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化学学报
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化学学报 ›› 1988, Vol. 46 ›› Issue (3): 207-211.    下一篇

研究论文

碱性介质中二过碘酸合铜(III)配离子氧化四氢糠醇的动力学及机理

王安周;石铁生   

  1. 河北大学化学系
  • 发布日期:1988-03-15

Kinetics and mechanism of oxidation of tetrahydrofurfuryl alcohol by diperiodatocuprate (III) in alkaline medium

WANG ANZHOU;SHI TIESHENG   

  • Published:1988-03-15

PDF

549

被引次数

20

本文采用分光光度法研究了二过碘酸合铜(III)配离子在碱性介质中氧化四氢糠醇的动力学及机理. 结果表明反应对[Cu(III)]是一级, 对四氢糠醇是1.3级. 反应速率随体系中[OH^-]的增大而增大, 随过碘酸浓度的增大而减小, 反应体系加入硝酸钾盐时,速率增大, 有正盐效应. 在氮气保护下, 体系能够诱发丙烯酰胺聚合. 提出了一种含有自由基过程的反应机理, 据此导出了一个能够解释本文全部实验事实的速率方程. 求得了速率控制步骤的速率常数, 并给出了相应的活化参数.

关键词: 分光光度法, 反应机理, 反应动力学, 铜络合物, 动力学方程, 碘酸, 活化能, 反应速度, 四氢呋喃 P, 呋喃甲醇 P

The kinetics of oxidation of tetrahydrofurfuryl alcohol by potassium diperiodatocuprate (III) has been studied spectrophotometrically in alkaline medium. The order in [Cu(III)] is found to be unity and that in alcohol to be 1.3. The rate increases with increasing in [OH-] and decreases with increasing in [KIO4]. There is a pos. salt effect of addition of KNO3. Under the protection of nitrogen gas, the reaction system can induce polymerisation of acrylamide. A plausible mechanism involving free radicals has been proposed. The activation parameters of the rate determing step have been calculated

Key words: SPECTROPHOTOMETRY, REACTION MECHANISM, REACTION KINETICS, COPPER COMPLEX, KINETICS EQUATIONS, IODIC ACID, ACTIVATION ENERGY, REACTION RATE, TETRAHYDROFURAN P, FURANMETHANOL P

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