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  • 1985-1989
  • 1965-1969  (1,012)
  • 1966  (1,012)
  • Organic Chemistry  (614)
  • Physics  (398)
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Material
Years
  • 1985-1989
  • 1965-1969  (1,012)
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Membrane characterization by measurement of transient osmotic pressures (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 659-662 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040410
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  • 2
    Electronic Resource
    Electronic Resource
    Crystallographic studies of nylon 4. I. Determination of the crystal structure of the α polymorph of nylon 4Paper presented at the First Middle Atlantic Regional Meeting of the American Chemical Society, Philadelphia, February 4, 1966. (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 899-911 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The crystal structure of the α polymorph of nylon 4 has been determined from the x-ray diffraction patterns of uniaxially oriented monofilaments. In general the crystal structure of α nylon 4 is similar to that of α nylon 6. The unit cell is monoclinic with the following dimensions: a = 9.29 ± 0.05 A., b = 12.24 ± 0.05 A., c = 7.97 ± 0.05 A., and β = 114.5 ± 1.0°. There are eight monomeric units in the unit cell. The theoretical density is 1.37 g./cc. and the observed density 1.25 g./cc. The space group is P21. The nylon 4 chains are of the extended planar zigzag type, with the plane of the zigzag approximately parallel to the a axis of the unit cell. Along the a axis, every other chain is inverted - an antiparallel arrangement of chains - thus permitting complete hydrogen bonding and the formation of sheets of nylon 4 chains. Along the c axis of the unit cell, the second sheet is displaced by3/10 of the b axis, thus leading to a staggered arrangement of sheets. The sheets are held in place by van der Waals forces.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040606
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  • 3
    Electronic Resource
    Electronic Resource
    Narrow molecular weight distribution poly(styrenesulfonic acid). Part I. Preparation, solution properties, and phase separation (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 599-610 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A method is described for the conversion of polystyrene to poly(styrenesulfonic acid) without change in the molecular weight distribution; the reaction is performed at room temperature in 100% H2SO4 and uses Ag+ catalyst. The resulting polyelectrolyte has solubility and other characteristics significantly different from those of previously investigated poly(vinylsulfonic acid). This permits a study of the influence of the aromatic group on the local and long range interactions in solution. The barium salt of poly(styrenesulfonic acid) is unusual in showing both upper and lower consolute temperatures in solution.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040405
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  • 4
    Electronic Resource
    Electronic Resource
    Epitaxial crystallization of homopolymers on single crystals of alkali halides (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 611-629 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Epitaxial deposition of homopolymers from solution [polyethylene, isotactic polystyrene, poly-3,3-bischloromethyloxacyclobutane (Penton) and polypropylene] was found on the (001) faces of cleaved alkali halide single crystals. Electron and optical microscopy studies have shown that the polymer usually grew from small, rodlike crystallites which were oriented in (110) directions of the halide crystal. Large oriented, four-leaved, “rose” structures also were observed for polyethylene. Electron diffraction studies indicate that the polymer chain axes for polyethylene, isotactic polystyrene, and Penton generally lie parallel to the (001) faces of the halide crystal and are also oriented in the 〈110〉 directions of the crystal face. Investigations on the effect of various halide substrates upon the epitaxial crystallization habit of polyethylene inferes that lattice matching does not play the major role in orientation. Two possible explanations are offered for this epitaxial behavior.
    Additional Material: 20 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040406
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  • 5
    Electronic Resource
    Electronic Resource
    Effect of molecular weight upon the heterogeneous nucleation of crystallization in polypropylene (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 631-638 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The effect of basic aluminium dibenzoate upon the supercooling of polypropylene fractions of molecular weight 9.2 × 103-1.25 × 106 was determined by differential thermal analysis. The response to heterogeneous nucleation within the precision of the method used appears to be only slightly dependent, if at all, upon the molecular weight of the polymer.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040407
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  • 6
    Electronic Resource
    Electronic Resource
    Wideline NMR studies of oriented nylon 66 (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 639-647 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Wideline NMR techniques have been applied to both singly and doubly oriented specimens of nylon 66. Variations in the spectra obtained are observed for different orientations of the specimens relative to the applied field. These variations demonstrate that the zigzag chain axis is essentially parallel to the draw direction and that motion occurs in all of the sample. The motion is of two types: random in the mobile regions and rotation of segments about the chain axis in the rigid regions.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040408
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  • 7
    Electronic Resource
    Electronic Resource
    Molecular weight averages of polymers as determined by density gradient centrifugation. II. Application to nylon 66 (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 663-665 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040411
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  • 8
    Electronic Resource
    Electronic Resource
    Crystallization in poly(n-octadecyl methacrylate) monolayers (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 649-657 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The crystallization kinetics of poly(n-octadecyl methacrylate) has been studied at the air-water interface. The rate of the crystallization has been measured by the decrease in the area of monolayers with time at various temperatures and surface pressures. The crystallization isotherms have been analyzed by the general mathematical treatment of the kinetics of phase changes, and the results show linear growth to be dominant. The variation of the rate constant with temperature and pressure has been illustrated by the difference in the supersaturation defined by introducing the equilibrium pressure-area isotherms.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040409
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  • 9
    Electronic Resource
    Electronic Resource
    Microfibrillar textures in polymer fibers (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 668-672 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040413
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  • 10
    Electronic Resource
    Electronic Resource
    Specific heats of poly(vinyl chloride) compositions (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 673-684 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Specific heats of plasticized poly(vinyl chloride) can be readily obtained by means of the thin foil calorimeter when the polymer is fabricated into sheet or film. The effects of temperature and plasticizer content on the specific heat and of the plasticizer content on the glass temperature are readily observed. The data may be used to estimate the glass temperatures of plasticizers where those temperatures are not readily reached by normal techniques. The specific heat at the glass temperature is approximately 0.255 for the ranges of 0-30 phr plasticizer. A definite glass transition is not observed with 60 phr plasticizer. No other transitions were observed between 200 and 400°K. The previous history of the polymer is important, as it can change the specific heat of the polymer noticeably, especially above the glass temperature. Comparison of the values listed here with those obtained by others should be made with the understanding that these samples were fabricated by extrusion and were free of observable strain. The degree of crystallinity of these polymers is very small, probably less than 10%, since none was found by x-ray diffraction. The plasticizing effect of some stabilizers was noted.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040501
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  • 11
    Electronic Resource
    Electronic Resource
    Persistent polarization in polymers. II. Depolarization currentsPresented in part before the 13th Canadian High Polymer Forum, Ottawa, Ontario, Canada, September 22-24, 1965. (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 697-704 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Depolarization currents were used to study the persistent polarization induced in polystyrene and poly(methyl methacrylate) by cooling with flow under pressure. These studies showed that the charge on electrets made by flow under pressure consists in part of a surface charge which leaks off rapidly in moist air and in part of a charge due to volume polarization which decays more slowly. The volume polymerization produced in poly(methyl methacrylate) by flow under pressure is of the same order as that produced by cooling under a voltage drop, but flow under pressure produces a larger surface charge.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040503
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  • 12
    Electronic Resource
    Electronic Resource
    Persistent polarization in polymers. I. Relationship between the structure of polymers and their ability to become electrically polarizedPresented in part before the 13th Canadian High Polymer Forum, Ottawa, Ontario, Canada, September 22-24, 1965. (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 685-695 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The ability of various polymers to acquire persistent polarization (i.e., to become electrets) was investigated. Polarization was induced in the polymers by two methods: (a) by cooling under a voltage drop and (b) by cooling with flow under pressure. There was found to be an optimum temperature for electret formation by either method. This optimum temperature was roughly 37°C. above Tg when polarization was produced by application of a voltage drop and roughly 57°C. when polarization was produced by flow under pressure. Crystallinity and the nonhomogeneities present in blended polymers were harmful to electret formation, but a small critical amount of ionic impurity was helpful.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040502
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  • 13
    Electronic Resource
    Electronic Resource
    Molecular structure of polyethylene. XIII. An improved cryoscopic method for determining number-average molecular weight of polyethylene (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 705-714 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The determinations of the number-average molecular weight of polyethylene by cryoscopy has been improved, permitting precise measurements with both linear and branched polyethylenes in the molecular weight range 4,000-30,000. Improvements include a cryometer of new design, a lower-melting cryoscopic solvent containing a nucleating agent to control supercooling and rate of crystallization of the solvent, and more precise measurement of freezing point depression. Polyethylene samples are dissolved in hexamethylbenzene admixed with 0.1% of cadmium iodide, and steady-state freezingpoint depressions are measured with a thermistor to a maximum sensitivity of 5 × 10-5°C. Molecular weight measurements are reproducible to within ±10%. The cryoscopic apparatus and procedure are described in detail, and results obtained with samples of linear and branched polyethylene are presented and discussed.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040504
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  • 14
    Electronic Resource
    Electronic Resource
