Dynamic NMR as a Nondestructive Method for the Determination of Rates of Dissociation. X. Rates of Dissociation of the C–N Bond in Substituted 1-(1,3-Dithiolan-2-yl)pyridinium Perchlorates
作者:Toshiari Morita、Michinori Oki
DOI:10.1246/bcsj.59.3605
日期:1986.11
Rates of dissociation of the C–N bond in substituted 1-(1,3-dithiolan-2-yl)pyridinium ions in the perchlorate forms were obtained by the dynamic NMR technique in nitromethane-d3 and for one case in acetonitrile-d3. The study of the substituent effects on the rates of dissociation revealed that the rates were linearly correlated with the pKa values of the substituted pyridines. The mechanism of the dissociation
高氯酸盐形式的取代 1-(1,3-dithiolan-2-yl)pyridinium 离子中 C-N 键的解离速率是通过动态核磁共振技术在硝基甲烷-d3 和乙腈-d3 中的一种情况下获得的。取代基对解离速率影响的研究表明,解离速率与取代吡啶的 pKa 值呈线性相关。根据动力学数据,该解离机制被假定为 SN2 型,即高氯酸根离子充当亲核试剂。