Optical Activity and Chemical Structure in Tartaric Acid. X. Influence of Substituent and Solvent Effect
作者:Yojiro Tsuzuki
DOI:10.1246/bcsj.15.55
日期:1940.2
By comparing the molecular rotation of some bridged derivatives of tartaric acid, (Remark: Graphics omitted.) obtained by condensing aliphatic aldehydes with ethyl d-tartrate, it has been found that the laevo-rotation of the compounds diminishes with increasing bulk (parachor) of R, that is, R affects the positive partial rotation. It has been shown that the molecular rotation of these compounds is
通过比较通过脂肪醛与 d-酒石酸乙酯缩合获得的酒石酸的一些桥连衍生物的分子旋转,发现化合物的左旋旋转随着体积(parachor)的增加而减少的 R,即 R 影响正部分旋转。已经表明,这些化合物的分子旋转度大于通过酮与 d-酒石酸乙酯缩合获得的异构体(备注:图示省略。)。这种现象可以用基团 R1 和 R2 的邻位效应来解释。已经表明,按照对这些化合物旋转的影响的顺序排列的溶剂顺序是苯>醇>环己烷。并且它与折射率以及液体的缔合有关。