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Inhibition of chemical oscillations by bromide ion in the Briggs–Rauscher reaction

✍ Scribed by Rinaldo Cervellati; Barbara Mongiorgi

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
135 KB
Volume
30
Category
Article
ISSN
0538-8066

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✦ Synopsis

The addition of bromide ions to the component solutions of the Briggs-Rauscher oscillating system produces a variety of phenomena, depending on the sequence of the addition and on the initial bromide concentration. If the addition is made some minutes after the mixing of H 2 O 2 and acidic and before adding malonic acid and ions, the oscil-

IO Mn 3 lations last for five or six cycles, then suddenly ceases. If the addition is made immediately after the mixing of H 2 O 2 and acidic and before adding malonic acid and ions, the

IO Mn 3 oscillations do not start at all. The addition of bromide ions to an actively oscillating BR reaction causes a rapid suppression of the oscillations. Our observations may be accounted for by a mechanism involving the IBr species.

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