Abstract
A kinetic method for measuring the relative rates of hydroxylation of
naphthalene derivatives/cyclohexene has been developed. With this
technique a linear relationship between the logarithm of the rates of
oxidation products and the oxidation potentials of the naphthalene
derivatives has been observed. Plots of sigma Hammett and sigma(+)
Hammett-Brown with logarithm of relative rates have been linear and
shown rho = -0.98 and rho(+) = -0.58, respectively. This contrast
aromatic oxidation in protic solvents in which the oxidation products
are naphthoquinones and provides further evidence for the intermediacy
of carbocation in the hemin catalyzed hydroxylation of aromatic rings.
(C) 2004 Elsevier B.V. All rights reserved.
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