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  • Polymer and Materials Science  (1)
  • 1
    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: It could be shown by a detailed 1H-NMR-study of suitable model compounds that also in the isolated dissolved molecule of N-phenylphthalimide the nitrogen atom is subject of a stationary sp2-hybridization with strong planar geometry of the three σ-bonds. From this molecular structure it can be concluded, that the polyimide of pyromellitic acid, poly(pyromellitdiimido-4,4′-biphenylylene) (4), must have a strictly linear rod-like structure of the whole macromolecule.
    Notes: Anhand geeigneter Modellverbindungen konnte 1H-NMR-spektroskopisch nachgewiesen werden, daß sich auch am isolierten, gelösten Molekül des N-Phenylphthalimids eine zeitlich stationäre sp2-Hybridisierung mit ebener Anordnung der drei vom Stickstoff ausgehenden σ-Bindungen einstellt. Diese Bindungsverhältnisse haben für das Polyimid der Pyromellithsäure, Poly(pyromellithdiimido-4,4′-biphenylylen) (4), eine streng lineare, stäbchenförmige Struktur des Makromoleküls zur Folge.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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