化学学报 ›› 1989, Vol. 47 ›› Issue (4): 411-416. 上一篇    

研究论文

氮氧自由基研究 XX: 哌啶氧铵溴化物与半胱氨酸于酸性水溶液中的反应和机理

刘有成;张发   

  1. 兰州大学化学系
  • 发布日期:1989-04-15

Studies on nitroxides XX: A mechanistic study on reaction between 2,2,6,6-tetramethyl-4-hydroxypiperidine oxoammonium bromide and cysteine in acidic aqueous medium

LIU YOUCHENG;ZHANG FA   

  • Published:1989-04-15

本文从反应产物, 化学反应计量关系, 电化学模拟和动力学测定诸方面对氧铵盐与dl-半胱氨酸在盐酸水溶液中的反应作了研究.

关键词: 铵化合物, 哌啶 P, 水溶液, 氧, 反应机理, 氮, 溴化物, 游离基, 氧化合物, 半胱氨酸

The products of the title reaction of I in aqueous HCl were the corresponding hydroxylamine and cysteic acid. The stoichiometry of the reaction, determine by the TLC scan method, was 3:1. According to a cyclic voltammetric study, a one-electron-transfer process is involved in the reaction. Stop-flow UV kinetic experiments showed that the reaction was first order in both reactants; the reaction rate decreased with increasing acidity of the medium.

Key words: AMMONIUM COMPOUND, PIPERIDINE P, AQUEOUS SOLUTION, OXYGEN, REACTION MECHANISM, NITROGEN, BROMIDE, FREE RADICAL, OXYGEN COMPOUNDS, CYSTEINE

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