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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: The Preparation of Silylated Alkylene-Bisiminophosphoranes and the Cyclisation with Phosphorus(V) Fluorides thereofNew silylated bisiminophosphoranes of the type Ph2P(NSi(CH3)3)(CH2)n Ph2P(NSi(CH3)3) 2a, b and c (n = 1, 2, 3) and the similary structured cyclic siline 5 are prepared by reaction of the corresponding alkylene-bisphosphines with silylazides.Using etheric HCl, the opened chain compounds 2a and b, are desilylated; they undergo condensation reactions with fluorophosphoranes PhxPF5-x(x = 0, 1) - the same as 5 - splitting off fluorosilane forming the partially fluorinated ionic diphosphaza-phosphonium ring systems 7a, b and 8.
    Notes: Die Synthese neuartiger, silylierter Bisiminophosphorane des Typs Ph2P(NSi(CH3)3)—(CH2)(n)—PPh2(NSi(CH3)3) 2a, b und c mit n = 1, 2, 3 und des analog gebauten cyclischen Silins 5 erfolgt durch Umsetzung der betreffenden Alkylenbisphosphine mit Silylaziden. Die offenkettigen Vertreter 2a und b werden von ätherischer HCl desilyliert; sie kondensieren - ebenso wie 5 - mit den Fluorphosphoranen PhxPF5-x(x = 0, 1) unter Fluorsilanabspaltung zu den ionischen, partiell fluorierten Diphosphazaphosphonium-Ringsystemen 7a, b und 8. Die Identifizierung und Charakterisierung der Reaktionsprodukte erfolgt vor allem durch 19F- und 31P-NMR-Spektroskopie.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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