Acta Cryst. (2003). E59, o665-o666  [ doi:10.1107/S1600536803007700 ]

4,4,4-Trifluoro-trans-2-butenoic acid

A. T. Hulme and D. J. Watkin

Abstract: The title compound, C₄H₃O₂F₃, crystallizes with two molecules in the asymmetric unit. These two molecules form a dimer via a pair of hydrogen-bonding interactions between the carboxylic acid groups of the two molecules. The correspondences of HO distances and O-HO angles are 1.77  (3)  Å and 179  (3)°, and 1.59  (4)  Å and 175  (4)°. The uncertainty in their position indicates disorder in the carboxylic acid H atoms.

Online 23 April 2003

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