ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS, ss.1173-1182, 2020 (ESCI)
In the title compound, C13H9Cl2N3O2, the 2,6-dichlorophenyl ring and the nitrosubstituted benzene ring form a dihedral angle of 21.16 (14)degrees. In the crystal, face-to-face pi-pi stacking interactions occur along the a-axis direction between the centroids of the 2,6-dichlorophenyl ring and the nitro-substituted benzene ring. Furthermore, these molecules show intramolecular N-H center dot center dot center dot Cl and C-H center dot center dot center dot O contacts and are linked by intermolecular N-H center dot center dot center dot O and C-H center dot center dot center dot Cl hydrogen bonds, forming pairs of hydrogen-bonded molecular layers parallel to (20 (2) over bar). The Hirshfeld surface analysis of the crystal structure indicates that the most important contributions to the crystal packing are from H center dot center dot center dot H (23.0%), O center dot center dot center dot H/H center dot center dot center dot O (20.1%), Cl center dot center dot center dot H/H center dot center dot center dot Cl (19.0%), C center dot center dot center dot C (11.2%) and H center dot center dot center dot C/C center dot center dot center dot H (8.0%) interactions.