Crystal structure and Hirshfeld surface analysis of 4-(2,6-di­chloro­benz­yl)-6-phenyl­pyridazin-3(2H)-one

The asymmetric unit of the title compound, C(17)H(12)Cl(2)N(2)O, contains one independent mol­ecule. The mol­ecule is not planar, the phenyl and pyridazine rings are twisted with respect to each other, making a dihedral angle of 29.96 (2)° and the di­chloro­phenyl ring is nearly perpendicular to the pyridazine ring, with a dihedral angle of 82.38 (11)°. In the crystal, pairs of N—H⋯O hydrogen bonds link the mol­ecules to form inversion dimers with an R (2) (2)(8) ring motif. The dimers are linked by C—H⋯O inter­actions, forming layers parallel to the bc plane. The inter­molecular inter­actions were investigated using Hirshfeld surface analysis and two-dimensional fingerprint plots, and the mol­ecular electrostatic potential surface was also analysed. The Hirshfeld surface analysis of the title compound suggests that the most significant contributions to the crystal packing are by H⋯H (31.4%), Cl⋯H/H⋯Cl (19.9%) and C⋯H/H⋯C (19%) contacts.