By means of concentration and crystallization, an overall yield of more than 38 percent of pure trans isomer ( 93%) can be obtained from equilibrium products. 平衡产物经浓缩结晶,可获得以固体原料计38%以上的较纯(93%)反式异构体。
The paper, from the angle of conformational analysis, explains the experimental result of the reaction of pinacol rearrangements of cyclohexan_diol reasonably, which is caused by the cis and trans isomer of 1,2-dimethyl cyclohexan_diol. 本文从构象分析角度合理解释了1,2二甲基1,2环已二醇顺、反异构体发生Pinacol重排反应的实验结果。
In alkaline condition, the carboxyl group can coordinate with Os, and the coordinating species have trans and cis isomers, and the trans isomer can convert to cis with time; 在碱性条件下,羧基与探针的配位出现顺反两种异构体,随着时间的进行,反式会逐渐向顺式转变。
According to the coupling constant of the 1H NMR, it is show that the ligands are the trans isomer. 根据核磁图谱的耦合常数表明了配体是一个反式构象。