Abstract
A mechanism is proposed for the reaction between brómate and iodideions in acidic solution. The mechanism consists of 13 elementary steps and involves the interhalogen compound IBr but does not contain any radical species. Extensive numerical simulations show that the mechanism gives good agreement with the observed “clock”behavior in batch and with the bistability and oscillations observed in a CSTR.The present system appears to be the first in which bistability between a stationary and an oscillatory state has been successfully described by a mechanism consisting of elementary steps.