that 3 (R = H) solvolyses via a classical ion intermediate. The logarithms of the solvolysis rate constants of 3 showed linear correlations with those of 1-R-2-adamantyl tosylates (1) and 1-R-exo-2-norbornyl tosylates (2), indicating that the linear free-energy relationship between the β-substituent effects on the solvolysis rate is not a definite measure to distinguish between classical and non-classical
在80%的
乙醇水溶液中测定3-R-4-高
金刚烷基
甲磺酸盐(
甲磺酸盐)(3)的溶剂分解速率。25°C时相对一阶速率常数为1·0(R = H),2·29(R = Ph),3·26(R = p-茴香基),73·6(R = Me)和209(R = Et)。3的
甲醇分解反应产生了重排的
甲醚和重排的烯烃,以及少量(0·9–3·4%)的未重排产物。加速作用的阶数表明,尽管3(R = H)通过经典离子中间体溶剂化,但过渡态仍涉及大量的σ参与。溶剂分解速率常数3的对数与1-R-2-
金刚烷基甲
苯磺酸盐(1)和1-R- exo的对数显示线性相关-2-降
冰片烷基
甲苯磺酸酯(2),表明β取代基对溶剂分解速率的线性自由能关系不是区分经典和非经典中间体的明确方法。