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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 619 (1993), S. 1023-1026 
    ISSN: 0044-2313
    Keywords: Phosphorane Iminato Complex of Vanadium(IV) ; Synthesis ; Crystal Structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: [VCl3(NPPh3)(OPPh3)], a Phosphorane Iminato Complex of Vanadium(IV)The title compound has been prepared from vanadium tetrachloride and Me3SiNPPh3 in the presence of OPPh3 in CCl4 solution, forming orange-red, moisture sensitive crystals, which were characterized by an X-ray structure determination. Space group Cc, Z = 4, 2 560 observed unique reflections, R = 0.049. Lattice dimensions at 0°C: a = 1 018(1), b = 1 826(2), c = 1 859(2) pm, β = 93.65(9)° [VCl3(NPPh3)(OPPh3)] forms monomeric molecules, in which the vanadium atom is coordinated in a distorted square pyramidal fashion with the (NPPh3)- ligand in apical position. The three chlorine atoms and the oxygen atom of the OPPh3 molecule occupy the basal positions. The phosphorane iminato group V=N=PPh3 is nearly linear (bond angle VNP 161.4°), the bond lengths VN (169 pm) and PN (162 pm) correspond with double bonds.
    Notes: Die Titelverbindung entsteht aus Vanadiumtetrachlorid und Me3SiNPPh3 in Gegenwart von Triphenylphosphanoxid in CCl4. Die orangeroten, feuchtigkeitsempfindlichen Kristalle wurden durch eine röntgenographische Strukturanalyse charakterisiert: Raumgruppe Cc, Z = 4, 2 560 beobachtete unabhängige Reflexe, R = 4,9%. Gitterabmessungen bei 0°C: a = 1 018(1), b = 1 826(2), c = 1 859(2) pm, β = 93,65(9)°. [VCl3(NPPh3)(OPPh3)] bildet monomere Moleküle, in denen das Vanadiumatom eine verzerrte tetragonale Pyramide bildet mit dem (NPPh3)--Liganden in der Apicalposition. Die drei Chloratome und das O-Atom des OPPh3-Moleküls sind äquatorial angeordnet. Die Phosphaniminatogruppe V=N=PPh3 ist mit 161,4° nahezu gestreckt, die Abstände VN und PN entsprechen mit 169 und 162 pm Doppelbindungen.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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