4-{[(1E)-(3,5-Dichloro-2-hydroxyphenyl)methylene]amino}-1,5-dimethyl-2-phenyl-3H-pyrazol-3(2H)-one

Abstract

The crystal structure of the title compound, C18H15Cl2N3O2, shows a strong intra­molecular O—H⋯N hydrogen bond [N⋯O = 2.598 (3) Å, O—H = 0.81 (3) Å, H⋯N = 1.86 (3) Å and O—H⋯N = 152 (3)°], which leads to the existence of a phenol–imine tautomer.