Kinetic study of the reactions of oxoiron(IV) with aromatic substrates in aqueous solutions

The kinetics of the reactions of oxoiron(IV) (FeO2+) with phenol, nitrobenzene. m-, o-, and p-nitrophenol in 1 M HClO4 was investigated by the stopped-flow technique The rate constants of these reactions decrease with increasing the one-electron reduction potentials of the corresponding radical cations of the substrates and with the Hammett parameter of the NO2 group in the phenol ring A reaction mechanism is proposed which accounts for the observed trends and for the nature of the reaction products (C) 2002 Wiley Periodicals, Inc.