Mono Versus Dinuclear Vanadium(V) Complexes: Solvent Dependent Structural Versatility and Electro Syntheses of Mixed-Valence Oxovanadium(IV/V) Entities in Solution.

Two mononuclear oxidovanadium(V) complexes type of [VO(L)(OMe)(MeOH)] (), [VO(L)(OMe)(MeOH)] () and two [VO] core of μ-oxidodioxidodivanadium(V) complexes (L)(O)V-O-V(O)(L) () and (L)(O)V-O-V(O)(L) () and two complexes [VO(L)(8-Hq)] () and [VO(L)(8-Hq)] () incorporating 8-hydroxyquinoline (8-hq) as co-ligand have been reported where L [()-'-(2-hydroxybenzylidene)cinnamohydrazide] and L [(2,')-'-(2-hydroxybenzylidene)-3-(naphthalen-1-yl)acrylohydrazide] are the dianionic forms of the conjugated keto-imine functionalized substituted hydrazone ligands. The μ-oxidodioxidodivanadium complexes are generated upon switching the solvent from methanol to acetonitrile. The X-ray analysis showed octahedral geometry for the mononuclear complexes , and but oxido-bridged dinuclear complexes and formed penta-coordinated square-pyramidal geometry about metal atoms.