Effect of mixed methyl ketones on the catalyzed resorcinol based oscillatory reaction at different temperatures

A Kinetic Study on Catechol‐Based Belousov–Zhabotinsky Reaction

“…This dependence of the oscillatory characteristics such as the induction period and time period is justified on the basis of the FKN mechanism 3,4, according to which the overall BZ reaction may be divided into the following three processes: consumption of bromide ion (process A), an autocatalytic reaction of bromous acid with the oxidation of catalyst (process B), and an organic reaction with the reduction of the catalyst (process C) From the data recorded in Table II, it is observed that with an increase in [BrO − 3 ], the induction period decreases. It is assumed that with an increase in the bromate concentration there is faster accumulation of the bromoderivative of aromatic substrate, thereby, shortening the induction period 19–21. The bromate chemistry harbors the autocatalytic step, which involves the single electron oxidation carried out by BrO 2 • .…”

“…Activation parameters such as enthalpy of activation (Δ H # ) and entropy of activation (Δ S # ) (Table VI) are calculated from the apparent value of activation energy obtained from the inverse of the induction period against the inverse of a time plot and the inverse of the time period of oscillations against the inverse of the time plot using the Eyring–Polanyi equation 21,31,32. The values of enthalpy and entropy of activation are apparent, or experimental values do not correspond to any elementary reaction step.…”