    Les polyélectrolytes à l'interface liquide-liquide (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 765-775 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The behavior of films of polyelectrolytes at the water-organic liquid interface depends on the nature of the interface and the pH of the substratum. The present paper investigates the influence of these two factors on the cohesive forces between monomer units. Two polyelectrolytes were studied: poly(methacrylic acid) (APM) and poly-2-vinylpyridine (2-PVP). In the case of uncharged films, the collapse pressure decreases when the polarity of the organic phase becomes more important, whereas the term ω/kT, which appears in the theory of Motomura and Matuura, increases. A quantitative relation between the parameter ω/kT and the collapse pressure may be deduced. The behavior of the ionized surface film at different pH values is modified by the choice of the interface. However, there exists a competition between two phenomena: the dissolution of ionized residues in the substratum and the electrostatic repulsion between charges in the surface plane. Depending upon whether the first or the second parameter is more important, we observed that the surface pressure decreased or increased with the degree of ionization.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040508
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  • 15
    Electronic Resource
    Electronic Resource
    Axial dispersion of polymer molecules in gel permeation chromatography (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 731-743 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Gel permeation chromatography is an elution chromatographic process depending on the permeation of the solute through a bed of gel particles. This process is used in the estimation of molecular weight distributions of polymers, since elution occurs in decreasing order of molecular size. The eluting species, however, are not perfectly fractionated, and apparent broadening of the distribution occurs. This broadening results from an axial (longitudinal) mixing of the eluting species. Consideration of the accessible bed volume for each species permits a correction to be made for this axial dispersion. The concept was applied to heterodisperse distributions by solving the resulting simultaneous equations. A least-squares regression may be employed to utilize the experimental data most effectively. The experimental chromatogram can be described in terms of accessible bed volume and dispersion coefficient of each species together with flow rate, sample concentration, and chromatograph column geometry. The chromatogram corrected for the axial dispersion describes the molecular weight distribution more accurately than does the experimentally determined curve. The correction procedure was applied to a well-characterized polystyrene; the results of the gel permeation chromatography show excellent confirmation of the results of fractionation and of other instrumental analyses.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040506
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  • 16
    Electronic Resource
    Electronic Resource
    Effect of crosslink density on the creep behavior of natural rubber vulcanizatesPaper presented at the 36th Annual Meeting of the Society of Rheology, Case Institute of Technology, Cleveland, Ohio, October 25-27, 1965. (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 745-763 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Torsional creep measurements on four natural rubber vulcanizates, crosslinked to different degrees, were carried out in the temperature range from -50 to 90°C. This investigation complements the studies on identical samples of the stress relaxation behavior by Chasset and Thirion and of the dynamic mechanical response by Ferry, Mancke, Maekawa, Ōyanagi, and Dickie. The creep measurements reported are shown to be in agreement with the stress relaxation results. In addition to the usual temperature reduction, a superposed curve was obtained for the long time response using the apparent molecular weight between crosslinks, Mc, as a reduction variable. The variation in viscoelastic response with crosslink density is interpreted as a restrictive action of the chemical crosslinks on the transient entanglement network.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040507
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  • 17
    Electronic Resource
    Electronic Resource
    Effect of stereosequence length on crystallization kinetics of propylene oxide polymersPresented to the Division of Polymer Chemistry, 150th American Chemical Society Meeting, Atlantic City, N. J., September 1965. (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 715-729 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Crystallization kinetics of crystalline fractions of propylene oxide polymers made with different catalysts have been studied by isothermal dilatometric and microscopical measurements. Isothermal microscopical measurements indicate that spherulite growth in these polymers proceeds from predetermined nuclei. The half time for spherulitic appearance is less than, but of the same order as, the half time for complete crystallization. Only by taking this factor into account can the dilatometric data be represented by the Avrami equation. The deviation of the crystallization isotherm from that predicted from the microscopical data using the Avrami theory is attributed to a secondary crystallization process taking place within the spherulite. Crystallization continues long after spherulites completely occupy the available volume in the polymer. By assuming that the secondary crystallization proceeds as a first-order process in the uncrystallized, but crystallizable, portions of the melt, it is shown that the crystallization isotherms can be completely described in terms of four parameters. These are: (1) the time constant for the primary crystallization process; (2) the time constant for nucleation; (3) the time constant for the secondary crystallization process, and (4) the extent of secondary crystallization. The important conclusions of these studies are: the rates of nucleation and of spherulitic growth are far more dependent on temperature than on stereoregularity; the ratio of the rate of the secondary crystallization process to that of the primary crystallization process is almost independent of temperature, but increases with increasing stereoregularity of the polymer.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040505
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  • 18
    Electronic Resource
    Electronic Resource
    Structure of pressure-crystallized polypropylene (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 777-788 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The structure of polypropylene crystallized at pressures up to 5000 atm. has been studied. Upon slow cooling from the melt at 320 atm., the γ modification, previously found only in low molecular weight and stereoblock fractions, begins to appear in small amounts in addition to the normal α monoclinic form. As the pressure is increased further, a larger proportion of the sample crystallizes in the γ form until, at 5000 atm., only the γ modification is present. X-ray and DTA studies show that the γ form of polypropylene transforms to the normal α modification at a temperature only slightly below the γ melting point. Evidence is presented which favors the occurrence of a solid-state transition as a model of transformation to the α form. Results from isothermal crystallizations at low supercoolings and annealing experiments under high pressure show that the melting point of the γ modification of polypropylene is very sensitive to crystallite perfection.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040509
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  • 19
    Electronic Resource
    Electronic Resource
    Molecular weight determination of polyamides by vapor pressure osmometry (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 817-825 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The vapor pressure osmometry method for determining the molecular weight of polyamides has been studied by use of the newly developed solvents. Polymers used were polycaprolactams, polyenanthamides, and polypelargonamides. The measurements were carried out with 2,2,3,3-tetrafluoro-1-propanol and 2,2,3,3,4,4,5,5,6,6,7,7-dodecafluoro-1-heptanol as solvents at 50 and 130°C., respectively. Endgroup determinations on samples were also done in m-cresol by 0.1 N-hydrochloric acid. Reduced resistance differences (ΔR/C)0 obtained by vapor pressure osmometry at 50°C. were found to be in linear relation with the reciprocal of the number-average molecular weight determined by endgroup titrations; but anomalous results were obtained when dodecafluoroheptanol was used as the solvent at 130°C.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040512
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  • 20
    Electronic Resource
    Electronic Resource
    Orientation behavior of stereoregular poly(vinyl alcohols) (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 797-816 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The orientation behavior of stereoregular poly(vinyl alcohols) was investigated during stretching and after releasing the stress on the bulk polymers at relatively high humidity (80% R. H.) A structural model, differing from polyethylene, was proposed in which the crystallites were embedded in a considerably swollen amorphous matrix without any definite physical interaction so as to form an aggregation of crystallites, a superstructure. The crystal orientation followed, in principle, “the first borderline case” of Kratky, but with some difference from theory in orientation, while the noncrystalline orientation was represented by the freely jointed equivalent chain model of Kuhn and Grün with a value of N/γ as small as around 5. The difference between crystal orientation found and the theorietical orientation is discussed and some factors which prevented the crystal orientation are considered.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040511
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  • 21
    Electronic Resource
    Electronic Resource
    Group motions in the glassy state of some substituted polystyrenes and poly(vinyl benzoates) (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 789-796 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Mechanical damping measurements were carried out in the range of 103-105 cps and between 60°K. and the softening point on some substituted Polystyrenes and poly(vinyl benzoates) containing different substituents (methyl groups, methoxy groups, and halogen atoms) either in the ring or in the main chain. The ortho and meta ring-substituted polystyrenes do not show any secondary mechanical relaxation in the glassy state, although all the other substituted polystyrenes, exhibit a low-temperature damping peak (δ process) (which is in some way connected with ring motions) whose height and temperature location depend on nature, position, and number of substituents. Substituents in the para position of the ring or in the α position in the backbone chain shift the δ peak of the unsubstituted polystyrene towards higher temperatures; this shift is accompanied by an increase of the apparent activation energy E*. Substitution in the β position, on the contrary, does not affect the δ peak. Analogous results are obtained for substituted poly(vinyl benzoates), which exhibit, in addition, a β relaxation effect, associated with carboxyl group motions. A very good correlation is found between the values of E* and the limiting relaxation time τ for the δ relaxation of polystyrenes and poly(vinyl benzoates), similarly substituted in the ring, indicating that the δ relaxation leads to absorption curves in the mechanical relaxation spectrum which are characteristic of the structure of the aromatic side chain.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040510
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  • 22
    Electronic Resource
    Electronic Resource
    The equilibrium melting point of polyoxymethylene (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 827-829 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040513
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  • 23
    Electronic Resource
    Electronic Resource
    Preparation and use of very tight osmotic membranes (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 830-831 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040514
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  • 24
    Electronic Resource
    Electronic Resource
    Second virial coefficient of amylose acetate (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 835-844 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The second virial coefficients of amylose acetate fractions have been determined at different temperatures and have been analyzed according to recent theories of second virial coefficient.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040601
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  • 25
    Electronic Resource
    Electronic Resource
    Relaxation phenomena in concentrated polyelectrolyte solution. II (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 845-854 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Dynamic viscoelastic properties of 10 and 20% aqueous solutions of sodium polyacrylate were studied by the electromagnetic transducer method at 500 cps in the temperature range of 0-50°C. These solutions distinctly showed a relaxation phenomenon in this temperature range which was also affected by addition of such compounds as sodium chloride, urea, and dioxane. An anomalous behavior that cannot be explained as due to the relaxation phenomenon was observed on the addition of small amounts of these agents. One of the causes of this behavior is ascribed to the ion association in the solution. The static viscosity of the solution was also measured by using a rotating cylinder viscometer and the results compared with the dynamic data.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040602
