| Abstract | Electrochemical oxidation potentials of methoxy substituted benzyl, 1-naphtylmethyl, phenethyl, diphenylmethyl and cumyl radicals, substituted at the ?-, 2-, 3-, or 4-position have been measured by photomodulation voltammetry. These data are compared to ionization potentials calculated using the AM1 molecular orbital method. Although a plot of the oxidation potentials versus the AM1 ionization potentials is quite scattered, an essentially linear relationship is found for a plot of the relative oxidation potential (i.e. compared to that of the unsubstituted parent radical) and the fraction of charge in the 2pz orbital of the parent cation |
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