Kinetics of the Solvolyses of Fluoro-Substituted Benzhydryl Derivatives: Reference Electrofuges for the Development of a Comprehensive Nucleofugality Scale
作者:Christoph Nolte、Herbert Mayr
DOI:10.1002/ejoc.200901400
日期:2010.3
A series of m-fluoro-substituted benzhydryl chlorides, bromides, mesylates, and tosylates 1-X to 5-X were prepared and subjected to solvolysis reactions in various solvents. The observed first-order rate constants k s (25 °C) were found to follow the correlation equation log k s (25 °C) = s f (N f + E f ), which allowed us to determine the electrofugality parameters E f for these destabilized benzhydrylium
制备了一系列间氟取代的二苯甲基氯化物、溴化物、甲磺酸盐和甲苯磺酸盐 1-X 至 5-X,并在各种溶剂中进行溶剂分解反应。发现观察到的一阶速率常数 ks (25 °C) 遵循相关方程 log ks (25 °C) = sf (N f + E f ),这使我们能够确定这些不稳定的电离参数 E f二苯甲基阳离子和一系列离去基团/溶剂组合的离核参数 N f , sf 。