Kinetic evaluation of the solvolysis of isobutyl chloro- and chlorothioformate esters
作者:Malcolm J D’Souza、Matthew J McAneny、Dennis N Kevill、Jin Burm Kyong、Song Hee Choi
DOI:10.3762/bjoc.7.62
日期:——
The specific rates of solvolysis of isobutyl chloroformate (1) are reported at 40.0 degrees C and those for isobutyl chlorothioformate (2) are reported at 25.0 degrees C, in a variety of pure and binary aqueous organic mixtures with wide ranging nucleophilicity and ionizing power. For 1, we also report the first-order rate constants determined at different temperatures in pure ethanol (EtOH), methanol
氯甲酸异丁酯 (1) 的具体溶剂解速率在 40.0 摄氏度时报告,氯硫甲酸异丁酯 (2) 的具体溶剂解速率在 25.0 摄氏度时报告,在各种具有广泛亲核性和电离能力的纯和二元水性有机混合物中。对于 1,我们还报告了在不同温度下在纯乙醇 (EtOH)、甲醇 (MeOH)、80% EtOH 以及 97% 和 70% 2,2,2-三氟乙醇 (TFE) 中测定的一级速率常数. 报告了从这五种溶剂中 1 的 Arrhenius 图中获得的活化值的焓(DeltaH(不相等))和熵(DeltaS(不相等))。使用扩展的 Grunwald-Winstein 方程分析特定的溶剂分解速率。