Nucleophile Effects for the Reactions of Nucleophilic Substitution by Pressure and Temperature

Journal of the Korean Chemical Society

Sung-Yong Choi¹  Se-Kyong Kim¹  Young-Shin Ko¹ 

关键词: Nucleophile;    Kinetics;    High Pressure;    High Vacuum;    Substituent Effect;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

Kinetics for the nucleophiles have been studied under high vacuum and high pressures in various temperatures. Pseudo-first order rate constants, second order rate constants, thermodynamic parameters and Hammett r-values are determined. The values of DV¢Ô, Db¢Ôand DS¢Ôare all negative. The Hammett r-values are negative for the nucleophile (rX) over the pressure range studied. The results of kinetic studies for pressure and nucleophilet show that these reactions proceed in typical SN2 reaction mechanism and change of mechanism.

【 授权许可】

Unknown