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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 109 (1976), S. 415-425 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reaction of an N-silylated Iminophosphine (Phospha(III)azene) with Halogen Compounds of Elements of Main Groups IV and VIIR2N-P=NR (R=Si(CH3)3) reacts with alkyl halides such as CCl4, i-C3H7Br, and C2H5I to give the 1,1-addition products at phosphorus, the iminophosphoranes R2N—P(X)R′= NR (3-5). Reaction of the acidic halides of silicon and tin with the iminophosphine results in the formation of the 1,2-addition products as intermediates; subsequent elimination of trimethylsilylhalide and tin dichloride, respectively, yields the diazaphosphasilacyclobutanes 6 and 7 and the iminodichlorophosphorane 10, respectively. With germanium tetrachloride, the 1,2-addition product 8 is obtained. Halogens react with the iminophosphine to produce the corresponding iminophosphoranes R2N—P(X2)=NR (X=F, Cl, Br, I) (10-13) in quantitative yields. The bromo and iodo derivatives are decomposed below 100°C and eliminate silicon halide to form the diazadiphosphetidines (RN=P(X)—NR)2 (X=Br, I) (14-15). The i. r. and n. m. r. spectra (1H. 29Si. 31P) are briefly discussed.
    Notes: R2N—P=NR (R=Si(CH3)3) reagiert mit Alkylhalogeniden wie CCl4, i-C3H7Br und C2H5J unter 1,1-Addition am Phosphor zu Iminophosphoranen R2N—P(X)R′= NR (3-5). Lewis-acide Halogenide des Siliciums und Zinns setzen sich mit dem Iminophosphin über ein intermediäres 1,2-Additionsprodukt unter Abspaltung von Trimethylsilylhalogenid bzw. Zinndichlorid zu Diazaphosphasilacyclobutanen 6 und 7 bzw. dem. Iminodichlorphosphoran 10 um. Bei der Reaktion des Germaniumtetrachlorids wird das entsprechende 1,2-Additionsprodukt 8 erhalten. Halogene überführen das Iminophosphin quantitativ in die entsprechenden Iminophosphorane R2N—P(X2)=NR (X=F, Cl, Br, J) (10-13). Das Brom- und das Jodderivat zerfallen bereits unterhalb 100°C in Halogensilan und das entsprechende Diazadiphosphetidin-diimid (RN=P(X)—NR)2 (X=Br, J) (14-15). Die IR- und NMR-Spektren (1H, 29Si 31)P) werden kurz diskutiert.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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