INFRA-RED STUDIES OF PLANAR INTRA-MOLECULAR HYDROGEN BONDS
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Date
1971
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Ohio State University
Abstract
The infra-red spectra of a series of molecules containing carbonyl and hydroxyl groups (e.g. $CH_{3}COCH_{2}OH$) were measured in the vapor phase between $4000 cm^{-1}$ and $300 cm^{-1}$ The main results are that only one band is observed for each of the OH and $C= O$ stretching modes, their frequencies being close to those of carboxylic acid monomers ($3570 cm^{-1}$, and $1760 cm^{-1}$), while the OH torsional mode is found at a much lower frequency ($375 cm^{-1}$) Pyruvic acid ($CH^{2}COCOOH$) appears to be somewhat unusual in that the $V_{8} (OH)$ band of one of the two monomeric conformations is observed at $3460 cm^{-1}$. These results are interpreted in terms of planar intra-molecular hydrogen bonds and compared with other types of intra-molecular hydrogen bonds such as in the 2-substituted ethanols.
Description
Author Institution: Centre de Recherches sur les Atomes et les Mol\'{e}cules, Universit\'{e} Laval