Abstract
The kinetics of the reduction of [Co(Ox)3]3- with catechol has been studied in aqueous acid (HClO4) medium at I = 1.00moldm-3(NaClO4) and T=26.3±0.1°C. Two moles of oxidant were consumed by one mole of reductant. The reaction is second order overall, first order in both oxidant and reductant and shows a first order direct acid dependence. Polymerisation test suggested the presence of free radicals as intermediates in the reaction. The kinetic data are consistent with the following equation: -d/2dt[Co(Ox)33-] = k2[Co(Ox)33-][H2Q]. Where k2 = ka[H+]. The experimental results are in favour of the outer-sphere mechanism.Nigerian Journal of Chemical Research Vol. 9, 2004: 35-39
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