Spectroscopic and X-ray Crystallographic Evidence for Electrostatic Effects in 4-Substituted Cyclohexanone-Derived Hydrazones, Imines, and Corresponding Salts
作者:David J. Dibble、Joseph W. Ziller、K. A. Woerpel
DOI:10.1021/jo200950s
日期:2011.10.7
of the molecule and the polarity of the solvent led to changes in the conformational preference of each molecule that were consistent with electrostatic stabilization of the axial conformer. 1H NMR spectroscopic analysis was utilized to determine the structure of cyclohexanone-derived substrates by comparison to conformationally restricted trans-decalone derivatives and computational models. X-ray
发现几种 4-取代的环己酮腙盐的轴向构象异构体在溶液中占主导地位。分子电荷和溶剂极性的变化导致每个分子的构象偏好发生变化,这与轴向构象异构体的静电稳定一致。1 H NMR 光谱分析用于通过与构象限制反式的比较来确定环己酮衍生底物的结构-decalone 衍生物和计算模型。X 射线晶体学证明侧链苄氧基的轴向构型是固态亚胺离子的优选构象。还确定中性腙的结构有利于固态苄氧基侧基的轴向构型。