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  • 1985-1989  (1)
  • 1
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Low-Coordinated Phosphorus Compounds. 59. 2,4,6-Tri-(butyl)phenylphosphaketene, a Synthon for Substituted Phospha-Carba-PolyenesReaction of 2,4,6-tri(tbutyl)phenylphosphaketene 1 with dislylphosphanes in the ratio 2:1 yields 1,3,5-triphospha-1,4-pentadienes. P-silylated 1,3-diphosphapropenes are intermediates in this reaction, which add on diphenylketene forming 1,3-diphospha-1,4-pentadienes. 1,3,5-triphospha-1,4-pentadiene 10 is formed by reaction of 1 with tris(trimethylsilyl)phosphane, the silyl-function of which can be replaced by H, Li, or Cl. The structures of the new phospha-carbadienes are confirmed by the clear synthesis, 31P-n.m.r.-spectroscopy, and partially by X-ray.
    Notes: 1,3,5-Triphospha-1,4-pentadiene werden durch Reaktion von 2,4,6-Tri(tert-butyl)phenyl-phosphaketen 1 mit Disilylphosphanen im Molverhältnis 2:1 erhalten. Dabei als Zwischenprodukt auftretende, am Phosphor silylierte 1,3-Diphosphapropene addieren sich an Diphenylketen unter Bildung von 1,3-Diphospha-1,4-pentadienen. Mit Tris(trimethylsilyl)phosphan reagiert 1 zum 1,3,5-Triphospha-1,4-pentadien 10, dessen Silylgruppe am Phosphan-P-Atom durch H, Li oder Cl ersetzt werden kann. Die Strukturen der neuen Phospha-carba-diene ergeben sich aus der übersichtlichen Synthese und sind durch 31P-NMR-Spektren, zum Teil durch Röntgenbeugungsanalyse belegt.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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