Procedure for the determination of redox potentials of chemically (and electrochemically) irreversible inorganic redox couples from spectroscopic data

A procedure for the estimation of the redox potentials of chemically (or electrochemically) irreversible couples based on optical measurements and on the Marcus and Hush equations has been proposed and tested through the determination of redox potentials of different Co(NH3)5L3+/2+ redox couples. The results are in agreement with the expectations based on the reactivity of these complexes.