ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE, cilt.67, 2011 (SCI-Expanded)
There are two independent molecules (A and B) with similar conformations in the asymmetric unit of the title compound, C9H8ClN5S. The benzothiadiazole ring systems of both molecules are essentially planar [maximum deviation = 0.021 (2) A in molecule A and 0.022 (1) A in molecule B] and make dihedral angles of 68.78 (9) and 54.39 (8)degrees, respectively, with the mean planes of their 4,5-dihydro-1H-imidazole rings. An intramolecular N-H...Cl hydrogen bond occurs in molecule B. In the crystal, both molecules form centrosymmetric dimers through pi-stacking of their benzothiadiazole rings, with interplanar distances of 3.3174 (7) and 3.2943 (6) A. These dimers are further linked via pairs of N-H...N hydrogen bonds with the dihydroimidazole rings as the hydrogen-bonding donors and one of the benzothiadiazole N atoms as the acceptors, generating R (2) 2(16) ring motifs. The A (2) and B (2) dimers in turn form additional N-H...N hydrogen bonds with the secondary amine as the H-atom donor and the dihydroimidazole N atom as the acceptor. These R (2) 2(8)-type interactions connect the A (2) and B (2) dimers with each other, forming infinite chains along [1