Reduction potential of the carboxyl radical anion in aqueous solutions

…, SP Mezyk, DA Armstrong

Index: Surdhar, Parminder S.; Mezyk, Stephen P.; Armstrong, David A. Journal of Physical Chemistry, 1989 , vol. 93, # 8 p. 3360 - 3363

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Citation Number: 73

Abstract

The reduction potential for the'COT radical anion has been determined by equilibration of formate with sulfhydryl radicals of@-mercaptoethanol, penicillamine, and lipamide in aqueous solutions at pH 3-6. The reaction'CO,+ e-+ H+= HCOT yields the value Eo9= 1.49 V with an uncertainty of i0. 06 V. On the basis of this value and the known free energies of C02 (aq) and HC0,-(aq), EO19 for C02+ e-= TO2-was found to be-1.85 V.

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