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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: Contributions to the Chemistry of Phosphorus. 179. Triisopropyl-undecaphosphane(3), P11(i-Pr)3 - Preparation, Properties, and Molecular DynamicsTriisopropyl-undecaphosphane(3) (1) has been obtained by reacting i-PrPCl2, P4, and magnesium and subsequently thermolysing the crude reaction product, and has been isolated in pure form. According to a two dimensional 31{1H} n.m.r. spectrum 1 is a 4, 7, 11-triisopropylpentacyclo[6.3.0.02,6.03,10. 05,9]undecaphosphane. Compound 1 is formed as a mixture of two configurational isomers 1a and 1b, which differ from each other in the orientation of the isopropyl groups. When crystallizing pure 1b precipitates, which in solution is retransformed into the isomeric mixture 1a, 1b by inversion of the configuration.
    Notes: Triisopropyl-undecaphosphan(3) (1) wurde durch Reaktion von i-PrPCl2, P4 und Magnesium und anschließende Thermolyse des Rohproduktes gewonnen und analysenrein isoliert. Wie durch ein zweidimensionales 31P{1H}-NMR-Spektrum bewiesen werden konnte, ist 1 ein 4,7,11-Triisopropyl-pentacyclo[6.3.0.02,6.03,10. 05,9]undecaphosphan. Verbindung 1 entsteht als Gemisch von zwei Konfigurationsisomeren 1a und 1b, die sich in der räumlichen Anordnung der Isopropylgruppen unterscheiden. Bei der Kristallisation scheidet sich reines 1b ab, das in Lösung durch Inversion wieder in das Isomerengemisch 1a, 1b umgewandelt wird.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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