高等学校化学学报

高等学校化学学报 ›› 1990, Vol. 11 ›› Issue (9): 988.

• 研究论文 • 上一篇    下一篇

取代苯甲腈类有机污染物水解行为的研究

王连生1, 余刚1, 韩朔睽1, 王爱国1, 张正2   

  1. 1. 南京大学环境科学系;
    2. 南京大学化学系
  • 收稿日期:1988-11-28 出版日期:1990-09-24 发布日期:1990-09-24
  • 通讯作者: 王连生, 210008

Investigation of Hydrolysis of Disubstituted Benzonitriles in Aqueous Mediums

Wang Liansheng1, Yu Gang1, Han Shuokui1, Wang Aiguo1, Zhang Zheng2   

  1. 1. Department of Environemnt Science, Nanjing University,, Nanjing;
    2. Department of Chemistry, Nanjing University, Nanjing
  • Received:1988-11-28 Online:1990-09-24 Published:1990-09-24

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被引次数

5

摘要： 研究了10种二取代苯甲腈类有机污染物的水解行为,用反相高效液相色谱测定了不同pH值和不同溫度下的水解速度常数。结果表明,含羟基的化合物在酸,碱和中性水介质中均不易水解;其它化合物仅在碱性介质中水解,其碱性催化水解速度常数与Hammett取代基常数以及酸常数之间呈近似线性关系。相关方程为:lgkB=1.45σ-0.859和lgkB=-1.34pKa-4.83。

关键词: 皋甲腈, 水解, 高效液相色谱, Hammett取代基常数, 回归方程

Abstract: Aseries of hydrolysis rate constants and activation energy of 6 disubstituted benzonitriles were determined at pH 10～14 and 40～80℃ by HPLC. The fate constants of these compounds at 25℃ were obtained by extrapolating. There is a linear relationship between lgkB(kB defined as hydroly-Sis rate constant for base-catalysis) and σ (Hammett Yett substituent constant) in the form of lgkB=1. 45σ-0.859. Also, the relationship between lg kB and pKa(acid constant) was obtained in the form of lgkB=1. 34pKa-4.83.The resurts obtained are significant and useful to predicting the effects of all disubstituted behzoni-triles on the environrnent and can offer some scientific data for the risk-assessment and treatment of these organic pollutants.

Key words: Benzonitrile, Hydrolysis-, HPLC, Hammett Substituent constant, Regression equation

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