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  • 2020-2023
  • 1970-1974  (1,459)
  • 1965-1969  (1,114)
  • 1945-1949  (87)
  • Chemistry  (2,660)
  • Industrial Chemistry  (48)
  • 1
    Electronic Resource
    Electronic Resource
    Complexes of metallons with phosphorus or arsenic containing ligands. II. complexes ortho-carboxyphenyltertiaryarsines with mercury (II) halides (1970)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 373 (1970), S. 64-68 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Ortho-carboxyphenyldimethylarsin(CPDMA). o-Carboxphenyldiphenylarsin (CPDPA) und o-Carboxyphenyl-di(p-toly)-arsin (CPDTA) reagieren mit Quecksilber(II)-halogeniden zu Komplexen HgX2L mit X = Cl, Br, J; L = Ligand. Nach IR-Spektren enthält HgCl2 · CPDPA wahrscheinlich den Liganden als zweizähnige Gruppe in einer dimeren halogen-verbrückten Struktur, während der jeweilige Ligand in den anderen acht dargestellten Komplexen einzähnig wirkt. Allen neun Komplexen wird tetraedrisch koordiniertes HgII zugeschrieben.
    Notes: Ortho-carboxyphenyl-dimethylarsine (CPDMA), ortho-carboxpyhenyldiphenylarsine (CPDPA) and ortho-carboxyphenyldi(p-tolyl)arsine (CPDTA) react with mercury(II) halides to yield complexes having the formula HgX2L where X is Cl, Br or I and L is ligand. In view of infrared spectral data these complexes have been classified into two classes: (a) those in which the carboxyl group of the ligand remains free (ligand being monodentate), and (b) those in which the ligand acts as a bidentate group. The complex Hg(Cl2) · CPDPA is the only example of type (a) and has been assigned a dimeric halogen bridged structure. The remaining eight complexes are assumed to be monomeric. A tetrahedral structure is proposed for all the nine complexes.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19703730110
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  • 2
    Electronic Resource
    Electronic Resource
    Complexes of metal ions with phosphorus or arsenic containing ligands. I. Complexes of Orthocarboxyphenyl Tertiary Arsines with zinc(II) and cadmium(II) (1968)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 363 (1968), S. 207-212 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Es wurden Zn- und Cd-Komplexe mit den Liganden o-Carboxyphenyl-dimethylarsin, o-Carboxyphenyl-diphenylarsin und o-Carboxyphenyl-di(p-tolyl)-arsin dargestellt. Cd ergibt mit allen drei Liganden polymere, offenbar oktaedrische Komplexe der allgemeinen Zusammensetzung M(OOC·C6H4·AsR2)2, während dies beim Zink nur bei den beiden beiden letzteren Liganden der Fall ist. Mit dem Dimethylarsin bildet Zink einen Komplex Zn(OOC·C6H4)·AsMe2·Me2As·C6 H4COOH mit Fünferkoordination.
