Effect of solvent and temperature upon the rotationally averaged vicinal coupling constants of some substituted 1,2-dibromoethanes
作者:W. F. Reynolds、D. J. Wood
DOI:10.1139/v69-215
日期:1969.4.15
The solvent dependence of vicinal coupling constants has been investigated for (1,2-dibromoethyl)-benzene and three of its 4-substituted derivatives and for threo- and erythro(1,2-dibromopropyl)benzene. The temperature dependence of the vicinal coupling constants of three of the compounds has also been investigated. The difference between the two vicinal coupling constants of (1,2-dibromoethyl)benzene
已经研究了 (1,2-二溴乙基)-苯及其三个 4-取代衍生物以及苏式和赤型 (1,2-二溴丙基) 苯的邻位耦合常数的溶剂依赖性。还研究了三种化合物的邻位偶联常数的温度依赖性。(1,2-二溴乙基)苯的两个邻位耦合常数之间的差异取决于溶液介电常数(在非芳族溶剂中),而耦合常数的总和保持不变。其三个旋转异构体的相对稳定性是从这些信息中推导出来的。4 位的极性取代基不会以任何可预测的方式影响旋转平衡。苏式(1,2-二溴丙基)苯的邻位偶联常数强烈依赖于溶剂。其三个旋转异构体的相对稳定性是从邻位耦合常数与温度无关的观察中推导出来的。赤(1,2-二溴丙基)-苯的最稳定的旋转异构体...