A new polymorph of 2,6-bis(trifluoromethyl)benzoic acid

Abstract

The asymmetric unit of a second polymorph of the title compound, C9H4F6O2, contains five independent molecules, which form hydrogen-bonded O—H...O dimers about inversion centers. The most significant structural difference between this structure and that of the first polymorph [Tobin & Masuda (2009). Acta Cryst. E65, o1217] is the hydrogen-bonded, dimeric orientation of the carboxylic acid functionalities.