Acta Cryst. (2009). E65, o2173  [ doi:10.1107/S1600536809032188 ]

5-Amino-1-phenyl-3-trifluoromethyl-1H-pyrazole-4-carboxylic acid

F. Caruso, M. V. Raimondi, G. Daidone, C. Pettinari and M. Rossi

Abstract: In the title compound, C₁₁H₈F₃N₃O₂, there are two molecules in the asymmetric unit wherein the phenyl rings make dihedral angles of 65.3 (2) and 85.6 (2)° with the pyrazole rings. In the crystal, pairs of molecules are held together by O-HO hydrogen bonds between the carboxyl groups, forming a centrosymmetric dimer with an R²₂(8) motif. Intramolecular N-HO interactions are also present.

Online 15 August 2009

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