Sulfur Inversion in and Molecular Structure of<i>meso</i>-3,4-Diethyl-3,4-dimethyl-1-phenyl thiolanium Tetrafluoroborate
作者:Michinori Oki、Yasuhisa Yamada、Shigeru Murata
DOI:10.1246/bcsj.61.707
日期:1988.3
Kinetics of sulfur inversion in the title compound was studied by the classical method to afford the following kinetic parameters for the process (1r,3R,4S)→(1s,3R,4S): ΔH\eweq 25.7±0.3 kcal mol−1, ΔS\eweq −2.2±0.8 cal mol−1 K−1. X-Ray crystallography of one isomer (1r,3R,4S) in which the methyl groups are cis to the phenyl group shows some abnormal bond lengths and conformations due to the steric congestion
通过经典方法研究标题化合物中硫转化的动力学,以提供以下过程的动力学参数(1r,3R,4S)→(1s,3R,4S):ΔH\eweq 25.7±0.3 kcal mol-1, ΔS\eweq -2.2±0.8 cal mol-1 K-1。一种异构体 (1r,3R,4S) 的 X 射线晶体学显示出一些异常的键长和构象,这是由于硫烷环的 3,4-区域的空间拥挤造成的。通过将结构与密切相关的结构进行比较,指出结构中的异常,并讨论了它们与势垒高度反演的相关性。