Abstract
Infrared spectra were obtained for trifluorothiolacetic acid in the vapor, liquid, and solid states, and the Raman spectrum of the liquid was obtained. The spectra have been interpreted in terms of two rotational isomers being present in the liquid state, with the hydrogen atom being either eclipsed with or <i>trans</i> to the oxygen. The solid state spectrum was interpreted to be due to a hydrogen-bonded dimer. The absence of the hydrogen bonding in the liquid indicates a hydrogen bond energy of only a few hundred calories per mole. A vibrational assignment is proposed.
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