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  • 2020-2022
  • 1985-1989
  • 1965-1969  (6)
  • 1955-1959
  • 1965  (6)
  • Phosphorus  (3)
  • Polymers  (3)
Datenquelle
Materialart
Erscheinungszeitraum
  • 2020-2022
  • 1985-1989
  • 1965-1969  (6)
  • 1955-1959
Jahr
Schlagwörter
  • 1
    Digitale Medien
    Digitale Medien
    Sequence Distribution in Copolymers. Chemical StudiesAn article on phyical investigations of the sequence distribution in copolymers will appear shortly in this journal. (1965)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 4 (1965), S. 394-401 
    Details
    ISSN: 0570-0833
    Schlagwort(e): Copolymers ; Polymers ; Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Various chemical procedures are available for studying the sequence distribution in copolymers, but none can be applied routinely. The run-number approach permits the results of such studies to be treated with ease; all results obtained to date are consistent with classical copolymerization theory.
    Zusätzliches Material: 2 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/anie.196503941
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  • 2
    Digitale Medien
    Digitale Medien
    Color and Constitution of Azo Compounds (1965)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 4 (1965), S. 457-471 
    Details
    ISSN: 0570-0833
    Schlagwort(e): Color ; Azo compounds ; Azobisphosphoric acid ; Phosphorus ; Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Attempts to explain the surprising violet color of the new azobisphosphonic acid derivatives Y2OP—N=N—POY2 have led to the preparation and spectroscopic characterization of more than 60 azo compounds. The long-wavelength n → π* transitions on which the color depends exhibit regularities which justify the assumption of substitutent-specific absorption increments. The complex relation between color and constitution of azo compounds can be qualitatively explained with the aid of orbital models. Infrared and ultraviolet spectral data show that conjugation is inhibited by tetra-coordinated phosphorus (V). the π-system of these compounds therfore comprises only for atoms, P·N·N·P. The unexpected violet color of the phosphorus azo compounds can be ascribed to a π*/d orbital interaction. The substituent effects described have general significance, and n→π*transitions of other chromophores are similarly affected.
    Zusätzliches Material: 14 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/anie.196504571
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  • 3
    Digitale Medien
    Digitale Medien
    Sequence Distribution in Copolymers (1965)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 4 (1965), S. 1051-1060 
    Details
    ISSN: 0570-0833
    Schlagwort(e): Copolymers ; Polymers ; Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The physical properties of copolymers are determined by their compostions and by the distribution of monomeric sequences in their chains. In some cases, sequence distributions can be determined from or correlated with physical properties observed for copolymers. Such determinations or correlations are relatively simple when calculations are based on run numbers.
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/anie.196510511
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  • 4
    Digitale Medien
    Digitale Medien
    Cyclic Compounds as Configurational Models for Stereoregular Polymers (1965)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 4 (1965), S. 107-112 
    Details
    ISSN: 0570-0833
    Schlagwort(e): Configuration ; Polymers ; Tacticity ; Stereochemistry ; Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: It is possible to draw analogies between linear polymers and cyclic compounds. Stereochemical considerations developed in this connection led to the recognition of new aspects of importance for the systematic classification of both classes of compounds; for example, asymmetric structures can be predicted which had hitherto never been suspected. - The concept of “diasteric centers” is introduced, and the definition of an “asymmetric center” is expressed in more general terms.
    Zusätzliches Material: 8 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/anie.196501071
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  • 5
    Digitale Medien
    Digitale Medien
    Heterocycles Containing Phosphorus (1965)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 4 (1965), S. 1023-1038 
    Details
    ISSN: 0570-0833
    Schlagwort(e): Heterocycles ; Phosphorus ; Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The preparation of heterocycles containing phosphorus is described. The chemical behavior of ring systems containing trivalent phosphorus is mainly determined by their phosphine character; heterocyclic behavior in the ordinary sense is shown by rings containing functional groups. Syntheses and reactions of cyclic compounds of pentavalent and hexavalent phosphorus are particularly interesting.
    Zusätzliches Material: 3 Tab.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/anie.196510231
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  • 6
    Digitale Medien
    Digitale Medien
    New Products of Reaction of Organometallic Compounds with Sulfur, Selenium, Tellurium, and Phosphorus (1965)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 4 (1965), S. 1007-1013 
    Details
    ISSN: 0570-0833
    Schlagwort(e): Sulfur ; Selenium ; Tellurium ; Phosphorus ; Organometallic compounds ; Chemistry ; General Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Bond fission of molecular sulfur, selenium, and tellurium by lithiotriphenylmetal compounds (of Ge, Sn, Pb) is summarized. The products are suitable as starting materials for synthesis of new “ether analogues”. Transphenylation with tetraphenylstannane is interpreted as a high-temperature variant of the usual fission of chalcogen molecules by nucleophilic reagents. In principle, transphenylation can be applied also to other elements, as is illustrated for phosphorus. In the syntheses achieved, many of the tin-phosphorus compounds arising as intermediates can be isolated.
    Zusätzliches Material: 6 Tab.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/anie.196510071
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