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  • 26
    Electronic Resource
    Electronic Resource
    Glass transitions in ionic polymersContribution no. 1890 from the Department of Chemistry, University of California, Los Angeles, Calif. (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 855-868 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The glass transitions of an ionic polymer in bulk have been studied as a function of the counterion for various homo- and copolymers. It is shown that the glass transition temperature can vary by as much as 530°C., from -10°C. for the nonionic material to +520 for Ca2+ or Zn2+ substituted polymer. From simple electrostatic considerations, it is shown that a linear correlation should exist beween the glass transition and the ratio of the cation charge, q, to the internuclear distance, a, between cation and chain anion; for this particular material (the polyphosphate chain) the relation is Tg = 625(q/a) -12 where q is in units of one electron and a is in A. If the data are interpreted in the light of the Gibbs-DiMarzio theory, it is seen that both the chain stiffness and the intermolecular energy increase in an approximately parallel manner as q/a increases.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040603
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  • 27
    Electronic Resource
    Electronic Resource
    Configurational entropy of polyethylene and other linear polymers (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 869-880 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The configurational entropy of the polyethylene chain at the melting points calculated in two ways. In both calculations, tetrahedral angles and discrete trans and gauche arrangements of all bonds are assumed, and trans bonds are assumed more stable than gauche by energy U1. First, calculations are made on chains of up to N = 18 bonds, disallowing all configurations having overlapping atoms, and the result is extrapolated to large N. Second, a calculation is made directly for long chains, with overlaps excluded only over every short chain segment. The results are in almost exact agreement, suggesting that the second method can be safely used with other molecules. The calculated configurational entropy is in line with that suggested by the entropy of fusion, assuming the chains to acquire a configurational freedom in the melt which approaches that of independent chains.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040604
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  • 28
    Electronic Resource
    Electronic Resource
    Angular distribution of intensity of rayleigh scattering from comblike branched molecules (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 881-897 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The angular distribution function P(θ) for intensity of light scattered by a dilute solution of comblike branched molecules has been determined for three situations of some interest for evaluation of experimental data: (1) the molecules are identical with branches of equal length attached equidistantly along linear backbone chains; (2) the molecules are homogeneous in mass, with the same number of branches on each molecule, but the branches are distributed at random along the chain; (3) branches and main chains are still uniform, but the molecules are heterogeneous in mass with the number of branches per molecule distributed according to the binomial distribution and the branches in any molecule spaced randomly along the backbone. Examination of numerical results shows that the scattering functions for models (1) and (2) are not very different. The function for case (3) is somewhat different from the others when the mean number of branches per molecule is small but they contain a large fraction of the mass of the molecule. Over a limited range of the pertinent variables (corresponding roughly to observations on typical vinyl polymers of molecular weights up to 106) all three functions agree quite well with P(θ) for homogeneous linear chains with the same mean-square radius of gyration.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040605
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  • 29
    Electronic Resource
    Electronic Resource
    Light-scattering study of the molecular weight distribution of polypropylene (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 923-942 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A light-scattering study is presented of two isotactic polypropylene samples with broad molecular weight distributions (Mw/Mn = 8.1 and 8.7, respectively) dissolved in α-chloronaphthalene at 147°C. Incident radiation of 5460, 4358, and 3650 A. was used. The reciprocal intramolecular scattering function, P-1(u) is expressed as a function of the variable [sin(θ/2)/λ′]2. This provides a wider range of experimental values of the variable u = 16π2(b2/6) [sin(θ/2)/λ′]2 than is accessible by the usual technique of using only one wavelength. The shape of the function P-1(u) is closer to that predicted theoretically if the weight distribution function f(N) in the equation \documentclass{article}\pagestyle{empty}\begin{document}$ P(u) = \int_0^\infty {Nf(N)P_N (u)dN} /\int_0^\infty {Nf(N)dN} $\end{document} is given by the log-normal distribution rather than the distribution function of Schulz and Zimm. The method is applicable to polymer samples for which the average molecular weights are too low to be measured by the light-scattering method of Benoit and Loucheux.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040608
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  • 30
    Electronic Resource
    Electronic Resource
    Effect of chemical reagents on the fine structure of cellulose. Part III. Action of caustic soda on cotton and ramie (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 571-586 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The changes in x-ray orientation brought about by the treatment of cotton and ramie with caustic soda of different concentrations have been studied. With ramie the effect of the treatment is to decrease the x-ray orientation, while with cotton the reverse is true. The cause of this difference is traced to a difference in the morphology of the two fibers rather than a difference in their fine structure.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040403
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  • 31
    Electronic Resource
    Electronic Resource
    Frequency and temperature dependence of the dynamic mechanical properties of poly-4-methylpentene-1Presented at the 33rd Annual Meeting of the Society of Rheology, Baltimore, Maryland, October 29-31, 1962. (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 559-569 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The dynamic mechanical properties of poly-4-methylpentene-1 have been measured in torsion in the temperature range from 25 to 160°C. at frequencies from 10-3 to 10 cps. Two transitions are found. The first, with a peak at 40°C. at 1 cps, appears as a normal glass transition. A broad high temperature peak appears at 130°C. The dynamic compliance-frequency data can be superposed by the conventional method of reduced variables for temperatures up to 100°C. The temperature dependence of the shift factors follows the WLF equation. Above this temperature, superposition can be achieved by applying horizontal and vertical shifts to both components of the dynamic compliance. When the vertical shift is permitted, the range of applicability of the WLF equation is extended to 160°C.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040402
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  • 32
    Electronic Resource
    Electronic Resource
    Dynamic mechanical properties of crystalline, linear polyethylene (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 545-557 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Two sets of dynamic mechanical property data and some stress relaxation data for semicrystalline, linear polyethylene are treated by data reduction methods previously described. These data can be represented by a master plot of reduced modulus versus reduced frequency and two sets of temperature-dependent shift factors. The first of these factors reflects the change of viscoelastic relaxation times with temperature. The second represents a separable change of modulus with temperature which applies over the entire time or frequency range of the experiments. This change is larger and in the opposite direction to that found applicable in the behavior of noncrystalline plastics and rubbers. The two sets of dynamic data show the same frequency-temperature dependence which can be represented by an activation energy of 22 kcal./mole. Small differences in the modulus-temperature dependence are attributed to differences in molecular weight or annealing conditions. The stress relaxation data superposes to a curve in good agreement with the dynamic data but with a factor of 20 difference in time scale. This difference is attributed to the finite strains used in the stress relaxation measurements. Such strains might be expected to increase free volume in simple extension deformations and so accelerate the relaxation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040401
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  • 33
    Electronic Resource
    Electronic Resource
    NMR observations of drawn polymers. V. Sorption into drawn and undrawn polyethylene (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 4 (1966), S. 587-598 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: NMR measurements on undrawn polyethylene (PE) samples in contact with a solvent such as C2Cl4 indicate an increase in the mobility of the mobile chain segments as compared to dry samples. Highly drawn PE shows no such effect. This is because Sa, the sorption per unit mass of noncrystalline material present, decreases from 20.9 wt.-% (dry basis), found for undrawn quenched PE, to 0.63 wt.-% after drawing (Sa determined at 25°C. and 0.80 vapor activity). Drawing also reduces the segment mobility according to the NMR spectrum. It is shown that these effects are caused by considerable structural changes occurring in the noncrystalline regions of PE upon drawing. Annealing of drawn PE samples at successively higher temperatures leads to a gradual relaxation of the noncrystalline regions towards the state characteristic of undrawn PE. With increasing annealing temperature Sa as well as the mobility approach values found with undrawn PE.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.160040404
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  • 34
    Electronic Resource
    Electronic Resource
    Modellversuche zur Peroxygenierung von natürlichen ungesättigten Fetten und Ölen.III. Peroxygenierung α,β-ungesättigter Alkohole (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 31 (1966), S. 7-13 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Wie an γ-Hydroxy-crotonsäuremethylester (III) und α-Hydroxy-vinylessigsäure-methylester (IV) gezeigt wird, führt die Peroxygenierung α,β-ungesättigter Hydroxy-Verbindungen zu Wasserstoffperoxyd und den entsprechenden α,β-ungesättigten Carbonyl-Verbindungen.Der aktivierende Einfluß der olefinischen Doppelbindung auf die Peroxygenierbarkeit von Hydroxy-Verbindungen wird an der Reihe Diäthylcarbinol, Äthyl-vinylcarbinol und Divinylcarbinol nachgewiesen. Auch α-ständige veresterte Carboxylgruppen wirken im geringen Maße aktivierend.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660310102
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  • 35
    Electronic Resource
    Electronic Resource
    Darstellung und Eigenschaften der 8-Chinolylmercaptomethansulfonsäure (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 32 (1966), S. 175-177 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird über die Darstellung des Natriumsalzes der 8-Chinolylmercaptomethansulfonsäure aus Natrium-8-mercaptochinolinat und Natriumchlormethansulfonat in Dimethylformamid sowie über die Gewinnung der freien Säure berichtet.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660320310
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  • 36
    Electronic Resource
    Electronic Resource
