Electrochemical data for complexes 1–4 in acetonitrile solution^a.

Complex	Oxidation: E1/2, V (ΔEp, mV)	Reduction: E1/2, V (ΔEp, mV)
1	1.02 (81)	−1.62 (67)	−1.81 (71)	−2.03 (68)
2	1.00 (90)	−1.62 (76)	−1.81 (78)	−2.04 (73)
3	1.00 (71)	−1.64 (62)	−1.82 (64)	−2.06 (63)
4	1.00 (87)	−1.65 (84)	−1.83 (76)	−2.07 (76)

^a V vs. Ag/Ag⁺; scan rate = 100 mV s⁻¹, ΔE_p = |E_pa − E_pc| while E_1/2 = (E_pa + E_pc)/2.