureäquivalent gewinnt man ein Trihydrogen-hexacarbonyl-m̈-triol-dimolybdän(0), das in wäßriger Lösung als starke Säure fungiert und ein Dikalium- sowie ein Bis-[tetramethylammonium]-salz zu bilden vermag. Komplexbildner, wie Triphenylphosphin, -arsin und Dimethylsulfoxyd reagieren mit dem Hydrid unter Bildung der entsprechenden Trisubstitutionsprodukte, Mo(CO)3X3, mit Triphenylphosphinoxyd entsteht nur noch die Verbindung mit 1 Mol Basenoxyd, Mo(CO)3OPR3.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593000509
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    Die Änderung der Oberflächengröße bei Reaktionen pulverförmiger Komponenten im festen Zustand (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 301 (1959), S. 1-6 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The alterations of surface during double decompositions in solid state and spinel formation have been investigated by means of the BET-method.
    Notes: Die Veränderungen der Oberfläche im Verlauf der doppelten Umsetzung im festen Zustand und der Doppeloxydbildung wurden durch die Bestimmung der Oberflächengröße mittels physikalischer Adsorption (BET-Methode) untersucht.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593010102
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    Über fluorhaltige Verbindungen der Elemente der V. Hauptgruppe. X. Über kondensierte Fluoroarsenate (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 301 (1959), S. 36-53 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: K[AsF5OH] and K[AsF4(OH)2] are thermally decomposed yielding chain-like and net-like polyfluoroarsenates, respectively, by exclusive liberation of HF. The decompositions are discussed in regard to hydrogen bonds between OH-groups and F-atoms in the starting salts.Polymeric fluoroarsenates are very slowly hydrolyzed even in boiling 0.1 n KOH. The fluorine atoms linked to arsenic are hindering the hydrolytic cleavage of As—O—As-bonds. The hydrolysis has been investigated titrimetrically and by paper chromatography using 76As as radioactive indicator.The salts K[AsF4(OH)2], K[AsF5(OH)], and K[AsF6] are not isomorphous because of differing or lacking systems of hydrogen bonds.
    Notes: Bei der thermischen Behandlung gehen die Salze K[AsF5OH] und K[AsF4(OH)2] unter praktisch ausschließlicher HF-Abspaltung in kettenförmige bzw. überwiegend flächenförmig vernetzte Polyfluoroarsenate über. Die Reaktion wird zurückgeführt auf die in den Kristallen vorhandenen Wasserstoffbrückenbindungen zwischen OH-Gruppen und F-Atomen. Infolge verschiedener bzw. fehlender Wasserstoffbrückenbindungssysteme sind die Salze K[AsF4(OH)2], K[AsF5OH] und K[AsF6] nicht miteinander isomorph. Polymere Fluoroarsenate hydrolysieren selbst in siedender Lauge nur langsam. Fluoratome am Arsen schirmen die As—O—As-Bindungen gegenüber hydrolytischen Einflüssen wirksam ab. Die Hydrolyse der Polyfluoroarsenate wurde titrimetrisch und papierchromatographisch unter Zuhilfenahme von 76As untersucht.
    Additional Material: 17 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593010105
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  • 188
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    Masthead (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 298 (1959) 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19592980301
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  • 189
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    Über die Tribolumineszenz des ArsenolithsHerrn Professor B. Rajewsky zum 65. Geburtstag gewidmet (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 298 (1959), S. 116-120 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The influence of crystallisation conditions upon the temporary triboluminescence of Arsenoliths has been examined.The experimental results show increasing activity of triboluminescence with decreasing velocity of growth and increasing temperature of growth respectively. This can be explained by assuming a concentration dependent formation of claudetite or hydroxyl within the crystal during the growth process.
    Notes: Es wird der Einfluß von Kristallisationsbedingungen auf die temporäre Tribolumineszenz des Arsenoliths untersucht. Die Versuchsergebnisse (zunehmende Tribolumineszenz-Aktivität mit abnehmender Wachstumsgeschwindigkeit und zunehmender Wachstumstemperatur) lassen sich an Hand eines konzentrationsbedingten Einbaus von claudetit-artigen Bereichen oder OH-Gruppen im Kristall deuten.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19592980115
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  • 190
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    Spektroskopische Untersuchungen an Siliciumverbindungen. V. Das Schwingungsspektrum des Trisilylamins (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 298 (1959), S. 212-222 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The infrared and Raman-Spectra of (H3Si)3N are reported and the frequencies are assigned as for as possible. The valence force constant of the Si—N-bond is calculated to 4,1 mdyn/Å from the frequencies of the skeletal ≡Si3N. From this value it is seen, that the Si—N-bonds are inforced because the lone pair of electrons is involved. This strengthening of the bonds and the character of the whole spectrum make probable a planar or nearplanar structure of the ≡Si3N-skeletal.