    Über die Oxydation von Harnstoff, Semicarbazid und Carbohydrazid mit Natriumhypochlorit (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 32 (1966), S. 190-197 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In Fortführung von Arbeiten über Hydrazin und Hydrazinderivate(1-5) wurden die Reaktionen von Harnstoff H2N · CO · NH2, Semicarbazid H2N · CO · NH · NH2 und Carbohydrazid H2N · HN · CO · NH · NH2 mit Natriumhyprochlorit in neutralem und alkalischem Medium präparativ und UV-spektroskopisch untersucht.Die bekannte Reaktion zur Bildung von Hydrazin aus Harnstoff und Natriumhypochlorit in alkalischer Lösung wurde insbesondere hinsichtlich der bestehenden Annahme, daß sie nach dem HOFMANNschen Abbau verläuft, erneut diskutiert. Das als Beweis für die Bildung von N-Chlorharnstoff als ersten Reaktionsschritt nach dem HOFMANNschen Abbau angesehene Absorptionsmaximum bei 2450 Å, das durch Oxydation von Harnstoff mit tert.-Butylhypochlorit entsteht, konnte bei der Oxydation mit Natriumhypochlorit ebenfalls beobachtet werden, jedoch nur in neutralem Medium.Bei entsprechenden Oxydationsreaktionen von Semicarbazid und Carbohydrazid mit Natriumhypochlorit traten im Bereich von 2000-3000 Å keine Absorptionen auf, die auf entstandene N--Cl-Bindungen hindeuten könnten. Ein möglicher Reaktionsverlauf bei der Oxydation dieser beiden Verbindungen in alkalischem Medium über intermediär gebildetes Triazan und Tetrazan wird angegeben.Nach einer bisher noch nicht beschriebenen Methode konnten Hydrazindicarbonsäurediamid H2N · CO · HN · NH · CO · NH2 und das primäre Natriumsalz der Cyanursäure NaC3H2N3O3 · H2O durch Oxydation von Semicarbazid bzw. Harnstoff in neutraler Lösung mit Natriumhypochlorit dargestellt werden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660320312
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  • 37
    Electronic Resource
    Electronic Resource
    Zur Verwendung von Dimethylsulfoxid als Lösungsmittel bei kryoskopischen Molekulargewichtsbestimmungen (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 32 (1966), S. 230-234 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird die Möglichkeit des Einsatzes von Dimethylsulfoxid als Lösungsmittel für kryoskopische Molekulargewichtsbestimmungen nach BECKMANN unter Berücksichtigung eigener Erfahrungen beschrieben und die molare Gefrierpunktserniedrigung von Dimethylsulfoxid experimentell zu 4,4° ermittelt.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660320502
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  • 38
    Electronic Resource
    Electronic Resource
    Über organische Katalysatoren. LXXVIII. Chelatkatalyse. XIX (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 32 (1966), S. 283-290 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Zersetzungsgeschwindigkeit von Wasserstoffperoxid in Gegenwart von Kobaltchelaten des Bis-(2-aminobenzyliden)-äthylendiamintyps wird in Abhängigkeit von der C-Zahl (n = 2-6) der Diaminkomponente untersucht. Nur die Verbindung mit n = 2 ist katalytisch wirksam. Die Dissoziationskonstanten der Kupferchelate werden potentiometrisch bestimmt. Die Chelatbildung der Innerkomplexe verläuft stufenweise.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660320509
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  • 39
    Electronic Resource
    Electronic Resource
    Darstellung höherer Alkylester von Phosphor-, Phosphon- und Phosphinsäuren durch Umalkylierung (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 33 (1966), S. 188-198 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In Gegenwart tertiärer Phosphine reagieren höhere Alkylhalogenide bei 140-180°C mit Methyl- oder Äthylestern von Phosphor-, Phosphon- und Phosphinsäuren (I) leicht unter Freisetzung von Methyl- oder Äthylhalogeniden. Dabei entstehen im Sinne einer schrittweisen Umalkylierung die höheren Alkylester der Phosphor-Säuren. Die katalytische Wirkung der tertiären Phosphine beruht auf der primären Bildung quartärer Phosphoniumhalogenide, die sich chne Beeinträchtigung der Esterausbeute auch durch Lithiumchlorid ersetzen lassen.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660330312
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  • 40
    Electronic Resource
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    Untersuchungen über den Aufschluß von Monazit durch Erhitzen mit Kohlenstoff und QuarzHerrn Professor Dr. L. Wolf zum 70. Geburtstag gewidmet (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 34 (1966), S. 83-90 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Reaktion von Monazit mit Kohlenstoff und Quarz wurde bei Temperaturen zwischen 1400°C und 1700°C untersucht. Es bilden sich neben elementarem Phosphor die Silikate der Seltenen Erden und des Thoriums. Diese lassen sich mit Salzsäure extrahieren.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660340110
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  • 41
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    Electronic Resource
    Darstellung der 2-Methyl-1,10-phenanthrolin-6-sulfonsäure (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 32 (1966), S. 173-174 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Durch DOEBNER-MILLER-Reaktion kann man aus 8-Aminochinolin-5-sulfonsäure das Natriumsalz der 2-Methyl-1,10-phenanthrolin-6-sulfonsäure darstellen, welches leicht in die Säure überführbar ist.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660320309
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  • 42
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    Peptidsynthesen unter Anwendung von N-Carbonyl-aminosäure-nitrobenzyl- und nitrophenylestern (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 32 (1966), S. 204-210 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Durch Umsetzung von Salzen der Aminosäure-p-nitrobenzyl- und -p-nitrophenylester mit Phosgen erhält man gut kristallisierende N-Carbonyl-aminosäureester, deren Verwendung bei Peptidsynthesen prinzipiell gezeigt wird.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660320314
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  • 43
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    Aromatizität bei Pseudoazulenen. IVIII. Mitteilung s. Fußnote (11).. MO-Berechnungen am Cyclopenta(b)pyridin (Azalen) (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 32 (1966), S. 211-216 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die für Cyclopenta(b)pyridin (Azalen) und seine benzkondensierten Derivate nach der MO-LCAO-Methode in HÜCKELscher Näherung erhaltenen Aussagen über Elektronenverteilung, Reaktivität und Lichtabsorption beweisen das azulenähnliche Verhalten dieser Substanzklasse. Die berechneten Eigenschaften der Azalene stimmen mit vorliegenden experimentellen Daten überein. Die Elektronenverteilung in den Pseudoazulenen hängt von der Elektronegativität des Heteroatoms ab.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660320315
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  • 44
    Electronic Resource
    Electronic Resource
    Acylharnstoffe (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 32 (1966), S. 265-273 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Aus 2-Alkyl-2-brom-acylbromiden und Harnstoffen erfolgt die Darstellung von 2-Alkyl-2-brom-acylharnstoffen, aus denen durch Abspaltung von Bromwasserstoff mit Silberoxid 1-(2-Alkyl-cis-Δ2-acyl)-harnstoffe und mit Pyridin 1-(2-Alkyl-trans-Δ2-acyl)-harnstoffe erhalten werden.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660320507
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  • 45
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    Zur Darstellung N-substituierter Desylamine (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 32 (1966), S. 307-310 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Ausgehend vom 4-Nitro- und 4-Chlor-4′-methoxy-desylbromid werden durch Umsetzung mit Methyl- und Dimethylamin die entsprechenden Hydrochloride der N-substituierten Desylamine erhalten.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660320511
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  • 46
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    Über die Umsetzung von Halogenacylamiden mit Pyridinderivaten (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 32 (1966), S. 311-316 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: α-Halogenacylamide setzen sich mit Pyridin und Derivaten, wie Pyridin-carbonsäureamiden zu quaternären Pyridinderivaten, zu Pyridinium-Verbindungen um, bei Gegenwart von Natrium-amid bilden sich aus Pyridin-carbonsäureamiden, N-Acylamino-pyridin-carbonsäureamide.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660320512
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  • 47
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    Notiz zur Darstellung von Tropolon-5-aldehyden (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 33 (1966), S. 1-4 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 3,7-Dibromtropolon wird durch Umsetzung mit Formaldehyd und Piperidin und anschließende Oxydation der MANNICH-Base mit KMnO4 in die 5-Formylverbindung umgewandelt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660330101
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  • 48
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    Ω-Diazofettsäureester. III. Reaktionen der Ω-Diazofettsäureester mit Säuren und Säurechloriden (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 34 (1966), S. 262-271 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: ω-Diazofettsäureester werden durch wäßrige Halogenwasserstoffsäuren zu den entsprechenden ω-Halogenfettsäureestern zersetzt, mit verd. H2SO4 entstehen hauptsächlich ω-Hydroxyfettsäureester. Die durch Einwirkung von Benzoylchlorid in Gegenwart von Triäthylamin leicht erhältlichen ω-Benzoyl-diazofettsäureester ermöglichen die Synthese einiger auf anderen Wegen schwierig oder nicht herstellbarer Verbindungen und sind außerdem der Wolffschen Umlagerung zugänglich.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660340505
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  • 49
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    Eine neue Synthese von Diphenylisopropylaminen (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 34 (1966), S. 335-340 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird eine neue Synthese von Diphenylisopropylaminderivaten aus Phenylisopropanolaminen und Benzolkohlenwasserstoffen bei Gegenwart einer Lewis-Säure, wie Aluminiumchlorid, beschrieben.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660340510
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  • 50
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    Studies on the Mixed Gels of Silica, Alumina and Ferric Oxide (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 33 (1966), S. 152-159 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Sol-gel transformation of mixed gels of silica, alumina and ferric oxide has been studied by determining the variations in pH with time of dialysis. For silica-alumina mixtures a pH of 2.9 is invariably reached irrespective of the alumina content of the mixtures. The amount of alumina present in the mixture influences the time of setting of the gel to a very great extent and it decreases with increase of the alumina content of the mixtures. These results have been explained in light of chemical interaction between the two gels to give aluminosilicates as well as in terms of controlled coagulation phenomenon with alumina behaving as a foreign electrolyte for bringing about the gelation of silicic acid.The results of silicic acid, ferric oxide gel forming mixtures are altogether different. In this case the time of gelation increases with the increase in the amount of ferric oxide in the gelation mixture, while a pH of 4.2 is reached irrespective of the amount of ferric oxide present. No evidence for the formation of ferric-silicate is obtained nor the gelation of these mixed sols can be explained in terms of controlled coagulation.The colloidal silica appears to act as protective colloid for the highly acedic ferric oxide sol. Viscometric and pH metric studies on the addition of alumina sol to mixtures of ferric oxide and silica sols indicate that alumina competes with ferric oxide in the formation of mixed gels. Here, too a pH of 2.9 is invariably reached irrespective of the alumina content in the mixed gels.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660330307
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  • 51
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    Flüssige Ionenaustauscher. 2. Beobachtungen bei der Synthese von Di-2-äthylhexylphosphatDiese Arbeit ist ein Teilauszug aus der Dissertation K. HÄUPKE, Math.-Nat. Fakultät der Universität Halle. (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 33 (1966), S. 206-212 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Bei der Synthese von Di-2-äthylhexylphosphat aus 2-Äthylhexanol und POCl3 ergab sich eine Abhängigkeit der Zusammensetzung des aus Di-2-äthylhexylphosphat und dem Nebenprodukt Mono-2-äthylhexylphosphat bestehenden Endproduktes von der Dauer der gegenseitigen Einwirkung bei erhöhter Temperatur. Während die Gesamtausbeute an Ester durch ein Maximum läuft, schwankt das Verhältnis Mono- zu Di-2-äthylhexylphosphat periodisch.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660330314
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  • 52
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    Bemerkungen zur Darstellung langkettiger Zinkdialkyle (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 33 (1966), S. 229-234 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Im folgenden werden die Darstellungsbedingungen für langkettige Zinkdialkyle untersucht. Präparative Schwierigkeiten bei der Gewinnung reiner Verbindungen, die je nach Darstellungsmethode bei wachsender Kettenlänge der Zinkdialkyle zunehmen, werden erörtert.
