Synthesis and characterization of a tetraradical-containing octanuclear vanadium cluster formed via ligand C–N bond breaking and C–O bond making†
A tetraradical-containing octanuclear vanadium cluster (V8, complex 2) was synthesized by reacting N(2-methoxyanilino)-3,5-di-tert-butylphenol and VOSO4·5H2O in the presence of Et3N in MeOH. The reaction proceeded via a ligand centre C–N bond cleavage and C–O bond formation. The V8 cluster was comprised of two identical V4 clusters where one V4 cluster was replicated by the other by an inversion centre. A strong antiferromagnetic coupling between the two V4 clusters, having S = 1/2 spin state each, provided a diamagnetic ground state.