Reactions of aryl acetates with secondary alicyclic amines in ethanol/water mixtures: Effect of the solvent composition on the kinetics and mechanism
作者:Enrique A. Castro、Daniela Millan、Raul Aguayo、Paola R. Campodónico、José G. Santos
DOI:10.1002/kin.20598
日期:2011.12
We report a kinetic study on the reactions of secondary alicyclic amines toward 4‐nitrophenyl, 2,4‐dinitrophenyl, and 2,4,6‐trinitrophenyl acetates (1, 2, and 3) in ethanol/water mixtures of different compositions. It is found that (i) the intermediate in the reaction of 1 is stabilized in a mixture of 90 vol% ethanol; (ii) for the reaction of 2, the mechanism is stepwise in water but concerted in
我们报告了在不同组成的乙醇/水混合物中仲脂环族胺对4-硝基苯基,2,4-二硝基苯基和2,4,6-三硝基苯基乙酸酯(1、2和3)的反应的动力学研究。发现(i)在1的反应中的中间体在90体积%的乙醇的混合物中稳定;(ii)对于2的反应,其机理是在水中逐步进行的,但在混合物中是一致的;(iii)对于3的反应,该机理在整个组成范围内是一致的;(ⅳ)的效果 NO 2胜过溶剂作用;(v)可以排除反应核心中的优先溶剂化。©2011 Wiley Periodicals,Inc.国际化学杂志Kinet 43:687–693,2011