    Additional Material: 1 Ill.
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    URL: http://dx.doi.org/10.1002/prac.19660330502
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  • 53
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    Synthese von kristallin-flüssigen Verbindungen. I. n-Alkyl- und n-Alkoxyderivate des 3-Hydroxy-2,5-diphenyl-pyrazins (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 33 (1966), S. 265-276 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es werden die Synthesen von 2 homologen Reihen des 3-Hydroxy-2,5-diphenyl-pyrazins und 2-Benzoyl-4(5)-phenyl-imidazols beschrieben. p-n-Alkyl- und p-n-Alkoxyphenylglyoxal-hydrate kondensieren unter ammoniakalischen Bedingungen bevorzugt zu den entsprechenden Imidazolylketonen und nur in geringen Ausbeuten zu Hydroxypyrazinen. Die Alkylhomologen des Pyrazins schmelzen ab Äthylderivat zu kristallin-flüssigen Phasen auf, die dem smektischen Typ angehören. Mit wachsenden Flügelgruppen treten Umwandlungspunkte in diesen Phasen auf. Die beiden ersten Glieder der Ätherreihe haben zusätzlich einen nematischen Bereich. Allen Imidazolylketonen fehlen diese Eigenschaften. Der Einfluß der α-ständigen Hydroxygruppe am heterocyclischen Mittelstück der gestreckten Molekeln wird diskutiert.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660330508
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  • 54
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    Die Komplexbildung von Kupfer(II)-salzen mit Veresterungsprodukten der ÄthanolamineProfessor Dr. Leopold Wolf zum 70. Geburtstag gewidmet (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 34 (1966), S. 190-200 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Ester des β-Hydroxy-äthylamins und des Bis-(β-hydroxy-äthyl)-amins bilden mit Kupfer(II)-halogeniden kristalline 1,2-Komplexe, während sich ihre Hydrochloride mit CuCl2 zu Tetrachlorocupraten(II) umsetzen. Aus Lösungen, die Tris-(β-phenyl-carboxy-äthyl)-amin (TPÄ) und Kupfer(II)-halogenide enthalten, kristallisieren Tri-bzw. Tetrahalogenocuprate(II). Die erforderlichen Protonen werden in einer Nebenreaktion von Redoxcharakter geliefert. Partielle Veresterungsprodukte des Tris-(β-hydroxy-äthyl)-amins setzen sich mit Kupfer(II)-salzen zu Koordinationsverbindungen von z. T. innerkomplexem Charakter um. Die Strukturen der dargestellten Verbindungen werden diskutiert.
    Additional Material: 1 Tab.
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    URL: http://dx.doi.org/10.1002/prac.19660340123
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  • 55
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    Über Synthese spasmolytisch wirksamer Substanzen. XX. Synthese neuer basischer Amide von α-Alkoxydiphenyl-essigsäuren (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 31 (1966), S. 14-19 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird die Synthese einer Reihe neuer basischer Amide von α-Alkoxydiphenylessig-säuren beschrieben, deren Alkoxygruppe einerseits verzweigte Alkylgruppen, Alkylaryl-gruppen sowie Alkoxyäthergruppen trägt.
    Additional Material: 1 Tab.
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    URL: http://dx.doi.org/10.1002/prac.19660310103
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  • 56
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    Studies on the formation of complex compounds between Uranyl Nitrate and transitional metal Nitrate. The system: Th(No3)4—UO2(No3)2—H2O (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 31 (1966), S. 55-60 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Determination of conductance, pH, Spectrophotometry, and Refractive-Index measurements of a series of mixed solutions of uranyl nitrate and thorium nitrate, indicate the existence of one definite complex-compound in the solution namely \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm Th(NO}_{\rm 3} {\rm)}_{\rm 4} - {\rm UO}_{\rm 2} ({\rm NO}_{\rm 3})_2 $$\end{document} Monovariation method of NNYAR and PANDE (1), has been followed in the preparation of the solution and in the investigation of properties. Aqueous solution of the uranyl nitrate and thorium nitrate were prepared in such a way that the concentration of uranyl nitrate was kept constant, while that of thorium nitrate was varied systematically, and the physico-chemical properties recorded. When the values are plotted against the concentration of thorium nitrate curves are obtained with the specific breaks. The kink occurs at exact stoichiometric ratio of the concentrations corresponding to the compound noted above.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660310108
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  • 57
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    Studies on the formation of complex compounds between Uranyl Nitrate and transitional metal Nitrate. The system: La(NO3)3—UO2(NO3)2—H2O (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 31 (1966), S. 61-67 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Experiments with the system Uranyl nitrate-Lanthanum nitrate-water viz., Conductance, pH, and spectrophotometry revealed the existence of the following compounds in solution. \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm (1)\,\, La(NO}_{\rm 3} {\rm)}_{\rm 3} - {\rm UO}_{\rm 2} ({\rm NO}_{\rm 3} )_2 {\rm \quad\quad(2)\,\,2La(NO}_{\rm 3} {\rm)}_{\rm 3} - {\rm UO}_{\rm 2} ({\rm NO}_{\rm 3})_2 $$\end{document} A set of 22 mixed solutions was prepared by following Nayar and Pande's monovariation method1. In all the solutions the concentration of uranyl nitrate was kept constant (i. e. M/200), while that of lanthanum nitrate varied systematically from 0.0M to 0.021M. The physico-chemical properties, namely conductivity, pH, and spectrophotometry were used for the investigation of complex-compounds in the above system. When these values are plotted against the varying concentration of Lanthanum nitrate two breaks were obtained in the regular curves at concentrations corresponding to the compounds having the above formulae. The results obtained by all these physico-chemical properties are in excellent agreement leading to the same conclusions.
    Additional Material: 3 Ill.
