二过碘酸合铜(Ⅲ)氧化乙醇胺的动力学及机理

The kinetics of okidation of ethanolaInine by potassium diperiodatocupate (Ⅲ) was studied spectrophotometrically in alkallne medium at 293-2-303.2K. The reaction rate showed first order dependance on Cu(Ⅲ) and positive fractiona order dependance on ethanolndne. It was fou-nd that the pesudo first-order([EA]. X[Cu(Ⅲ)].) rate constan k.b. increases with the increase of [OH-] and decreases with the increase of [IO-4].There is a negative salt effect of addtion of KNO3. The active species and a plausible mechedsm involing free redical have been proposed. All the experimental phenomena can be explaimed by the rate equation derived from the mechanism. The rate constant of the rate-determing step together with the activation paraments haye also been evaluated.

分光光度法研究二过碘酸合铜(Ⅲ)氧化丙酮酸钾的动力学

用分光光度法研究了碱性介质中二过碘酸合铜（Ⅲ） 配离子氧化丙酮酸钾的反应动力学。结果表明反应对氧化剂是准一级，对还原剂为１．６ 级，反应速率随着高碘酸根浓度的增加略有增大。并且〔 Ｐｙ〕／ｋｏｂｓ对 １／〔 Ｐｙ〕；１／ｋｏｂｓ对 １／〔 Ｈ Ｌ〕均为有正截距的直线。根据实验结果提出了一种含有前期平衡的反应机理，据此导出了一个能够解释全部实验事实的速率方程，求得了速控步的速率常数，并给出了 ２９８．２ Ｋ 时的活化参数。