REACTIVITY OF HYDRIDOCARBONYLVANADIUM COMPLEXES - SYNTHESIS AND CHARACTERIZATION OF ALKYLVANADIUM COMPLEXES AND THE MOLECULAR-STRUCTURE OF TRANS-[V(CO)2(PH2PCH2CH2PPH2)2]

Various sigma-alkylvanadium complexes of the general formula RV(CO)(n)p(m) (n = 4, 3; p(m) is an m-dentate phosphine coordinating through (6 - n) P-functions) have been prepared by photo-reaction between the hydrido precursors HV(CO)(n)p(m) and alkenes, and characterized by IR- and V-51 NMR spectroscopy. The preparation of the new phosphines Me2P(CH2)3P((i)Pr)2 and (i)PrP(CH2CH2CH2PMe2)2 is described. trans-[V(CO)2(dppe)2] crystallizes in the space group P1BAR with the following cell parameters: a = 1012.1(9), b = 1012.9(6), c = 1224.7(9) pm, alpha = 105.780(6), beta = 102.601(7)-degrees.