【摘要】 在碱性介质中用分光光度法研究了二过碲酸合铜（Ⅲ）配离子（DTC）于25～40℃区间氧化1，2-丙二醇（Pr－diol）的反应动力学。结果表明，反应对DTC为一级，对Pr－diol的表现反应级数是1．1级。准一级速率常数kobs随[OH－]增大而增大，随[TeO42-］ex(外加的TeO42-离子浓度）的增加而减小，并且有负盐效应。在氮气保护下，反应能引发丙烯腈聚合。提出了含有自由基过程的反应机理，据此导出的速率方程圆满地解释了全部实验事实，并计算出速控步骤的速率常数及相应的活化参数。更多还原

【Abstract】 The kinetics of oxidation of propanediol-1,2 by ditelluratocuprate(Ⅲ) complex ion was studied spectrophotometrically in alkaline medium in a temperature range of 25～40℃. The reaction rate showed first order dependence in oxidant and 1.1 apparent order dependence in propanediol-1, 2. It was found that the pesudo first order([Pr-diol]>>[DT C]0) rate constant,kobs, increases with the increase in[OH-] and decreases with the increase in[TeO2-4]. There is a negative ionic strength effect. Under the protection of nitrogen the reaction system can induce polymerization of acrylonitrile, a reasonable mechanism involving free redical has been proposed.All the experimental phenomena can be explained by the equation derived from the mechanism. The rate constant of the rate-determining step and the corresponding activation parameters have also been evaluated.更多还原