【摘要】 在碱性介质中,用分光光度法研究了Cu(Ⅲ)配合物氧化亮氨酸的反应动力学及机理.结果表明:反应对Cu(Ⅲ)为准一级,对亮氨酸为一级反应;表观速率常数随着[OH-]的增加先减小后增加,随着[IO4-]的增加而减小.据此提出了此反应的反应机理,由假设反应机理推出的速率方程能很好地解释全部实验现象,进一步求得速控步速率常数k和298.2 K时的活化参数.更多还原

【Abstract】 The kinetics of oxidation of lecucine by Cu(Ⅲ) complex in alkaline medium was studied with spectrophotometry in temperature range of 298.2～313.2 K. The reaction was found to be pseudo-first order with respect to Cu(Ⅲ) complex and to be first order to leucine.At low ,the rate decreased with the increase of ,but when increased to enough extent,the rate increased with the increase of .The rate decreased with the increase of .From the study of the reaction kinetics,the mechanism of the reaction was proposed,which can explain all the experimental results.The activation parameters of the rate-determining step and the equilibrium constant has been calculated at 298.2 K.更多还原