Iodine-Production Subsystem of the Briggs-Rauscher Oscillating Reaction.

Article abstract of DOI:10.1021/j100213a009

The system H2O2, IO3^-, H⁺, Mn²⁺ is a subsystem (no malonic acid) of the Briggs-Rauscher oscillator.As H2O2 disproportionates, iodine is initially produced and then after a long time is reoxidized to iodate.The initial rate of iodate reduction is highly dependent on and 2+>.Whwn crotonic acid is present in the subsystem to prevent I2 from forming, the rate of iodate reduction is highly dependent on -> and 2+>, and disproportionation of H2O2 is greatly reduced.With addition of iodine-oxidation steps, the skeleton model of Noyes and Furrow, and of DeKepper and Epstein, which predicts oscillations in the full Briggs-Rauscher system, reproduces behavior of the subsystem with and without crotonic acid.The scheme also reproduces oxidation of I2 by H2O2 in the H2O2, IO3^-, H⁺, I2 system, though O2 evolution in the model is too high.