Molecular conformers in gas-phase ethanol: A temperature study of vibrational overtones |
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Authors: | Howard L Fang Robert L Swofford |
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Institution: | The Standard Oil Company (Ohio), Corporate Research Center, 4440 Warrensville Center Road, Warrensville Heights, Ohio 44128, USA |
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Abstract: | Overtone absorption spectra are reported for ethanol vapor (10150–19900 cm?1) measured by intracavity photoacoustic spectroscopy. The OH overtones are composed of two sub-bands which are assigned as the transitions of two conformers of the OH bond in the trans or gauche position with respect to the methyl group. From the temperature dependence of the OH overtone intensity we determine the enthalpy difference between the conformers to be 0.7 ± 0.1 kcal/mole. |
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