CO2 production in the bromate‐1,4‐cyclohexanedione oscillatory reaction |
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Authors: | Jiamin Feng James R Green Samuel A Johnson Jichang Wang |
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Institution: | Department of Chemistry and Biochemistry, University of Windsor, Ontario N9B 3P4, Canada |
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Abstract: | NMR and GC/MS spectroscopy of the organic extracts of the oscillatory bromate‐1,4‐cyclohexanedione reaction illustrate the presence of ring‐opening products 5‐(dibromomethylene)‐2(5H)‐furanone, (E)‐5,5,5‐tribromo‐4‐oxo‐2‐pentenoic acid, and dibromoacetic acid, particularly at elevated temperatures. The loss of a carbon atom from the six‐membered ring after ring opening led to gas formation and such a process became more vigorous at >60 °C, with the direct observation of bubbles in a stirred batch reactor. Gravimetric experiments confirm that the amount of carbon dioxide gas produced increases rapidly with reaction temperature. Parallel experiments suggest that the ring‐opening process involves the oxidation of brominated benzoquinones by bromate. Copyright © 2010 John Wiley & Sons, Ltd. |
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Keywords: | oscillatory reaction reaction mechanism spectroscopy |
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