3-Chloro-6-[(E)-2-(1-phenyl­ethyl­idene)hydrazin­yl]pyridazine

Two independent mol­ecules are present in the asymmetric unit of the title compound, C(12)H(11)ClN(4), (Z′ = 2): the dihedral angles between the phenyl and pyridizine rings are 8.35 (10) and 37.64 (6)°. In the crystal, the two mol­ecules form inversion dimers with R (2) (2)(8) ring motifs through inter­molecular N—H⋯N hydrogen bonds. The crystal structure is stabilized by π–π inter­actions between the pyridazine rings of symmetry-related molecules. In one of the independent mol­ecules, the centroid–centroid separations are 3.6927 (13) and 3.7961 (13) Å, whereas in the other, the separations are 3.6909 (13) and 3.9059 (13) Å.