Abstract
When manganese(II) is oxidized by periodateion in a flowreactor, periodic oscillation is observed in the pH,the potential of a Ptelectrode, and the absorbance over a wide range of visible wavelengths.No bistability is found.Both comparison with the behavior of permanganate oscillators and a model of the present reaction that gives good agreement with the observed oscillation and autocatalytic batch behavior suggest that the oscillations originate from the manganese chemistry.The primary roles of periodate appear to be to generate and to stabilize the higher oxidation states of manganese.havior differs significantly from that expected in systems with a unimodal distribution of bound ligands.