为了给有机合成反应路径提供有利的依据,用分光光度法研究了在298.2～313.2 K的碱性介质中二过碘酸合铜(Ⅲ)(DPC)酸根配离子氧化1,3-丙二胺(PDA)的反应动力学及机理.实验结果表明:反应对氧化剂DPC是一级,对还原剂PDA的表观反应级数(nap),1<n_(ap)<2时准一级速率常数k_(obs)随[OH~-]增大而增大,碘酸根离子对反应速率起阻碍作用,且离子强度对反应有弱的负盐效应.据此提出了氧化反应的机理并求出了速控步骤的速率常数及298.2 K时的活化参数.
In order to provide a strong basis for the path of organic synthesis, the kinetics of oxidation of 1,3-propanediamine (PDA) by diperiodatocuprater(Ⅲ) (DPC) in alkaline medium have been studied by spectrophotometry in a temperature range of 298.2～313.2 K. The reaction showed pseudo-first order with respect to DPC and 1
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