    Notes: The complexes of zinc(II) and cadmium(II) have been prepared with the ligands o-carboxyphenyldimethylarsine, o-carboxyphenyldiphenylarsine and o-carboxyphenyldi(p-tolyl) arsine. The complexes of cadmium(II) with all the ligands and that of zinc(II) with the latter two have been assigned the general formula M(OOC·C6H4·AsR2)2 and appear to be octahedral due to their polymeric nature. Zinc(II) forms complex, Zn(OOC·C6H4·AsMe2)2·Me2 As·C6H4COOH, with the first ligand which is pentacoordinated.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19683630315
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  • 3
    Electronic Resource
    Electronic Resource
    Studies on the formation of complex compounds between rare earth nitrate and uranyl nitrate. The System: Ce(NO3)3—UO2(NO3)2—H2O (conductance, pH, spectrophotometry, refractive-index) (1965)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 29 (1965), S. 1-7 
    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 of a series of mixed solutions of uranyl nitrate and cerous nitrate indicate, the existence of the following compounds .A set of 22 mixed solutions was prepared by following NAYAR and PANDE's mono-variation method. In all the solutions the concentration of uranyl nitrate was kept constant (i. e. M/100) while that of cerous nitrate varied systematically from 0.0 M to 0.042 M. The physico-chemical properties, namely conductance, pH Spectrophotometry and refractive-index were used for the investigation of complex-compounds in the above system. When these values were plotted against the varying concentration of cerous nitrate two breaks were obtained in the regular curves at concentrations corresponding to the compound having the above formulae. The results obtained by all these physico-chemical studies are in excellent agreement leading to the same conclusions.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19650290101
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  • 4
    Electronic Resource
    Electronic Resource
    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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  • 5
    Electronic Resource
    Electronic Resource
    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.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19660310109
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  • 6
    Electronic Resource
    Electronic Resource
    Substituted Benzimidazoles as Possible Antitubercular Compounds (1969)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 311 (1969), S. 187-189 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19693110132
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  • 7
    Electronic Resource
    Electronic Resource
    Electrometric Study on Cu(II), Hg(II), and Ag(I) Complexes of Furfuryl Mercaptan and the determination of their solubility products (1974)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 316 (1974), S. 517-519 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Furfuryl mercaptan has been found to form soluble and sparingly soluble complexes with metals. The composition and stabilities of the soluble complexes of uranyl [1], zinc [2], thorium [3], lanthanum and cerium [4] have already been reported by the authors. The present communication describes the composition of sparingly soluble complexes of Cu(II), Hg(II) and Ag with furfuryl mercaptan by amperometric, condutometric and potentiometric methods and the determination of their solubility products by polarographic technique applying RINGBOM's method.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19743160323
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  • 8
    Electronic Resource
    Electronic Resource
    Electrical and magnetic properties of some organic charge transfer complexes (1972)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 4 (1972), S. 449-451 
    Details
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Two 7,7,8,8-tetracyanoquinodimethane (TCNQ) complexes with cystein and guanine have been investigated. EPR spin signals of these charge transfer complexes were recorded and the electron spin lattice relaxation time (T1) temperature dependence was investigated. The electron scattering time, calculated from T1, agreed reasonably well with that from the current carrier effective mass (as determined through the Hall mobility measurements).
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1270040403
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  • 9
    Electronic Resource
    Electronic Resource
    A mass spectrometric study of 4-hydroxy-6-methyl-2-pyridone and its derivatives (1971)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 5 (1971), S. 743-750 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The mass spectra of 4-hydroxy-6-methyl-2-pyridone, its N-methyl and N-phenyl derivatives, and also their 4-O-acetyl and 3-C-acyl derivatives have been studied. The proposed fragmentation pathways were supported by comparison of the mass spectra and in some cases by the spectra of deutero analogues. A strong N-phenyl group effect has been found, which in the case of N-phenyl-4-hydroxy- and N-phenyl-4-acetoxy-6-methyl-2-pyridones promotes the formation of the stable [M - H]+ and [M - CH3CO]+ ions respectively. These ions are not characteristic of the N - H and N - Me analogues.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210050613
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  • 10
    Electronic Resource
    Electronic Resource
    13C, 14N, 15N and 17O NMR spectra of the charged species of nitropyrroles and nitroimidazoles (1972)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 4 (1972), S. 197-202 
    Details
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Changes in 13C and 14N chemical shifts of the nitro derivatives of nitrogen heterocycles upon ionization (anion or cation formation) are twofold - first a uniform paramagnetic or in the case of protonation, a uniform diamagnetic shift of all the ring resonances that parallels the changes in the respective ultraviolet spectra and must be caused by changes in the molecular excited states, and second - the influence of the conjugated nitro group. About one third of the total negative anion charge may be localized on the nitro group, which causes unusually large shifts of the ring 13C resonances in this case.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1270040202
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