Synthesis, crystal structure and redox properties of VO3+ hydrazone complex with alkoxide ligand

The complex VO(L)(CH3O)(CH3OH) (H2L = salicylaldehyde benzoylhydrazone) was synthesize and characterized by elemental anlyasis, IR, UV, H-1 NMR, cyclic voltammetry measurements and X-ray diffraction, The crystal belongs to monoclinic system, space group P2(1)/c, with the crystal cell dimensions a = 0. 816 1(1) gm, b = 1. 694 6(2) nm, c =1. 223 2(1) nm, beta = 104. 274(9)degrees, V = 1. 639 4(3) nm(3), M-r = 368. 26, Z = 4. Two oxygen atoms and one nitrogen atom of the tridentate hydrazone ligand are coordinated to vanadium(V) atom, forming an equatorial plane, The vanadium atom approximates to a distorted octahedral coordination sphere. The redox potentials of the title complex in different solvents follow the order: CH2Cl2<CH3CN<DMF.