The Infrared Spectra of Dichloroacetic Acid Derivatives: Characteristic Absorption Frequencies of the -CHCl2 Group

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The infrared spectra of seven compounds containing the -CHCl2 group attached to various carbonyl functionalities have been carefully recorded under a variety of conditions. Group frequency ranges for the CH, CC, and CCl (two) stretching modes and two CH bending modes have been developed. With the exception of the CC stretching mode, these vibrations fall in rather narrow regions of the spectrum. The conformational equilibria present in chlorine-substituted acetic acid derivatives are reflected by their infrared spectra in various ways. The situation with regard to the observed carbonyl stretching frequencies as related to conformational equilibria is reviewed.

Keywords: Conformational analysis; Dichloroacetic acid derivatives; Infrared group frequencies; Infrared spectra

Document Type: Research Article


Affiliations: 1: Department of Chemistry, Miami University, Oxford, Ohio 45056 2: Department of Chemistry, Wright State University, Dayton, Ohio 45435

Publication date: January 1, 1986

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