The oxidation of hydroxylamine by lodate or periodate: an oligo-oscillatory reaction

Abstract

In the oxidation of hydroxylamine with either iodate or periodate three extrema on the iodide concentration versus time curves may be found. Perturbing the periodate oxidation with malonic acid increases the number of extrema to five. Taking into account the five rate equations of the component reactions, all except one of which can be independently obtained, and considering the inhibitory effect of iodate on the iodine–hydroxylamine reaction, good agreement has been found between the calculated and experimental change in concentrations of iodide, iodine, and nitrous acid. These reactions are the first oligo-oscillatory ones in which only one oxidant and one reductant is involved initially.