Anomalous control mechanism in a B–Z type oscillator involving fructose as organic substrate

In order to elucidate the mechanism of Ce4++BrO3−+H2SO4+fructose [F] oscillatory reaction which has no apparent bromine removal mechanism, detailed experimental studies have been undertaken to investigate (i) [Br−] at different time intervals during oscillations, (ii) effect of addition of (a) Br− during oscillations, (b) fructose and BrO3− after stoppage of oscillations and (c) tartaric acid [TA], below the lower critical limit of [F] for oscillations. A reaction mechanism has been suggested which involves active participation of free radicals and which also correctly predicts most of the observed oscillatory features.