    Notes: Das IR- und Raman-Spektrum des (H3Si)3N wird mitgeteilt; die Frequenzen wurden soweit als möglich den einzelnen Schwingungsformen zugeordnet. Aus den Frequenzen des Gerüstes ≡ Si3N wird die Valenzkraftkonstante für die Si—N-Bindung zu 4,1 mdyn/Å berechnet. Dieser Wert zeigt, daß die Si—N-Bindungen durch die Einbeziehung des freien Elektronenpaares am Stickstoff verstärkt sind. Diese Bindungsverstärkung und der allgemeine spektrale Habitus sprechen für eine ebene oder fast ebene Struktur des ≡Si3—N-Gerüstes.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19592980312
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  • 191
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    Electronic Resource
    Masthead (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 298 (1959) 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19592980501
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  • 192
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    On the Polymorphism of Calcium Carbide (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 298 (1959), S. 255-257 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Es wird dargelegt, daß die Vermutung einer fünften Modifikation des CaC2 auf einer irrtümlichen Deutung der Röntgenaufnahmen beruht. Angaben der Literatur über das Molekularvolumen von Kupferacetylid werden angezweifelt.
    Notes: A brief review of the literature is given. It is demonstrated that a recent suggestion regarding the alleged existence of a fifth crystal modification of calcium carbide was based on an erroneous interpretation of an X-ray pattern. Doubt is also expressed as to a suggested molar volume for cuprous acetylide.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19592980503
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  • 193
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    Darstellung und thermogravimetrische Untersuchung einer neuen Tellur - Brenzcatechin-Verbindung (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 299 (1959), S. 292-296 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Telluric acid reacts with pyrocatechol both in aqueous solution and, partially, in fused state forming a very difficultly soluble Te(IV)-compound the structure of which, Te , has been confirmed by thermogravimetric and IR-spectrometric investigations.
    Notes: Es wird gezeigt, daß Tellursäure mit Brenzcatechin in wäßriger Lösung eine sehr schwer lösliche, kristallisierbare Te(IV)-Verbindung bildet, die nach thermogravimetrischen Untersuchungen die Struktur Te besitzt. Die thermischen Zersetzungsreaktionen dieser Verbindung werden diskutiert. Das IR-Spektrum des Chelates wird mit den Spektren des Brenzcatechins und der Tellursäure verglichen. Ferner werden die thermogravimetrischen Kurven von Tellursäure und Brenzcatechin dargestellt. Es konnte weiterhin thermogravimetrisch beobachtet werden, daß Tellursäure und Brenzcatechin auch in der Schmelze miteinander reagieren und geringe Mengen der erwähnten Te(IV)-Verbindung bilden.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19592990506
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  • 194
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    Beitrag zur Untersuchung des Charakters der Umwandlung des weißen Phosphors in seine schwarze Modifikation (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 299 (1959), S. 297-301 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: After exposing white phosphorus to a pressure of 26000 kg/cm2 at room temperature for 33 days, the transition point for the conversion into black phosphorus at the same pressure is lowered from 158 to 142° C. By analogous preliminary treatment at about -43° C no depression is achieved.The effect of depression is discussed in regard to formation of crystallization nuclei.
