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Thermochemistry of the hydroquinone/benzoquinone system (a) in water and (b) in DMSO, from Table 6. Numbers above horizontal arrows give pKa values; numbers beside vertical arrows give electrochemical potentials (vs. NHE in water and vs. Cp2Fe+/0 in DMSO); numbers bisecting diagonal lines are BDFEs in kcal mol−1. In (a), the values in parentheses were estimated by Laviron;152 in (b) the values in square brackets are estimates using eq 7 and Hess’ Law.
