(5-Hydroxy-3-methyl-5-trifluoromethyl-4,5-dihydro-1H-pyrazol-1-yl)(2-hydroxyphenyl)methanone

Abstract

In the title compound, C12H11F3N2O3, the hydroxyphenyl ring is twisted by 35.42 (11)° from the plane of the pyrazoline ring. The keto O atom is involved in two intramolecular O—H...O hydrogen bonds, which generateS(6) loops. As result, a weak intramolecular C—H...N contact is formed, which generates anS(7) ring motif. In the crystal, pairs of O—H...O hydrogen bonds link molecules into inversion dimers with anR22(16) motif. The dimers are linked by parallel-slipped π–π interactions [intercentroid distance = 3.8438 (19) Å], forming columns along thec-axis direction.