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  • 1
    ISSN: 0044-2313
    Keywords: Neopentyl complexes of vanadium(V,IV) ; syntheses ; 1H, 51V-NMR ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Molecular Structure of the Binuclear tert-Butyliminovanadium(IV) Complexes [(μ-NtC4H9)2V2(CH2CMe3)2X2] (X = OtC4H9, CH2CMe3)Syntheses of the neopentylvanadium(V) compounds tC4H9N=V(CH2CMe3)3-n(OtC4H9)n (n = 0 (7), 1 (6), 2) are described. 6 and 7 decompose by irradiation splitting off neopentane and yielding the binuclear diamagnetic neopentylvanadium(IV) complexes [(μ-NtC4H9)2V2(CH2CMe3)2X2] [X = OtC4H9 (8), CH2CMe3 (11)]. All compounds obtained are characterized by 1H and 51V NMR spectroscopy. 8 has been found by X-ray diffraction analysis to be a binuclear complex with bridging tert-butylimino ligands and a vanadium - vanadium single bond. The complexes tC4H9N=V(CH2C6H5)(OtC4H9)2 and [(μ-NtC4H9)2V2(CH2SiMe3)2(OtC4H9)2] (10) have been also prepared; the crystal structure of 8 and 10 are nearly identical.
    Notes: Die Darstellung der Neopentylvanadium(V)-Verbindungen tC4H9N=V(CH2CMe3)3-n(OtC4H9)n [n = 0 (7), 1 (6), 2] wird beschrieben. 6 und 7 zersetzen sich photochemisch unter Abspaltung von Neopentan und Bildung der zweikernigen, diamagnetischen Neopentylvanadium(IV)-Komplexe [(μ—NtC4H9)2V2(CH2CMe3)2X2] [X = OtC4H9 (8), CH2CMe3 (11)]. Alle dargestellten Verbindungen werden 1H— und 51V-NMR-spektroskopisch charakterisiert. Die Röntgenstrukturanalyse von 8 zeigt einen zweikernigen Komplex mit verbrückenden tert-Butylimino-Liganden und einer Vanadium - Vanadium-Einfachbindung. Darüber hinaus wurden die Verbindungen tC4H9N = V(CH2C6H5)(OtC4H9)2 und [(μ-NtC4H9)2V2(CH2SiMe3)2(OtC4H9)2] (10) synthetisiert; die Kristallstrukturen von 8 und 10 sind nahezu identisch.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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