KINETICS OF THE ELECTROREDUCTION OF TRIS(ACETYLACETONATO) CHROMIUM(III) IN NONAQUEOUS SOLVENTS

Rate constants for the one-electron cathodic reduction of tris(acetyla cetonato)chromium(III) were determined by pulse polarographic and cycl ic voltammetric techniques at 23 degrees C in 10 organic solvents (ace tonitrile, propylene carbonate, gamma-butyrolactone, N,N;dimethylforma mide, N,N-dimethylacetamide, dimethylsulphoxide, N,N-diethylformamide, hexamethylphosphoric triamide, N-methylformamide and formamide). It h as been shown that the observed solvent dependence of the rate constan t is mostly caused by solvent relaxation dynamics, but the donor-accep tor interactions between solvent and solute should not be neglected.