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  • 1960-1964  (4)
Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 47 (1961), S. 228-229 
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 53 (1962), S. 206-207 
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 44 (1961), S. 228-240 
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: In the course of reactions of methylene glycol-, tetramethylene glycol-, hexamethylene glycol-, and diethylene glycol-bis-(2-formyl phenyl ether) with aliphatic diamines mainly linear SCHIFF bases of low molecular weight are formed. In three cases however 19-, 22-, and 23-membered cyclic SCHIFF bases were obtained which were reduced to secondary amines and these reacted with p-bromophenyl isocyanate to give the corresponding urea derivatives. When heating above their melting points the cyclic SCHIFF bases are transformed to macromolecular SCHIFF bases. These are instable in solution and are reconverted into the original cyclic SCHIFF bases.
    Notes: Bei den Umsetzungen von Methylenglykol-, Tetramethylenglykol-, Hexamethylenglykol- und Diäthylenglykol-bis-(2-formylphenyläther) mit aliphatischen Diaminen entstehen überwiegend kettenförmige niedermolekulare SCHIFFsche Basen. In drei Fällen wurden jedoch 19-, 22- und 23gliedrige cyclische SCHIFFsche Basen erhalten, die nach der Reduktion zu den sekundären Aminen mit p-Bromphenylisocyanat zu den Harnstoffderivaten umgesetzt wurden. Die cyclischen SCHIFFschen Basen gehen beim Erhitzen über ihren Schmelzpunkt in makromolekulare Poly-SCHIFFsche Basen über. Diese sind in Lösung instabil und bilden die zugrunde liegenden cyclischen SCHIFFschen Basen zurück.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 53 (1962), S. 208-209 
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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