constants (lg k2) correlated linearly with the electrophilicities E according to the linear free-energy relationship lg k2 = sN(N + E), allowing us to determine the nucleophilicity parameters N and sN for these anions. The nucleophilic reactivities of the carbanions vary from N = 27.5 for the parent compound to N = 20.0 for the 4-nitro-substituted derivative.
已在
DMSO 中研究了取代的芳基
乙酸乙酯与醌甲基化物和结构相关的
二乙基亚苄基丙二酸酯的反应动力学。根据线性自由能关系 lg k2 = sN(N + E),二阶速率常数 (lg k2) 与亲电性 E 线性相关,使我们能够确定这些阴离子的亲核性参数 N 和 sN。碳负离子的亲核反应性从母体化合物的 N = 27.5 到 4-硝基取代衍
生物的 N = 20.0。