论文部分内容阅读
将在水 乙醇混合溶剂中从卤代苯甲酸到苯甲酸的质子迁移过程与在气相中的同一过程进行了比较 .用一个热力学循环计算了在从气相初始状态到混合溶剂某一组成X时该质子迁移过程的热力学函数的变化 ,即δΔPig→X.这一项的值被作为质子迁移过程中卤代苯甲酸分子 ,离子和溶剂间的相互作用的外部贡献的一种量度 .但是 ,对于邻位卤代苯甲酸 ,由于位阻效应的存在 ,δΔPig→X值不能作为外部贡献的量度 .
The process of proton transfer from halobenzoic acid to benzoic acid in water-ethanol mixed solvent was compared with the same process in the gas phase.A thermodynamic cycle was used to calculate the proton transfer from halogenated benzoic acid to benzoic acid The change in the thermodynamic function of the proton transfer process, δΔPig → X. The value of this term is used as a measure of the external contribution of the interaction between halogenated benzoic acid molecules, ions and solvents during proton transport. However, Bromobenzoic acid, δΔPig → X value can not be used as a measure of external contribution due to the steric effect.