Table 7. Oxidation potentials of pyrrolocarbazoles ^a .

Entry	Compound	R	Oxidation potential a
1	6aF-H	H	+0.85
2	6aF-Me2	Me	+0.79
3	7aF-H	H	+0.73
4	7aF-Me 2	Me	+0.75
5	11A-Me 2	—	+0.80 b

^a E/V vs. SCE, CH₂Cl₂ containing 0.1 M Bu₄NPF₆, Pt electrode, and 100 mV s^–1. E^ox = E^pa – 0.03 V (for entries 1–5). E(Fc/Fc⁺) = +0.53 V under similar conditions.

^bReversible redox reaction was observed.