4-[(3-Hydroxyanilino)-(phenyl)methylidene]-3-methyl-1-phenyl-1H-pyrazol- 5(4H)-one

Abstract

In the title compound, C23H19N3O 2, the dihedral angles formed by the pyrazolone ring with the three benzene rings are 30.91 (6), 60.96 (4) and 57.01 (4)°. The ligand is in the enamine-keto form and its structure is stabilized by an intramolecular N - H⋯O hydrogen bond. In the crystal, O - H⋯N hydrogen bonds link molecules into chains parallel to [011̄].