    Notes: Nach den Untersuchungen über Druck-Temperaturumwandlungen des weißen Phosphors in schwarzen(1) wird die Frage nach dem Charakter dieser Umwandlung angeschnitten.Unter Benutzung einer Druckapparatur, die wochenlange Belastung mit 26000 kgcm-2 im Temperaturbereich von -40° bis -50° C ermöglicht, wird folgendes festgestellt:Der mit 26000 kgcm-2 während 33 Tagen im genannten tiefen Temperaturbereich belastete weiße Phosphor zeigt bei nachfolgender Aufheizung gegenüber einem nicht vorbehandelten Präparat keine Erniedrigung der Umwandlungstemperatur.Das unter Zimmertemperatur bei gleichem Druck 33 Tage lang vorbehandelte Material zeigt bei anschließender Aufheizung der Matrize eine Erniedrigung des Umwandlungspunktes um 15 Celsiusgrade. Somit ist eine Keimbildung in Richtung der schwarzen Modifikation innerhalb der Vorbehandlungszeit bei Zimmertemperatur anzunehmen, die bei der tiefen Temperatur nicht stattfindet.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19592990507
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  • 195
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    Absorptionsspektren und Reinheitsprüfung einiger Cyclocarbosilane (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 299 (1959), S. 316-321 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The absorption spectra of some cyclocarbosilanes have been measured in the range from 1000 to 200 mμ. Increasing molecular weight of the silicon compounds causes a steady shift of the absorption spectra to longer wave lengths. The colour of the silicon compounds is not effected by coloured organic impurities. It is a property of the substances.The solutions of the silicon compounds do not show the Tyndall effect.
    Notes: Es werden die Absorptionsspektren einiger Cyclocarbosilane im Bereich von 1000 bis 220 mμ gemessen. Mit steigendem Molekulargewicht der Siliciumverbindungen tritt eine gleichmäßige Verschiebung des Absorptionsspektrums zum längerwelligen Gebiet hin auf. Die Farbe der Siliciumverbindungen ist nicht durch farbgebende organische Verunreinigungen bedingt. Sie ist ein substanzeigenes Merkmal.Die Lösungen der Siliciumverbindungen zeigen keinen TYNDALL-Effekt.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19592990509
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  • 196
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    Bildung siliciumorganischer Verbindungen. VII. Untersuchungen zur Konstitution der Cyclocarbosilane Si7C18H46, Si8C20H50 und Si4C11H28 (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 299 (1959), S. 302-315 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 1. The hydrolysis of the Si-H group of Si7C18H46 has been investigated in alkali. The Si-H group of these compounds cannot be hydrolysed under normal conditions. This is due to steric effects. The behaviour of the Si-H group confirms the proposed structure.2. The Si-H group of Si7C18H46 can be transformed into a Si-Cl group by photochemical chlorination. Si7C18Cl16H30 is formed. The basic structure of Si7C18H46 is left intact. The chlorine which can be hydrolysed in acid solution corresponds to one Si-Cl bond or to one Si-H bond, respectively, in the compound Si7C18H46.The degree of chlorination which is represented by the compound Si7C18Cl16H30, is favored. IF the time of chlorination is increased from five to nine hours no further chlorine is absorbed. This is due to steric effects. The chlorination of Si7C18H46 gives evidence to the structure of Si7C18H46.3. The results of a cristallographic investigation of Si4Cl11H28 are discussed in connection with the structural formula.
    Notes: 1. Es wird die Hydrolyse der Si-H-Gruppe im Si7C18H46 und Si8C20H50 im alkalischen Medium untersucht. Die Si-H-Gruppe in diesen Verbindungen ist aus sterischen Gründen unter normalen Bedingungen der Hydrolyse nicht zugänglich. Das Verhalten der Si-H-Gruppe bestätigt die angegebene Strukturformel.2. Die Si-H-Gruppe im Si7C18H46 läßt sich über eine Photochlorierung in die Si-Cl. Gruppe überführen. Es bildet sich Si7C18Cl16H46 bleibt erhalten. Das im Si7C18Cl16H30 in saurer Lösung abspaltbare Chlor entspricht einer Si-Cl-Bindung und damit einer Si-H-Bindung im Si7C18H46.Die Chlorierungsstufe im Si7C18CL16H30 ist bevorzugt; denn eine Erhöhung der Chlorierungsdauer von 5 auf 9 Stunden bedingt keine weitere Chloraufnahme. Das ist sterisch bedingt. Die Chlorierung des Si7C18H46 ermöglicht Aussagen über die Strukturformel des Si7C18H46.3. Es werden die Ergebnisse der kristallographischen Untersuchung am Si4C11H28 im Zusammenhang mit der Strukturformel diskutiert.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19592990508
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  • 197
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    Studies on the behaviour of cuprous chloride in hydrochloric acid and potassium chloride solutions. I. Chemical analysis in the aqueous phase (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 299 (1959), S. 322-327 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Es werden die Ergebnisse von Untersuchungen über die Komplexbildung zwischen CuCl und HCl bzw. KCl in Lösung und im Bodenkörper mitgeteilt. Zur Konzentrationsbestimmung der Komponenten im Bodenkörper wird eine indirekte Methode benutzt. Im System CuCl—HCl liegen in Lösung die Komplexe H2CuCl3 und H3CuCl4 vor, analoge Komplexe finden sich in Lösung im System CuCl—KCl, während im Bodenkörper KCuCl2 und K2CuCl2 vorliegen.
