Gas-phase stability of tertiary carbenium ions and rates of solvolysis of tertiary derivatives
作者:Paul M�ller、Jean-Claude Rossier、Jose-Luis M. Abboud
DOI:10.1002/1099-1395(200010)13:10<569::aid-poc274>3.0.co;2-h
日期:2000.10
The stability of tertiary carbenium ions was determined in the gas phase by ion cyclotron resonance (ICR) and by dissociative proton attachment (DPA). The rate constants for solvolysis of bridgehead derivatives correlate well with the stabilities of bridgehead carbenium ions, as determined by DPA and by ICR, but the ICR data of strained ions do not correlate, indicating rearrangements under the conditions
通过离子回旋共振 (ICR) 和解离质子附着 (DPA) 在气相中确定叔碳鎓离子的稳定性。桥头衍生物溶剂分解的速率常数与桥头碳鎓离子的稳定性密切相关,如 DPA 和 ICR 所确定的,但应变离子的 ICR 数据不相关,表明 ICR 实验条件下的重排。简单的无环叔衍生物的溶剂分解速度比基于各自碳鎓离子稳定性的预测要快。使用 (R)-3-chloro-3,7-dimethyloctane (17) 研究了亲核溶剂参与对叔衍生物甲醇分解速率的影响,该反应与 77% 的反转和 23% 的外消旋反应。版权所有 © 2000 John Wiley & Sons, Ltd.