Chemistry of Belousov-type oscillating reactions

The heat output and the accumulation of monobromomalonic acid during chemical oscillation in the bromate, malonic acid, sulphuric acid and catalyst [Ce(III), Mn(II), Fe(phen)2+3, Ru(dipy)2+3] systems were measured and the results interpreted. The behaviour of the reacting oscillating systems depends to a certain extent on the catalyst applied. Both the rate of heat evolution and the rate of accumulation of monobromomalonic acid are periodic. The heat of the cerium-catalysed Belousov oscillating reaction is 130 ± 5 kJ mol–1 bromate.