FROM ELECTRON TRANSFER TO CHEMISTRY: ELECTROCHEMICAL ANALYSIS OF ORGANOMETALLIC REACTION CENTERS AND OF THEIR INTERACTION ACROSS LIGAND BRIDGES

The determination of electrochemical potentials has been a cornerstone of electron transfer research. In one of the elementary approaches the splitting of potentials Ex and E2 for metal-based one-electron transfer in symmetrically bridged dinuclear complexes such as the Creutz-Taube ion [1-4] has been used to confirm the existence of mixed-valent species as intermediates of degenerate inner-sphere electron transfer. According to (1) and (2) the difference AE = E2 - Ej of redox potentials translates to the comproportionation constant Kc.