3,3,3-Trifluoro-2-hydroxy-2-(trifluoromethyl)propionic acid

Abstract

In the title perfluorinated hydroxyisobutyric acid derivative, C4H2F6O3, the molecule shows approximately Cs symmetry. The carboxy group is nearly coplanar with the C—OH moiety and the O=C—C—O(H) torsion angle is 5.5 (2)°. An intramolecular O—H...O hydrogen bond occurs. In the crystal, O—H...O hydrogen bonds connect the molecules into supramolecular chains along the a-axis direction.