1-Phenyl-5-[4-(trifluoromethyl)phenyl]pyrazolidin-3-one monohydrate

In the molecule of the title compound, C16H13F3N2O·H2O, the two benzene rings are oriented at a dihedral angle of 82.55 (3)° and the pyrazole ring adopts an envelope conformation. In the crystal structure, intermolecular C—H...F hydrogen bonds link the molecules into chains.