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

In the title perfluorinated hy­droxy­isobutyric acid derivative, C₄H₂F₆O₃, the mol­ecule shows approximately C_s 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.

rac-3,3,3-Trifluoro­lactic acid

The title compound (systematic name: rac-3,3,3-trifluoro-2-hy­droxy­propanoic acid), C₃H₃F₃O₃, is a fluorinated derivative of lactic acid. The O=C—C—O(H) torsion angle is 13.26 (15)°. In the crystal, O—H...O hydrogen bonds and C—H...O contacts connect the mol­ecules into sheets perpendicular to the c axis.