Inorganic Chemistry 2008-12-15

Proton-coupled electron-transfer oxidation of phenols by hexachloroiridate(IV).

Na Song, David M Stanbury

Index: Inorg. Chem. 47(24) , 11458-60, (2008)

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Abstract

One-electron oxidation of phenol, 2,4,6-trimethylphenol, and 2,6-dimethylphenol by [IrCl(6)](2-) in aqueous solution has a simple pH dependence, indicating slow bimolecular oxidation of ArOH and faster oxidation of ArO(-). H/D kinetic isotope effects as large as 3.5 for oxidation of ArOH support concerted proton-coupled electron transfer with water as the proton acceptor.