SYNTHESIS AND MOLECULAR-STRUCTURE OF THE BINUCLEAR TERT-BUTYLIMINOVANADIUM(IV) COMPLEXES [MU-NTC4H9)2V2(CH2CME3)2X2] (X = OTC4H9, CH2CME3)

Syntheses of the neopentylvanadium(V) compounds tC4H9N=V(CH2CMe3)3-n(O tC4H9)n (n = 0 (7), 1 (6), 2) are described. 6 and 7 decompose by irra diation splitting off neopentane and yielding the binuclear diamagneti c neopentylvanadium(IV) complexes [(mu-NtC4H9)2V2(CH2CMe3)2X2] [X = Ot C4H9 (8), CH2CMe3 (11)]. All compounds obtained are characterized by H -1 and V-51 NMR spectroscopy. 8 has been found by X-ray diffraction an alysis to be a binuclear complex with bridging tert-butylimino ligands and a vanadium-vanadium single bond. The complexes tC4H9N = V(CH2C6H5 )(OtC4H9)2 and [(mu-NtC4H9)2V2(CH2SiMe3)2(OtC4H9)2] (10) have been als o prepared; the crystal structure of 8 and 10 are nearly identical.