2-Amino-3,4,5,6-tetrafluorobenzoic acid

Abstract

The asymmetric unit of the title compound, C7H3F4NO2, obtained as an intermediate in the synthesis of a coupling reagent, contains four independent and conformationally similar molecules. The amine H atoms form both intramolecular and intermolecular N—H...Ocarboxyl hydrogen bonds which, together with intermolecular O—H...Ocarboxyl hydrogen bonds and N—H...F associations form ribbon structures along the a axis.