the reverse of eq 8, C2O4 2-•CO2 dissociation into C2O4 2-and CO2, and eq 13, the homogeneous oxidation of C2O4 2-by DiMeFc + and the reverse of eq 10, association of C2O4 •-and CO2 to form C2O4 •-•CO2. In this scenario, eq 14 is not explicitly required to describe the overall mediation mechanism. However, CV studies and finite-difference simulations presented later support the occurrence of eq 14. Regardless of the mediation pathway, C2O4 •-forms and rapidly decomposes into CO2 and CO2 •-, eq 6. CO2 •-is then capable of reducing DiMeFc + , eq 15.