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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. 53. 1,2,3,4-Tetraphenylcyclo-5-thia-1,2,3,4-tetraphosphane1,2,3,4-Tetraphenyl-cyclo-5-thia-1,2,3,4-tetraphosphane (“tetraphenylcyclotetraphosphine-monosulphide„) 1 is obtained in very good yield and purity by the reaction of pentaphenyl-cyclopentaphosphane (2) with sulphur (4 C6H5P: 1 S). Further new methods of preparation are the comproportionation of 2 with (C6H5PS)3, and the reaction of dipotassium-triphenyl-cyclotriphosphide (4) with sulphur dichloride. The IR and 31P-NMR spectra of the title compound indicate unambiguously the heterocyclophosphane structure 1 with a five-membered P4S ring. The elevated stability of this ring system is evident from numerous other formation reactions, which are reported in addition.
    Notes: 1,2,3,4-Tetraphenyl-cyclo-5-thia-1,2,3,4-tetraphoshan (“Tetraphenyl-cyclotetraphosphin-monosulfid”) 1 wird durch Umsetzung von Pentaphenyl-cyclopentaphosphan (2) mit Schwefel (4 C6H5P:1 S) in sehr guter Ausbeute und Reinheit erhalten. Weitere neue Darstellungswege sind die Komproportionierung von 2 und (C6H5PS)3 sowie die Reaktion von Dikalium-triphenyl-cyclotriphosphid (4) mit Schwefeldichlorid. Das IR- und das 31P-NMR-Spektrum der Verbindung sind ein eindeutiges Indiz für die Heterocyclophosphan-Struktur 1 mit fünfgliedrigem P4S-Ring. Die besondere Stabilität dieses Molekelgerüstes geht aus der größeren Zahl weiterer Bildungs-Reaktionen für 1 hervor, über die außerdem berichtet wird.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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