Synthesis, molecular structure, and reactivity of a half-sandwich vanadium(III) imido complex: The first vanadium (V) alkylidene

Article abstract of DOI:10.1021/om00020a003

One of the trimethylphosphine ligands in CpV(NAr)(PMe₃)₂ (3; Ar = 2,6-C₆H₃-i-Pr₂), obtained by magnesium reduction of CpV(NAr)Cl₂ (2), can be substituted by CO, ethylene, or diphenylacetylene to give the corresponding π-acceptor (L) complex CpV(NAr)(L)-(PMe₃) (L = CO, 4; L = C₂H₄, 5; L = PhC≡Ph, 6). 3 reacts with Ph₃P=CHPh to form the first vanadium(V) alkylidene, CpV(NAr)(=CHPh)(PMe₃) (7).