Seven Co-ordinate Vanadium Complexes with Metal-to-metal Bonds

Abstract

IN contrast with the dimeric carbonyls of transition metals with odd atomic number, hexacarbonylvanadium, with the electron configuration d⁵, is mononuclear and paramagnetic with one unpaired electron. It is of interest to enquire, therefore, whether: (1) by partial substitution of the carbonyl groups, dimeric compounds containing vanadium–vanadium bonds can be stabilized; (2) complexes containing M-V(CO)₆ groups (M = Cu, Ag, Au), analogous with other complexes recently described¹, can be prepared. The corresponding halides are unknown.