Table 3. Redox potentials V vs. Fc^{+/0 a} .

E (V)	E O1	E O2	E R1	E R2
1a	0.01		–1.59	–2.07
1b	–0.18	0.47 b	–1.86	–2.38 c
2a	0.18		–1.66	–2.10
2b	–0.03	0.61 b	–1.91	–2.50 c
3a	–0.10 d	0.77 b	–2.05 d
3b	0.04 d		–1.71 d
3c	–0.17 d	0.59 b

^a E _1/2 values. 1a,b and 2a,b were measured in DMF with SCE as the reference electrode; E(Fc^+/0) = 0.49 V. 3a–c were measured in DCM with Ag/AgCl as the reference electrode; E(Fc^+/0) = 0.40 V.

^b E _p,a.

^c E _p,c.

^dQuasi-reversible.