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    URL: http://dx.doi.org/10.1002/prac.19660310109
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    Physico Chemical Studies on the Metal Chelates of Nitroso R salt, thoron, chromotrope 2 B and chrome azurol S in aqueous solution (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 31 (1966), S. 68-75 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Composition and stability of palladium-Nitroso R Salt chelate, lanthanum, thorium, uranium and palladium chelates of Thoron, lanthanum-Chromotrope 2 B chelate and palladium-Chrome Azurol S chelate have been reported. The range of stability of the chelates with pH have also been determined. The use of Chrome Azurol S, Chromotrope 2 B, Murexide, Thoron, Quinizarin sulphonic acid, and gallocyanine in the complexometric determination of thorium against EDTA has also been reported.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660310110
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  • 59
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    Über organische Katalysatoren, LXXIV. Chelatkatalyse XVII (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 31 (1966), S. 167-178 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Darstellung einer Reihe Schiffscher Basen des Chinolin-2-aldehyds, des Chinolin-8-aldehyds, des 8-Hydroxychinolin-2-aldehyds und des 3-Hydroxychinolin-2-aldehyds wird beschrieben. Eine Übersicht über das katalatorische 2 Verhalten der Metallchelate wird mitgeteilt.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660310309
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  • 60
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    Heterocyclen aus CH-aciden Nitrilen. IV. Addition von Schwefelkohlenstoff an Alkylidenmalonitrile und -cyanessigester (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 31 (1966), S. 205-213 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Alkyliden- bzw. Aralkylidenmalonitrile und -cyanessigester reagieren bei Raumtemperatur mit Schwefelkohlenstoff zu substituierten 6-Amino-2 H-thiopyranthionen-(2), die sich unter Einwirkung von Natronlauge in 6-Mercaptopyridone-(2) und bei der Behandlung mit Mineralsäuren in Gegenwart von Alkohol in 6-Alkylmercapto-thiopyranone-(2) umwandeln.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660310312
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    Zur Kenntnis der Hugershoff-Reaktion. VI. Die Umsetzung von Acetyl-malonsäureäuthyl-esterthioaniliden und anderen Thion-Thiol-tautomeren Verbindungen mit Brom (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 31 (1966), S. 262-268 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Acetyl-malonsäureäthylesterthioanilide cyclisieren mit Brom zu Benzthiazoly-(2)-acetessigsäureäthylestern. Es wurden Versuche unternommen, auch andere Verbindungen mit Thion-Thiol-Tautomerie in der HUGERSHOFF-Reaktion umzusetzen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660310503
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  • 62
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    Zur 1,3-dipolaren Addition der Pyridinium-und Isochinolinium-betaine (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 31 (1966), S. 293-303 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Umsetzung von 2,4-Dinitro-phenyl-pyridiniumchlorid und 2,4-Dinitro-phenyl-isochinoliniumchlorid mit heterocyclischen Hydrazinen führt zu den entsprechenden Hydrazonen des 1-[2,4-Dinitro-anilino]-pentadien-(1,3)-als-(5) bzw. β-[2,4-Dinitro-anilino]-o-styroaldehyds. Durch Erhitzen der Hydrazone in Eisessig bzw. alkohol. Salzsäure erfolgt Ringschluß zu Pyridinium- bzw. Isochinolinium-betainen, die zur 1,3-dipolaren Addition befähigt sind und mit geeigenten Dipolaphilen zu Pyrazolo [1,5-a]pyridinen bzw. Pyrazolo-[5,1-a]isochinolinen cyclisieren.
    Additional Material: 3 Tab.
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    URL: http://dx.doi.org/10.1002/prac.19660310506
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  • 63
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    Über die Darstellung N-substituierter 1-Oxo- und 3-Oxo-1,2,3,4-tetrahydroisochinoline (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 32 (1966), S. 12-19 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Durch Spaltung von Isochromanon-(1) (IV) mit α,α,α′-Trichlordimethyläther oder Phosphoroxychlorid zu 2-(β-Chloräthyl)-benzoylchlorid (V) und Reaktion von V mit primären Aminen werden in guten Ausbeuten N-substituierte 1-Oxo-1,2,3,4-tetrahydroisochinoline (III) erhalten. N-substituierte 3-Oxo-1,2,3,4-tetrahydroisochinoline können durch direkte Umsetzung von Isochromanon-(3) mit primären Aminen dargestellt werden.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660320102
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    Über Silikone. XCVI. Darstellung von 1,3,3,5-Tetramethyl-1,1,5,5-tetraphenyl- und 1,3,5-Trimethyl-1,1,3,5,5-pentaphenyl-trisiloxan (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 32 (1966), S. 31-36 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Aus Diphenylmethylsilan wurden über das Natriumdiphenylmethylsilanolat mit Dimethyl bzw. Methylphenyldichlorsilan nach der Williamsonschen Synthese 1,3,3,5-Tetramethyl1,1,5,5-tetraphenyl- und 1,3,5-Trimethyl-1,1,3,5,5-pentaphenyl-trisiloxan dargestellt.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660320105
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  • 65
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    Eine neue Methode zur Darstellung von Zinkdiarylen (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 32 (1966), S. 54-58 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Bortriarylverbindungen reagieren mit Zinkdiäthyl bzw. Zinkdimethyl unter Austausch der Alkyl- und Arylreste. Diese zur Darstellung reiner Zinkdiaryle gut geeignete Methode läßt sich auch auf die Gewinnung bestimmter Zinkdialkyle, z. B. des Zinkdiallyls, übertragen. Durch Einwirkung von Zinkdiäthyl auf Bortribenzyl konnte erstmalig das Zinkdibenzyl in reiner Form isoliert werden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660320109
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  • 66
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    Electronic Resource
    Über die Bildung des 1,2-Di-piperidino-cyclohexen-1 (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 32 (1966), S. 98-101 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Bei der Umsetzung von α-Chlorcyclohexanon mit Pyperidin in Toluol tritt ein Nebenprodukt auf, das als 1,2-Di-piperidino-cyclohexen-1 identifiziert wird.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660320113
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  • 67
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    Röntgenographische Untersuchungen am System Neodymoxid-Ytterbiumoxid (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 32 (1966), S. 113-117 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Im System Nd2O3-Yb2O3 tritt innerhalb eines relativ großen Bereiches Mischkristallbildung ein. Dies konnte durch Präzisionsbestimmung der Gitterkonstanten der einzelnen Mischoxide sowie durch Phasenbetrachtungen bewiesen werden. Bei der Untersuchung der Yb2O3-reichen Seite wurde eine Abhängigkeit der Mischbarkeitsgrenze von der Glühtemperatur gefunden und gedeutet. Die Mischkristalle der Yb2O3-reichen Seite weisen C-Sesquioxidstruktur (D53-Typ) auf. Die Untersuchung der Nd2O3-reichen Seite erfolgte unter Bedingungen, die das Auftreten des Nd2O3 im kubischen C-Typ gewährleisten. Auch hier konnte erhebliche Mischbarkeit nachgewiesen werden.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660320301
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  • 68
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    Über die Reaktion von DL-Glycerinaldehyd und seinem Diäthylacetal mit N.N-Bis-(ß-chloräthyl)-hydrazin (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 32 (1966), S. 125-129 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Aus einer wäßrigen Lösung von monomerem DL-Glycerinaldehyd wird durch Reaktion mit N,N-Bis-(β-chloräthyl)-hydrazin in schwach alkalischem Medium das entsprechende Hydrazon in nicht analysenreinem Zustand gewonnen. DL-Glycerinaldehyd wie auch sein Diäthylacetal bilden dagegen beim Erhitzen mit N,N-Bis-(β-chloräthyl)-hydrazin-hydrochlorid in methanolischer Lösung in mäßiger Ausbeute β-[N,N-Bis-(β-chloräthyl)-hydrazino]-acrolein-N,N-bis-(β-chloräthyl)-hydrazon-hydrochlorid (I), dessen Struktur durch Synthese aus β-Äthoxy-acrolein-diäthylacetal und N,N-Bis-(β-chloräthyl)-hydrazin-hydrochlorid bewiesen wurde. Zur Bildung von I wird eine Dehydratisierung des Glycerinaldehyds bzw. seines Acetals unter Eliminierung der α-ständigen OH-Gruppe angenommen, wobei intermediär β-Hydroxyacrolein bzw. ein Derivat davon entsteht. Methylglyoxal, das bisher als einziges Dehydratisierungsprodukt des Glycerinaldehyds bekannt ist (Eliminierung der β-ständigen OH-Gruppe), und auch 1,3-Dihydroxyaceton liefern unter gleichen Bedingungen kein I. Dagegen tritt, besonders stark bei der Umsetzung mit Dihydroxyaceton, eine Spaltung der N-N-Bindung des Hydrazin-Lostes ein.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660320303
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  • 69
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    Über 2,5-Diketopiperazine, II. Die Umsetzung des 2,5-Diketopiperazins mit Aldehyden und Nitrosoverbindungen (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 32 (1966), S. 158-166 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In der vorliegenden Arbeit wurde die Reaktionsfähigkeit der beiden Methylengruppen im 2,5-Diketopiperazin durch die Umsetzung mit aromatischen, heterocyclischen und aliphatischen Aldehyden eingehend untersucht. Dabei konnte festgestellt werden, daß auch aliphatische Aldehyde mit in Nachbarschaft zur C=O-Bindung stehenden aktivierenden Gruppen mit 2,5-Diketopiperazin reagieren. Ebenfalls war es möglich, Nitrosoverbindungen auf diese Weise zur Umsetzung zu bringen. Einige Benzylidenderivate wurden reduktiv in die entsprechenden Benzylderivate überführt.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660320307
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  • 70
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    Reaktionen mit organischen Aziden, III. Über die Gasphasepyrolyse von AklylazidenAnm. bei der Korrektur: Photolyse von Alkylaziden siehe R. M. MORJARTY u. M. RAHMAN, Tetrahedron 21, 2877 (1865). (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 32 (1966), S. 178-189 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Acht verschiedene Alkylazide wurden bei Temperaturen zwischen 350 und 410°C im Argonstrom zersetzt; die mittlere Verweilzeit betrug 5-10 sec. Die primär gebildeten Alkylnitrene stabilisieren sich vorzugsweise unter 1,2-Hydridverschiebung, daneben treten in geringerem Ausmaß 1,2-Umlagerungen unter Wanderung einer Alkylgruppe auf. Bei der Zersetzung von tert.-Butylazid, wo eine 1,2-Hydridverschiebung nicht möglich ist, wird die nucleophile 1,2-Umlagerung unter Wanderung einer Methylgruppe zur Hauptreaktion. Intramolekulare C-H-Einschiebungsreaktionen unter Bildung von Pyrrolidinderivaten konnten nicht nachgewiesen werden. Intramolekulare C-H-Einschiebungen unter Bildung von Aziridinen traten in geringem Umfang bei der Zersetzung von Isobutyl- und tert.-Butylazid, in beträchtlichem Maße bei der Zersetzung von Äthylazid auf.Bei der Gasphasepyrolyse in Gegenwart von Cyclohexan wurden dieselben Produkte erhalten wie bei der reinen Azid-Pyrolyse. Eine intermolekulare C-H-Einschiebung unter Bildung der entsprechenden Cyclohexylamine ließ sich bei Einsatz von Stickstoffwasserstoffsäure, von Methylazid und von n-Butylazid nachweisen.Das bei der Autoklav-Pyrolyse von p-Toluolsulfonylazid in Cyclohexan entstehende Nitren reagiert zu 20% unter intermolekularer C-H-Einschiebung zu N-Cyclohexyl-ptoluolsulfonamid.
