摘要
在２５～４０℃区间用分光光度法在碱性介质中研究了二（过碘酸根）合铜（Ⅲ）酸根配离子（ＤＰＣ）氧化二乙醇胺（ＤＥＡ）的反应动力学。结果表明，反应对ＤＰＣ为一级，对二乙醇胺是１．７～１．９级。准一级速率常数ｋｏｂｓ随［ＯＨ－］增大而增大，随［ＩＯ－４］ｅｘ（外加的ＩＯ－４离子浓度）的增加而减小，也随［ＫＮＯ３］增大而减小，有负盐效应。在氮气保护下，反应体系能引发丙烯腈聚合。提出了含有自由基过程的反应机理。经此导出的速率方程圆满地解释了全部实验事实。
\; The
kinetics of oxidation of diperiodatocuprate() complex ion was studied spectrophotometrically
between 25 and 40 in alkaline medium. The reaction rate showed first order dependance in
oxidant and 1.7￣1.9 order in diethanolamine. It was found that the pesudo first order ( )rate
constant, k\-\{obs\} increases with the increase of and decreases with the increase of \-\{ex.
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 ratedetermining step and corresponding the activation
parameters have also been obtained.\=\;
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
1999年第4期441-445,共5页
Chinese Journal of Inorganic Chemistry
关键词
二乙醇胺
还原
DPC
氧化剂
diperiodatocuprate()\ \ \ diethanolamine\ \ \
redox reaction\= kinetics and mechanism
