Table 8. Summary of the Electrochemical Data^a.

compound	E°′ (V)	compound	E°′ (V)
1	0.14	6	0.30
1O	0.27	6O	0.40
1S	0.29	6S	0.42
1Se	0.33b	6Se	0.48b

^aThe measurements were conducted at the Pt-disk electrode in dichloromethane containing 0.1 M Bu₄N[PF₆]. The potentials are given in volts relative to ferrocene/ferrocenium references (for details, see the Supporting Information). The potentials for reversible processes were determined as the average of anodic (E_pa) and cathodic (E_pc) peak potentials, E°′ = 1/2 (E_pa + E_pc). The separation of the peaks in the cyclic voltammograms was approximately 90 mV due to a large resistance. The decamethylferrocene standard showed similar values.

^bIrreversible wave. The anodic peak potential (E_pa) at a scan rate of 100 mV s^–1 is given.