Electrochemical behaviour of merdional tris(2-pyridinethiolato)cobalt(III) in dimethylformamide solution

Abstract

Electrochemical behavior of mer-tris(2-pyridinethiolato)cobalt(III) in dimethylformamide was studied on a platinum electrode by means of cyclic voltammetry, chronoamperometry, and chronocoulometry. It was found that the neutral complex molecule was electroactive between the potential region of 1.0 and -1.2 V vs. a nonaqueous Ag/Ag+ electrode. The Co(III) complex was reversibly reduced to Co(II) species by one-electron transfer at about -1.1 V, followed by an irreversible dissociation reaction. However, the oxidation process at around 0.8 V, was responsible for an irreversible two-electron transfer that occurred at a ligand site.