    Additional Material: 6 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660320311
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  • 71
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    Über die Si—N-Bindung. XX. Darstellung von N-Trialkylsilyl-aminosäure-alkylestern. II (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 32 (1966), S. 225-229 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es werden die physikalischen Daten einiger N-Trialkylsilyl-aminosäure-alkylester mitgeteilt.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660320501
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  • 72
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    Isothiocyanate. VI. Thioamide aus Arylisothiocyanaten (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 32 (1966), S. 259-264 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Natriumverbindungen des Benzoylacetonitrils und des Benzoylacetons lassen sich in absolutem Äthanol an Arylisothiocyanate anlagern. Dimedon wird in Benzol bzw. Acetonitril in Gegenwart von Triäthylamin an Arylisothiocyanate addiert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660320506
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  • 73
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    Isothiocyanate. V. N,N′-Aryl-substituierte Dithiomalonsäurediamide. II (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 32 (1966), S. 254-258 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Als Zwischenstufe der Synthese N,N′-aryl-substituierter Dithiomalonsäurediamide aus Arylisothiocyanaten und Natriumacetylaceton in absolutem Äthanol tritt die Natriumverbindung des N-Aryl-diacetyl-thioacetamids auf. Ausgehend von dieser Zwischenstufe können durch Reaktion mit einem zweiten Molekül Arylisothiocyanat Dithiomalonsäurediamide dargestellt werden, deren N-Atome ungleich durch Arylreste substituiert sind. Derartige Verbindungen werden auch durch Umsetzen eines Gemisches zweier Senföle mit Natriumacetylaceton erhalten.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660320505
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  • 74
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    Über Ionenaustauscherharze mit komplexbildenden Ankergruppen. XXIII. Die komplexchemischen Eigenschaften eines Chelatharzes mit Sarkosin-Ankergruppen (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 32 (1966), S. 291-306 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: p. a. Sarkosin-Harz ist ein perlförmiges, helles Chelatharz auf Polystyrolbasis, das seiner chemischen Struktur nach als N-p-Polyvinylbenzyl-N-Methylaminoessigsäure anzusprechen ist. Es wird in vorliegender Arbeit hinsichtlich seiner komplexchemischen Eigenschaften gegenüber H⊕, Alkaliionen, Erdalkaliionen, Ag⊕, Cu2⊕, Ni2⊕, Co2⊕, Zn2⊕, Mn2⊕, Cd2⊕, Pb2⊕, Sn2⊕, Hg2⊕, Fe3⊕, Cr3⊕, Al3⊕, Ga3⊕, Seltenerd-Ionen, Bi3⊕, Th4⊕ und Zr4⊕ untersucht. Aus dem experimentellen Material wird eine Theorie über die Strukturen der verankerten Komplexe und die Ursache der spezifischen Eigenschaften entwickelt. Die Verwertbarkeit dieser Ergebnisse liegt auf analytischem und metallurgischem Gebiet.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660320510
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  • 75
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    Berichtigung zur Arbeit „Synthese von Amiden in der Chinazolon-Reihe“ (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 32 (1966), S. 336-336 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660320515
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  • 76
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    Über Derivate einiger Chinolincarbonsäuren (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 33 (1966), S. 39-49 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird die Synthese von Estern und Amiden der Cinchoninsäure, der 7-Chlorchinolin-4-carbonsäure, ihrer Tetrahydro- und Dekahydroverbindungen beschrieben.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660330103
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  • 77
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    Über die Darstellung von höheren Alkyl-aluminium-chloriden (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 33 (1966), S. 70-83 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Definierte höhere Alkyl-aluminium-chloride lassen sich nicht durch Reaktion der entsprechenden Alkylchloride mit Aluminium gewinnen, sondern man erhält sie, indem man höhere Trialkyl-aluminium-Verbindungen mit Aluminiumchlorid in Lösungsmittelsuspension umsetzt. Je nach den Molverhältnissen können Dialkyl-aluminium-monochloride, Alkyl-aluminium-dichloride oder sog. „Alkyl-aluminium-sesquichloride“ erhalten werden. Ausgehend von Triisobutylaluminium oder Diisobutyl-aluminium-hydrid wurden mit α-Olefinen Tri-n-alkyl-aluminium-Verbindungen dargestellt und mit Aluminiumchlorid in den Molverhältnissen 2:1 und 1:2 umgesetzt. Es wird über Darstellung, Eigenschaften und IR-Spektren von n-Hexyl-, n-Octyl- und n-Decylaluminium-chloriden berichtet.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660330107
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  • 78
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    Zur Darstellung des Natrium-p-tolytrithioarsonats (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 33 (1966), S. 108-112 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird über Darstellung, Analyse und einige Eigenschaften des Natrium-p-tolyltrithioarsonats berichtet.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660330111
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  • 79
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    Zur Darstellung von Thymin und einigen Derivaten (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 33 (1966), S. 165-167 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Anwendung neuer Reaktionsbedingungen führt zu einer deutlichen Verbesserung der Synthese des Thymins und einiger Derivate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660330309
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  • 80
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    Über Ringöffnungs- und Anlagerungsreaktionen mit Chinolyl-mercaptan-8 (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 33 (1966), S. 178-187 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Nach A. EDINGER erfolgte die Darstellung des Chinolyl-mercaptans-8 aus Chinolin; Ringöffnungsreaktionen mit heterocyclischen Dreiringen, wie Oxiran, Aziridin, Thiiran und Propenoxiden wurden durchgeführt. Die Reaktionsprodukte sollten durch Dünnschichtchromatographie und mittels der Infrarotspektroskopie untersucht sowie UV-spektroskopisch charakterissiert werden.Die neuartigen Alkohole, Thiole und Amine ergaben unter Addition an Isocyanate Carbaminsäureester, Carbaminsäurethioester und substituierte Harnstoffe.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660330311
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  • 81
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    Über p-Cymol und seine Derivate. 39. Über eine Neue Synthese von 2-Amino-p-Cymol und 2-Dimethylamino-p-cymol (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 33 (1966), S. 213-214 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird über eine neue Synthese von 2-Amino-p-cymol und 2-Dimethylamino-p-cymol aus p-Cymol in Chloramin bzw. Dimethylchloramin berichtet.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660330315
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  • 82
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    Über die Eliminierung von NOCl aus den Chlornitrosoverbindungen tetrasubstituierter Äthylene (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 33 (1966), S. 235-239 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Chlornitrosoverbindungen von Tetramethyläthylen, 1,2-Dimethylcyclopenten. 1,2-Dimethylcyclohexen, Δ9,10-Octalin, Cyclopentylidencyclopentan und Cyclohexylidencyclohexan reagieren mit Natriummethylat oder Isobutylamin in methanolischer Lösung unter NOCl-Eliminierung und Rückbildung des Ausgangsolefins. Die Eliminierung verläft nach 1. Ordnung \documentclass{article}\pagestyle{empty}\begin{document}$$ {\rm RG} = {\rm k}_1 \left[{{\rm Chlornitrosoverbindung}} \right], $$\end{document} die Aktivierungsenthalpien liegen zwischen 18 und 22 kcal/Mol, die Aktivierungsentropien zwischen -3 und -14 cal/Mol · grd. Offenbar handelt es sich um einen E-1-Mechanismus.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660330503
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  • 83
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    Über die Reaktionsfähigkeit der Methylgruppen im Osotriazolringsystem (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 33 (1966), S. 256-264 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die radikalische Bromierung von 4-Methyl-2-phenyl- und 4,5-Dimethyl-2-phenyl-2H-1,2,3-triazol liefert Monobrommethylverbindungen. Weitere Bromeinwirkung führt zur Substitution des Phenylkerns, die unter polaren Bedingungen ausschließlich erfolgt. Es werden Umsetzungen mit Brommethyltriazolen beschrieben.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660330507
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  • 84
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    Über einige Nicotinoyl-α-Aminoketone (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 33 (1966), S. 293-294 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660330511
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  • 85
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    Photochemische Oxydation des Furfurol-diäthylacetals (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 33 (1966), S. 309-314 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Nach Feststellung der Verfasser wird bei der photochemischen Oxydation des Furfurol-diäthylacetals zunächst der Furanring abgebrochen und dann die Diäthylacetalgruppe eliminiert, wobei der ψ-Ester der Maleinaldehydsäure entsteht. Beim Furfurol-divinylacetal jedoch bleibt die Eliminierung der Acetalgruppe aus, da die nach vorausgegangenem Furanringabbruch entstandene Verbindung polymerisiert.Ferner wird aufgezeigt, daß das aus dem ψ-Ester der Maleinaldehydsäure entstandene Oxim in der Tat ein Oxim der Fumaraldehydsäure ist.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660330515
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  • 86
