Rates of reactions in Cu(II)-benzoylacetone system in aqueous phase.

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The mechanism and rates of aqueous-phase reactions in cupric ion and benzoylacetone system were elucidated. The exchange reaction between enol and keto forms was expressed by ?? The rate constants for enol and keto forms were determined as kE = 81s-l and kK = 0.018s-1, respectively. The reaction rate between enolate ion and cupric ion was well interpreted by Eigen''s mechanism and the rate constant of second-order reaction was kCB = 1.1 × 109 dm3/mol•s. Direct reactions between cupric ion and the enol and keto forms of benzoylacetone were observed. The rate constants for the enol and the keto forms were 2000 and 12 dm3/mol•s, respectively.

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