用分光光度法研究二过碘酸合铜(Ⅲ)配离子氧化乙二胺的动力学  

Kinetics of Oxidation of Ethylenediamine by Diperiodatocuprate(Ⅲ) Ion in Alkaline Medium

作　　者：单金缓[1,2] 申世刚[1,2] 马志广 徐雅君[1,2] 

机构地区：[1]河北大学化学系 [2]北京联合大学建材轻工学院

出　　处：《河北大学学报（自然科学版）》1998年第3期253-255,共3页Journal of Hebei University(Natural Science Edition)

基　　金：河北省自然科学基金

摘　　要：采用分光光度法研究了二过碘酸合铜（Ⅲ）氧化乙二胺的反应动力学及机理。结果表明，反应对Ｃｕ（Ⅲ）是准一级。准一级速率常数ｋｏｂｓ随乙二胺（ＥＤＡ）的浓度增大而增大，为正分数级，且１／ｋｏｂｓ对１／［ＥＤＡ］有较好的线性关系。ｋｏｂｓ随ＯＨ－［］的增大而增大；随ＩＯ－４［］的增大而减小。据此提出了包括前期平衡的反应机理，解释了实验现象，求得了速率控制步骤的速率常数。The kinetics of oxidation of ethylenediamine by diperiodatocuprate(Ⅲ) ion was studied by spectrophotometry in alkeline medium.The reaction rate showed first order dependance on Cu(Ⅲ) and positive fractional order dependance on ethylenediamine.kobs increases with the increase in and decreases with the increase in .The active species and a plausible mechanism involing free redical have been proposed.All the experimental phenomena can be explained by the rate equation derived from the mechanism.The rate constants of the ratedeterming step have also been evaluated

关 键 词：二过碘酸合铜 乙二胺 动力学 分光光度法 氧化 

分 类 号：O623.731[理学—有机化学]