M. Kitamura, K. Yamashita, H. Imai
1976
Citations
0
Influential Citations
21
Citations
Journal
Bulletin of the Chemical Society of Japan
Abstract
The electrolytic reduction of vanadyl acetylacetonate in acetonitrile solution was investigated by means of conventional and AC polarography, cyclic voltammetry and controlled-potential electrolysis. A well-defined polarographic cathodic wave was obtained in a solution containing excess acetylacetone. The wave-form was outwardly a single step with two-electron transfer. However, logarithmic analysis revealed that it consists of two steps. The first step is slightly irreversible, being accompanied by V–O bond breaking, and the second one is controlled by the rate of coupled chemical reactions. The reaction mechanism is discussed in detail. The reversible half-wave potentials of the species [VO(acac)2] and [V(acac)3] were determined to be −1.93 and −1.78 V vs. Ag/0.1 M AgClO4, respectively, from the logarithmic analysis.