The Steric Requirements and the Nature of the Intramolecular Hydrogen Bonding of<i>o</i>-Methoxybenzoic Acid
作者:Michinori \={O}ki、Minoru Hirota
DOI:10.1246/bcsj.37.213
日期:1964.2
The infrared and ultraviolet absorption spectra of derivatives of salicylic acid with alkyl sub-stituents at the 2-O-, 3- and/or 6-positions have been measured, and much information on the nature of the intramolecular hydrogen bonding has been obtained from these data. The infrared O-H stretching absorption measurement shows that a substituent at the 6-position inhibits the formation of hydrogen bonding
已经测量了在 2-O-、3-和/或 6-位具有烷基取代基的水杨酸衍生物的红外和紫外吸收光谱,并且已经获得了许多关于分子内氢键性质的信息。这些数据。红外 OH 伸缩吸收测量表明,6 位取代基抑制了氢键的形成,3 位取代基具有一些不利的空间效应。这些数据暗示了羧基与苯核共面的重要性;此外,考虑这些数据,连同红外 C=O 拉伸和紫外光谱数据,得出的结论是,氢键反式异构体 Ia 的结构可能表示为 XXIV、XXV、XXVI 和二十七、