COMPOUNDS WITH VANADIUM NITROGEN AND VANADIUM OXYGEN MULTIPLE BONDS

Vanadium nitrido complexes are generally not accessible by routes successful in rhenium and molybdenum chemistry. The vanadium-nitrogen triple bond is reactive, and easily forms phosphiniminato complexes, two of which [V(NPMe2Ph)Cl3(PMePh)2] and [V(NPMe2Ph)Cl3(PMe2Ph)2].H2O, have been structurally characterised. The compound [V(NMe)Cl3(py)2] (py = pyridine) and related alkylimido species have been synthesised. They can apparently be converted by base to alkylideneamido complexes, but the only material unequivocally and structurally characterised from such systems was [VOCl2(py)2], formed by hydrolysis.