    Notes: Investigations have been carried out to determine the complex ion formation between cuprous chloride and hydrochloric acid and cuprous chloride and potassium chloride in the aqueous and solid phase. An indirect method to determine the concentration of the components in the solid phase was employed due to the highly oxidisable nature of cuprous ions. Rectangular curves were drawn. In the case of hydrochloric acid, complexes like H2CuCl3 and H3CuCl4 are formed in the liquid phase while H2CuCl3; H3CuCl4 are formed in the solid phase. For potassium chloride, complexes like K3CuCl4 and K2CuCl3 were found to exist in the aqueous phase and KCuCl2 and K2CuCl3 were obtained in the solid phase. The amount of cuprous chloride going into solution with increasing amount of KCl was found to be lesser for HCl under identical conditions.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19592990510
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  • 198
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    Maßanalytische und gewichtsanalytische Untersuchungen an Kobaltpulver (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 299 (1959), S. 338-340 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A manganometric method for the determination of cobalt in commercial cobalt powder has been elaborated and checked by gravimetric methods.
    Notes: Eine früher beschriebene(1) maßanalytische Methode wurde auf Kobaltpulver angewendet, das einige Schwierigkeiten bietet. Durch gewichtsanalytische Bestimmungen einerseits durch Reduktion, andererseits durch Oxydation der Pulver wurde ein Vergleich geschaffen.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19592990512
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  • 199
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    Complex Chromic Fluoberyllates. I (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 300 (1959), S. 102-108 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Fluoroberyllate und saure Fluoroberyllate des dreiwertigen Chroms konnten dargestellt werden, sie sind den entsprechenden Alaunen ähnlich. Diese Fluoroberyllate sind violett gefärbt, es bilden sich jedoch rasch, vor allem bei erhöhter Temperatur, grün gefärbte Komplexe. Entsprechende Verbindungen des Aluminiums oder Eisens konnten nicht dargestellt werden, da diese Ionen sehr beständige komplexe Fluoride bilden.
    Notes: The present investigation has been successful in the preparation of trivalent complex chromic fluoberyllate. The preparation and properties of an acid chromic fluoberyllate alum and its dehydrated product acid chromic fluoberyllate dihydrate together with a violet rubidium chromium alum, analogous to corresponding sulphate compounds have been studied. The main difficulty encountered in the preparation of fluoberyllates of other trivalent elements was due to unique stability of the complex fluorides of the said trivalent metals. The fluoberyllate alums of the chromium are violet in colour, but it rapidly changes to green with time and also with the increase in temperature.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593000111
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  • 200
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    Fluoberyllates and their Analogy with Sulphates. XII. Complex Compounds of Zinc and Cadmium Fluoberyllate with Organic Bases (1959)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 300 (1959), S. 109-112 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Durch Umsatz von Äthylendiamin, Propylendiamin und Hexamethylentetramin mit Zink- bzw. Cadmium-Fluoroberyllat konnten die komplexen Fluoberyllate mit diesen organischen Basen als Liganden dargestellt werden. Die Eigenschaften dieser Verbindungen sind denen der entsprechenden komplexen Sulfate ähnlich.
    Notes: A few complex compounds of zinc and cadmium fluoberyllates with organic base were prepared. [Zn en3]BeF4 and [Cd en3]BeF4 were prepared by the addition of a concentrated solution of ethylenediamine to the concentrated solution of metal fluoberyllates. [Zn pn3]BeF4 was also isolated. The corresponding cadmium compound, however could not be prepared. ZnBeF4, C6H12N4, 8 H2O and CdBeF4, C6H12N4, 8 H2O were also prepared by following similar methods. In chemical compositions and also in their chemical properties these compounds resembles the corresponding sulphate compounds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19593000112
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