Abstract
A kinetic study of the oxidation of octacyanomolybdate(IV) by peroxynitrite has been performed using a stopped-flow technique. The variation of kobs with the concentration of Mo(CN)48-, pH and temperature have been investigated. A reaction mechanism that involves homolysis of HOONO to form •OH and •NO2 radicals is proposed. Octacyanomolybdate(IV) is oxidised by HOONO (direct oxidation) and by the aforementioned radicals (indirect oxidation). The rate constants for HOONO homolysis (k1) and direct oxidation (k2) have been obtained along with the activation parameters of these steps.
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