Correlation of the Rates of Solvolysis of the Benzhydryldimethylsulfonium Ion. Application of the Aromatic Ring Parameter<sup>1</sup>
作者:Dennis N. Kevill、Steven W. Anderson、Norsaadah HJ Ismail
DOI:10.1021/jo960909t
日期:1996.1.1
the specific rates of solvolysis of the benzhydryldimethylsulfonium ion in 34 solvents have been analyzed using various forms of the extended Grunwald-Winstein equation. The specific rates are insensitive toward changes in solvent nucleophilicity (N(T)) values, and they correlate best against a combination of Y(+) values (based on the solvolyses of the 1-adamantyldimethylsulfonium ion) and aromatic
The LFER equation log k = sf(Ef + Nf) was used to derive the nucleofuge specific parameters (Nf and sf) for dimethyl sulfide in the series of aqueous alcohols, using the SN1 solvolysis rate constants obtained for X-substituted benzhydryl dimethyl sulfonates 1−5. The slope parameters (sf) are practically independent of the solvent used, while Nf parameters slightly decrease as the polarity of the solvent
使用LFER方程log k = s f(E f + N f)来推导针对以下醇系列的S N 1溶剂分解速率常数,以得出一系列含水醇中二甲硫的核反应堆特定参数(N f和s f)。 X-取代的二苯甲基二甲磺酸盐1 - 5。斜率参数(s f)实际上与所用溶剂无关,而N f参数随着溶剂极性的增加而略有降低。