Channel electrode voltammetry and electrodimerization processes. The electro-oxidation of tris(dithiocarbamato)cobalt(III) complexes

Richard G. Compton, John C. Eklund, Lembit Nei, Alan M. Bond, Ray Colton, Yvonne A. Mah

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Abstract

Channel electrode waveshape analysis is used to demonstrate that the electro-oxidation of the tris(dithiocarbamato)cobalt(III) complexes, Co(R2dtc)3, where R = Me and Et, at platinum electrodes in acetonitrile solution proceeds via an EC2 (dimerization) mechanism in which the one-electron oxidation product, Co(R2dtc)+3, undergoes irreversible dimerization resulting in the formation of Co2(R2dtc)+5. Both the shift in half-wave potential and in the voltammetric shape as revealed by Tafel analysis are used to derive kinetic parameters for the dimerization reaction, which are found to be in excellent agreement with independently determined values.

Original languageEnglish
Pages (from-to)249-255
Number of pages7
JournalJournal of Electroanalytical Chemistry
Volume385
Issue number2
DOIs
Publication statusPublished - 4 Apr 1995

Keywords

  • Channel electrode voltammetry
  • Electro-oxidation
  • Electrodimerization
  • Tris(dithiocarbamato)cobalt(III) complexes

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