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  • 1985-1989  (1)
  • 1965-1969
  • 1985  (1)
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  • 1985-1989  (1)
  • 1965-1969
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  • 1
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Untersuchungen an Phosphazenen. 18. Aminolyse-Reaktionen der Pentachloro (2′,2′,2′-triphenylphosphazen-1′-yl) cyclotriphosphazen, N3P3Cl5(NPPh3)Die Reaktionen des Pentachloro(2′,2′,2′-triphenylphosphazen-1′-yl)-cyclotriphosphazens, N3P3Cl5(NPPh3) mit primären und sekundären Aminen wurden in Diethylether, Methylcyan und Benzen untersucht. Die Strukturen der erhaltenen Verbindungen, N3P3Cl5-nRn(NPPh3) (n = 1, R = NHMe, NHBut, NMe2, NC5H10, NEt2; n = 2, R = NMe2, NC5H10, NEt2; n = 3, R = NMe2, NHBut; n = 5, R = NMe2) wurden mittels 1H- und 31P-NMR-Spektroskopie geklärt. Der —NPPh3-Substituent übt einen bevorzugt geminal dirigierenden Einfluß auf den Einbau sekundärer Aminonukleophile aus; Verbindungen, die eine ≡ PCl(NPPh3)-Gruppe enthalten, werden in der zweiten und den folgenden Stufen des Cl-Ersatzes nicht gebildet. Reaktionen mit primären Aminen erfolgen nach dem bekannten Muster der analogen Reaktionen des Hexachlorocyclotriphosphazens. Der Einfluß des Lösungsmittels und mögliche Reaktions-mechanismen werden diskutiert.
    Notes: The reactions of pentachloro(2′, 2′, 2′-triphenylphosphazen-1′-yl)cyclotriphosphazene, N3P3Cl5(NPPh3), with primary and secondary amines have been investigated using diethyl ether, methyl cyanid or benzene as the solvent. The structures of the products obtained, N3P3Cl5minus;nRn(NPPh3) [n = 1, R = NHMe, NHBut, NMe2, NC5H10, NEt2; n = 2, R = NMe2, NC5H10, NEt2; n = 3, R = NMe2, NHBut; n = 5, R = NMe2] are elucidated by 1H and 31P NMR spectroscopy. The —NPPh3 substituent exerts a pronounced geminal directing influence on incoming secondary amino nucleophiles; compounds containing a ≡ PCl(NPPh3) group are not formed at the bis and subsequent stages of chlorine replacement. The reactions that involve primary amines follow the pattern established for the analogous reactions of hexachlorocyclotriphosphazene. The effect of solvent and possible mechanism(s) are discussed.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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