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Vibrational spectra,normal coordinate analyses,and molecular configurations of crystalline propionic acid
Authors:J. Umemura
Affiliation:The Institute for Chemical Research, Kyoto University, Uji, Kyoto, 611 Japan
Abstract:
Temperature dependence of the IR spectra of crystalline propionic acid were examined in the temperature range 242–50 K. The intensities of most absorption bands increased on lowering the temperature, but some bands diminished until they disappeared at temperatures lower than about 120 K. Normal coordinate analyses indicate that the former bands are due to the stable cis dimer and the latter due to the less stable trans dimer which would be produced from the cis dimer by simultaneous proton transfer along two hydrogen bonds.
Keywords:Adresse actuelle: Groupe de dynamique des Phases Condensées   Universitédes Sciences et Techniques du Languedoc   Montpellier   France.
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