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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 111 (1978), S. 1210-1216 
    ISSN: 0009-2940
    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, 73: 1,2-Diphenyldiphosphane1,2-Diphenyldiphosphane (1) is formed, contrary to results given in the literature, by the reaction of KHPPh with 1,2-dibromoethane. Pure 1 is obtained by hydrolysis or alcoholysis of Me3Si(Ph)P-P(Ph)SiMe3 in the dark. It is stable at - 30°C. 1 disproportionates at room temperature to give PhPH2, higher homologues of the series H2[PPh]n, especially H2[PPh]3, and cyclic phenylphosphanes [PPh]n, mainly [PPh]5. These rearrangements are accelerated by light, phosphides, and strong acids and bases. With K(Ph)P—P(Ph)K, Me3Si(Ph)P—P(Ph)SiMe3, and P2Ph4 1 reacts to give the asymmetric diphosphanes K(Ph)P—P(Ph)H, Me3Si(Ph)P—P(Ph)H, and Ph2P—P(Ph)H, respectively. The NMR, IR, and Raman spectra are discussed.
    Notes: 1,2-Diphenyldiphosphan (1) wird - entgegen Literaturangaben - bei der Reaktion von KHPPh mit 1,2-Dibromethan gebildet. Reines 1 ist durch Hydrolyse oder Alkoholyse von Me3Si(Ph)P - P(Ph)SiMe3 unter Lichtausschluß erhältlich und bei - 30°C beständig. Es disproportioniert bei Raumtemperatur in PhPH2, höhere Homologe der Reihe H2[PPh]n  -  insbesondere H2[PPh]3 - und cyclische Phenylphosphane [PPh]n  -  vor allem [PPh]5. Diese Umlagerungen werden durch Licht, Phosphide sowie starke Säuren und Basen beschleunigt. Mit K(Ph)P—P(Ph)K, Me3Si(Ph)P—P(Ph)SiMe3 oder P2Ph4 reagiert 1 zu den unsymmetrischen Diphosphanen K(Ph)P—P(Ph)H, Me3Si(Ph)P—P(Ph)H bzw. Ph2P—P(Ph)H. Die NMR-, IR- und Raman-Spektren von 1 werden diskutiert.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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