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    Komplexe einiger Seltenerd(III)-Ionen mit der SCHIFFschen Base N,N′-Bis-(pyridin-2-al) äthylendiimin und deren FluoreszenzverhaltenHerrn Professor Dr. Leopold Wolf zum 70. Geburtstag am 23. November 1966 gewidmet (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 34 (1966), S. 30-36 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wurden die 1:1-Chelate von N,N′-Bis-(pyridin-2-al)äthylendiimin (PAen) mit Sm(III), Eu(III) und Tb(III) als Nitrate dargestellt. Aus den IR-Spektren folgt, daß sowohl der Pyridin- als auch der Azomethinstickstoff und die Nitratgruppen im festen Zustand koordinieren. Diese Aussagen werden durch die Aufnahme der Fluoreszenzspektren an den festen Chelaten und Vergleich mit den ebenfalls untersuchten 1:2-Phenanthrolin-(Phen) bzw. α,α′-Dipyridyl(Dip) Komplexen sowie durch die Temperaturabhängigkeit der Fluoreszenz erhärtet.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660340104
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    Über die Koordinationstendenz saurer NH-Gruppen. I. Metallchelate des 3-Pyridyl (2)-5-phenyl-pyrazolsHerrn Professor Dr. L. Wolf zum 70. Geburtstag gewidmet (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 34 (1966), S. 64-68 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 3-Pyridyl(2)-5-phenyl-pyrazol (C14H11N3) bildet mit zahlreichen Metallionen Chelate des wenig untersuchten Komplextyps [MeN4]±0. Die Metallchelate von Cu2+, Ni2+ und Co2+ werden eingehender beschrieben und für die diamagnetischen planaren Nickel-II-chelate Adduktbildung und mögliche Assoziationsgleichgewichte erörtert. Die Existenz von Chelaten des Typs [NiN4]2+ neben solchen der Art [NiN4]±0 eröffnet interessante strukturchemische Möglichkeiten.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660340108
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  • 88
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    Electronic Resource
    Eine neue Synthesemethode der Darstellung von Diarylalkylaminen (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 34 (1966), S. 312-334 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird eine neue Synthesemethode der Darstellung von Diarylalkylaminen durch Umsatz von Arylalkanolaminen bzw. deren Chlorderivate mit Benzol und seinen Derivaten bei Gegenwart von Lewis-Säure, wie Aluminiumchlorid, beschrieben. Diese neue Methode ist einfach und elegant. Sie bereichert die Synthesemöglichkeiten.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660340509
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  • 89
    Electronic Resource
    Electronic Resource
    Über die Umsetzung von Chinazolon-(4)-derivaten mit Alkylenoxiden (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 31 (1966), S. 34-40 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Chinazolon-(4) und seine in 2-Stellung substituierte Derivate setzen sich mit Alkylenoxiden zu β-Hydroxyalkyl-chinazolon-(4)-derivaten um.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660310105
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  • 90
    Electronic Resource
    Electronic Resource
    Das Phasengleichgewicht flüssig-flüssig des Systems Benzol/n-Heptan/Acetonitril sowie die Phasengleichgewichte dampfförmig-flüssig der entsprechenden binären Systeme bei 20,0 °C (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 31 (1966), S. 225-239 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es werden isotherme Phasengleichgewichtsdaten dampfförmig-flüssig der binären Systeme Benzol/n-Heptan, Benzol/Acetonitril und n-Heptan/Acetonitril sowie Phasengleichgewichtsdaten flüssig-flüssig des ternären Systems Benzol/n-Heptan/Acetonitril bei 20,0 °C angegeben. Die Meßergebnisse in den binären Systemen werden unter Benutzung der Kenntnis der Binodalkurve zur Vorausberechnung von Phasengleichgewichtsdaten flüssig-flüssig im ternären System verwendet. Die Übereinstimmung zwischen vorausberechneten und gemessenen Werten ist gut.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660310501
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  • 91
    Electronic Resource
    Electronic Resource
    Die Reduktion des Anthracens mit Natrium in flüssigem Ammoniak (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 31 (1966), S. 280-292 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Anthracen wird durch Alkalimetall in flüssigem Ammoniak zu 1, 4, 5, 8, 9, 10-Hexahydroanthracen (I) reduziert. Zwischenstufen der Reduktion sind 9, 10-Dihydro-(II) und 1, 4, 9, 10-Tetrahydroanthracen (X).
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660310505
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  • 92
    Electronic Resource
    Electronic Resource
    Beiträge zur Methodik der O-Isopropyl-N-(3-chlorphenyl)-carbamat-(=CIPC-)Bestimmung (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 32 (1966), S. 20-25 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 3-Chloranilin wird mit 8 verschiedenen Komponenten gekuppelt und die Beständigkeit der höchsten Farbintensität untersucht. Nach Überprüfung der Methode von Kröller wird eine modifizierte Methode der CIPC-Bestimmung unter Verwendung der K-Säure entwickelt.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660320103
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  • 93
    Electronic Resource
    Electronic Resource
    Synthese von Amiden in der Chinazolon-Reihe (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 31 (1966), S. 140-148 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird eine Reihe neuer Amide aus 3-Amino-chinazolon-(4) sowie seiner Derivate und Carbonsäuren bei Gegenwart von Phosphoroxychlorid beschrieben. Für die Herstellung von 2-Methyl-3-amino-chinazolon-(4) wird eine neue und einfache Synthese angegeben.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660310306
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  • 94
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    Electronic Resource
    Grundlagen zur Aromatenextraktion mit Alkylformamiden. III. Phasengleichgewichtsbestimmungen an quaternären Systemen vom Typ Benzol - Nichtaromatischer Kohlenwasserstoff - Alkylformamid - Wasser unter besonderer Berücksichtigung ungesättigter Kohlenwasserstoffe als Nichtaromaten (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 31 (1966), S. 179-199 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es werden die Phasengleichgewichte von Systemen mit Benzol als Aromaten, n-Hexan, Cyclohexen, Hexen oder Hepten als nichtaromatischer Kohlenwasserstoffkomponente, einem Alkylformamid (Dimethylformamid oder Monomethylformamid) als Extraktionsmittelkomponente und Wasser bei 20 °C dargestellt. Hierbei werden die Systeme mit 14% bzw. 20% Wassergehalten in den Extraktionsmitteln besonders behandelt und an ihnen die Selektivitätsverhältnisse der verschiedenen Extraktionsmittel bei Anwesenheit der genannten Kohlenwasserstoffe gegeneinander abgewogen.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660310310
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  • 95
    Electronic Resource
    Electronic Resource
    Zum Mechanismus der Reaktion von Aminen mit Tetrachlorkohlenstoff (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 31 (1966), S. 76-83 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: An Hand von IR-Spektren und Vergleichsreaktionen zur kinetischen und analytischen Kontrolle wird ein ionischer Mechanismus für die Reaktion zwischen CCl4 und Aminen diskutiert.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660310111
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  • 96
    Electronic Resource
    Electronic Resource
    Über Lineare und cyclische Peptide der p-Aminobenzoesäure (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 31 (1966), S. 92-99 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Lineare Peptide der p-Aminobenzoesäure lassen sich nach Schutz der Aminogruppe mit dem Carbobenzoxyrest nach der gemischten Anhydrid-, Carbodiimid- und aktivierten Estermethode herstellen. Zu ihrer Cyclisierung bedient Cyclisierung bedient man sich am besten der Phosphitmethode.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660310113
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  • 97
    Electronic Resource
    Electronic Resource
    Studies on Some New Indazole and Benzimidazole Derivatives (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 31 (1966), S. 100-108 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Alkylation of 5-nitroindazole (I) with dimethyl sulphate and/or diethyl sulphate in presence of sodium hydroxide yields mixtures containing more 2-alkylated than 1-alkylated products. The action of diazomethane on 5-nitro (I) and 6-nitro-indazole (IV) was investigated. Reduction of nitroindazoles with hydrogen on Pd/charcoal proceeds smoothly. The synthesis of several new benzimidazole and indazole dye intermediates is also described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660310114
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  • 98
    Electronic Resource
    Electronic Resource
    Studies on complexes of Amino acid with Silver of normal and abnormal valencies. The System: Silver Nitrate - Glycine - Water (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 31 (1966), S. 113-122 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Conductivity, Spectrophotometry, pH and Refractive Index of the mixed solutions of Glycine and Silver Nitrate revealed the existence of 6 complexes. Three of normal valencies at (2:1, 2:3 and 1:1) molecular ratios and three of abnormal valencies at (1:2, 1:3, 1:4). All were crystallized out except (1:4) and their shapes were found out by microscopic studies.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660310301
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  • 99
    Electronic Resource
    Electronic Resource
    Über die Einwirkung von Enaminen auf Chinone. IV. Darstellung von substituierten 5-Hydroxy-benzofuranen (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 32 (1966), S. 144-157 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Bei der Umsetzung von Enaminen verschiedener Aldehyde und Ketone entstehen durch MICHAEL-Addition und intermediäre Cyclisierung substituierte 2,3-Dihydro-2-piperidino (morpholino)-5-hydroxy-benzofurane, die unter Amineliminierung in die zugehörigen Benzofurane übergeführt werden können.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660320306
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  • 100
    Electronic Resource
    Electronic Resource
    Röntgenkontrastmittel. X. Jodmethylphosphonsäure (1966)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 32 (1966), S. 317-319 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird die Herstellung der Jodmethylphosphonsäure aus Hydroxymethylphosphonsäure und HJ beschrieben. Isolierung und Reinigung erfolgt über ein Doppelsalz der Zusammensetzung ICH2PO3H2 · ICH2PO3HNa.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660320513
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