Transfer coefficients and standard reduction potentials of disulfides.

RSSRa	E p b , c/V	α b , d	E 0 e/V	E 0–Ep	λ h/eV
1	−2.13	0.27	−1.68 ± 0.05	0.45	1.20
2	−1.81	0.24	−1.43 ± 0.01	0.38	1.16
3f	−1.84	0.20	−1.38 ± 0.05	0.46	1.33
4	−1.94	0.20	−1.45 ± 0.04	0.49	1.09
5	−1.95	0.21	−1.83 ± 0.02	0.12	0.77
6	−2.32	0.22	−1.90 ± 0.05	0.42	1.21
7	−2.37	0.28	−2.06 ± 0.01	0.31	0.95
8	−2.09	0.22	−1.77 ± 0.01	0.32	1.02
9	−1.84	0.21	−1.17 ± 0.05	0.67	1.53
10	−2.18	0.26	−1.90 ± 0.02	0.28	1.00
11	−1.92	0.21	−1.28 ± 0.08	0.67	1.53
12	−2.30	0.25	−1.96 ± 0.06	0.34	1.11
13g	−1.40	0.33	−1.12	0.28	1.10
14	−1.53	0.23	−1.20 ± 0.02	0.33	1.06

^aCompounds shown in Fig. 3.

^bCyclic voltammograms recorded on anhydrous acetonitrile solutions containing 1.5 mM RSSR and 0.1 M tetrabutylammonium hexafluorophosphate (Fig. S1A).

^cCathodic peak potential vs. NHE.

^dCalculated from eqn (7).

^e E ⁰ determined from extrapolation of E_p–α plots to α = 0.5 (Fig. S1B).

^fData for compound 3 taken from ref. 24.

^gData for compound 13 taken from ref. 20.

^h λ determined from the slope of of E_p–α plots.