SPECTROSCOPIC, ELECTROCHEMICAL AND QUANTUM-MECHANICAL INVESTIGATIONS OF VANADYL(IV)-ACETYLACETONATE IN NONAQUEOUS SOLUTIONS

Adduct formation between bis(acetylacetonato)oxovanadium(IV), (VO(acac)2), and various solvents has been studied. Electronic, IR- and Far IR spectra are reported and interpreted in terms of solvate formation. Formation constants are estimated from Far IR-spectra. Evidence was obtained for a cis-trans-equilibrium of pyridine solvates in solution. The 1:1-adducts with pyridine, N,N-dimethylformamide, N,N-dimethylacetamide and dimethylsulfoxide were obtained in crystalline form. Acetonitrile, acetone and diethylketone formed non-stoichiometric solvates. Cyclic voltammetric data in different solvents are reported and interpreted.