Reduction of cobalt(III) complexes by intramolecular electron transfer from bound free radicals. A pulse radiolytic study

The specific rates of reduction of [Co(NH₃)₆]³⁺ by a series of nitrobenzoate and nitrogen heteroaromatic anion radicals are reported. The rates of intramolecular electron transfer from the same anion radicals to a central cobalt-(III) bound to them via a carboxylate group are reported, as well as for some pyrazine carboxylate anion radicals bound to the cobalt via the carboxylate and the N¹ atom. The factors affecting the rate of intramolecular electron-transfer processes are discussed in detail.