Oscillations in the bromomalonic acid/bromate system catalyzed by [Ru(phen)(3)](2+)

We investigated the oscillatory behavior of a BZ system with bromomalonic a cid and bromate as substrates and with [Ru(phen)(3)] SO4 as a catalyst. The observed oscillations can be well modeled with a theory based on two diffe rent feedback loops originally developed for a corresponding BZ system with [Ru(bipy)(3)] SO4 as a catalyst. Furthermore, we have reexamined the decom position of acidic bromate. We conclude that the products of this reaction are HOBr and O-2 rather than HOBr and perbromate; the rate constant for the decomposition reaction turns out to be 1000 times smaller for 1 M sulfuric acid solution than expected from earlier experiments performed with 3 M su lfuric acid solutions.