The kinetics of electron-transfer reactions involving the manganese (I1) and-(III) complexes of ethylenediaminetetraacetate (edtac) and trans-l, 2-~ yclohexanediaminetetraacetate (cdta4-) have been investigated in aqueous media. The cross-reactants employed in this study are osmium and cobalt tris (po1ypyridine) complexes, IrC16>, and nickel polyaza complexes. The cross-reaction kinetic data have been correlated in terms of the Marcus ...