Low‐temperature 13C NMR spectral data have been obtained for equatorial and axial methyl‐, ethyl‐ and isopropylcyclohexane using a high‐temperature cryogenic trapping technique. 13C chemical shift differences between major and minor conformations of each compound are discussed in terms of chemical shift theories. A convenient synthesis of deuteriated dichlorofluoro‐ and difluorochloromethane, which
使用高温低温捕集技术获得了赤道和轴向甲基、乙基和
异丙基环己烷的低温 13C NMR 光谱数据。根据
化学位移理论讨论了每种化合物的主要和次要构象之间的 13C
化学位移差异。还介绍了
氘代
二氯氟甲烷和二
氟氯甲烷的便捷合成方法,它们是优良的低温 NMR 溶剂。