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. F ormation constants are estimated from Far IR-spectra. Evidence was obt ained for a cis-trans-equilibrium of pyridine solvates in solution. Th e 1:1-adducts with pyridine, N,N-dimethylformamide, N,N-dimethylacetam ide and dimethylsulfoxide were obtained in crystalline form. Acetonitr ile, acetone and diethylketone formed non-stoichiometric solvates. Cyc lic voltammetric data in different solvents are reported and interpret ed.