Periodic CO and CO2 Evolution in the Oscillatory Briggs-Rauscher Reaction

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• 作者：Gabriella Szab&oacute ; Alexandra Csavd&aacute ; ri ; Lavinia Onel ; Gelu Bourceanu ; Zolt&aacute ; n Noszticzius ; Maria Wittmann
• 刊名：Journal of Physical Chemistry A
• 出版年：2007
• 出版时间：February 1, 2007
• 年：2007
• 卷：111
• 期：4
• 页码：610 - 612
• 全文大小：67K
• 年卷期：v.111,no.4(February 1, 2007)
• ISSN：1520-5215

文摘

While various reactions in the inorganic subset of the oscillatory Briggs-Rauscher (BR) reaction were clarifiedin the recent years, the organic subset of the present mechanisms contains only one process: the iodinationof malonic acid. Further organic reactions can play a role, however, if malonic (MA) and iodomalonic (IMA)acids can be oxidized in the BR reaction. As CO₂ and CO should be products if such oxidations can takeplace, the main aim of this work was to learn whether these gases are produced in a significant amount in aBR system. In our BR experiments, a rather intense evolution of both gases was observed with an oscillatoryand a nonoscillatory component. With the initial conditions applied here, one from every 6 carbon atoms wasoxidized either to CO₂ or to CO in the course of the BR reaction. The amount of CO₂ was about 4 timeshigher than that of CO. Experiments are in progress to disclose the reactions which generate the measuredgases and their role in the mechanism of the BR reaction.