Raman Spectroscopic Evidence for Cooperative C−H···O Interactions in the Acetaldehyde−CO2 Complex
- 19 November 2002
- journal article
- research article
- Published by American Chemical Society (ACS) in Journal of the American Chemical Society
- Vol. 124 (50) , 14818-14819
- https://doi.org/10.1021/ja027337g
Abstract
In carbonyl compounds having a hydrogen atom attached to the α-carbon or directly to the carbonyl carbon, our recent ab initio and solvation studies have predicted the presence of a weak C−H···O interaction with CO2. This intermolecular interaction acts cooperatively with the Lewis acid−Lewis base interaction that exists between CO2 and the carbonyl group. This communication provides the first experimental evidence for this cooperative interaction in the acetaldehyde−CO2 complex using Raman spectroscopy at 25.0 °C in the gas phase. The implications of these interactions in the solvation of carbonyl-based CO2-philes are also discussed.Keywords
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