Structure Reports Online

Volume 66, Part 8 (August 2010)

organic compounds

si2272 scheme

Acta Cryst. (2010). E66, o2107 [ doi:10.1107/S1600536810024402 ]

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

A. Q. Ather, M. N. Tahir, M. A. Khan and M. M. Athar

Abstract: Two independent molecules are present in the asymmetric unit of the title compound, C₁₂H₁₁ClN₄, (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 R₂²(8) ring motifs through intermolecular N-HN hydrogen bonds. The crystal structure is stabilized by [pi] - [pi] 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.