Simulations of mediated C2O4 2-oxidation using DiMeFc/DiMeFc + in the absence of 4-BrBN were first considered. Figure shows a comparison of experimental (solid lines) and simulated (dashed lines) voltammetric responses for solutions containing 0.9 mM DiMeFc and 0.0 (black), 2.2 (red), 5.5 (blue), and 7.5 (green) mM C2O4 2-. All thermodynamic, kinetic, and transport parameters used in these initial simulations are presented in Table . Table shows rate constants for eqs 13-15 obtained in this work by fitting the simulations to experimental CVs. All CVs in In the absence of C2O4 2-, a simple, reversible 1e -response associated with the DiMeFc 0/+ redox couple, eq 12, is obtained. The standard redox potential of DiMeFc 0/+ was measured as -0.10 V vs Fc/Fc + , Figure . Values of the transfer coefficient (𝛼) and heterogeneous rate constant (k 0 ) of 0.5 and 0.97 ± 0.08 cm/s, respectively, have been reported in acetonitrile and were used without modification in the simulations, assuming a Butler-Volmer kinetic model. A diffusivity (D) of 9.2 x 10 -6 cm 2 /s was used for both DiMeFc and DiMeFc + and is based on the reported value in acetonitrile of 1.94 (± 0.04) x 10 -5 cm 2 /s. Details for adjusting D in acetonitrile to D in DMF based on solution viscosity are presented in the Supporting Information. For the moderate scan rates employed in this study, 𝜐 = 50 to 250 mV/s, a reversible CV typical of a diffusion-limited process is always obtained for a solution containing 0.9 mM DiMeFc, see Figure .