| Abstract: | A general equation is derived for the shift in half wave potential, ΔE
, for ligand reduction on complexation with a metal. The formation of several complexes with differing stoichiometry and protonation states is considered explicitly. The dependence of ΔE
on metal ion concentration, holding the ligand concentration constant, can be used to determine stability constants or their ratios. The meaning of ΔE
depends on the stoichiometric changes following ligand oxidation state change, in a manner analogous to the case where the metal is the redox site. |
