(Z)-7-[2-(4-Bromophenyl)hydrazin-1-yl-idene]-6-methyl-3-(pyridin-4-yl) -7H-1,2,4-triazolo[3,4-b][1,3,4]thiadiazine

Abstract

In the asymmetric unit of the title compound, C16H 12BrN7S, there are two crystallographically independent molecules with similar conformations. Both molecules are slightly twisted; the central 1,2,4-triazolo[3,4-b]-1,3,4-thiadiazine ring system makes dihedral angles of 9.65 (15) and 13.29 (15)°with the pyridine and benzene rings, respectively, in one molecule, whereas the corresponding values in the other molecule are 9.30 (15) and 4.84 (15)°. A weak intra-molecular C - H⋯N inter-action with an S(6) ring motif is observed in each molecule. In the crystal, the independent molecules are each linked through N - H⋯N hydrogen bonds and weak C - H⋯N interactions into ribbons along the c axis. The ribbons are further linked together by weak C - H⋯N, C - H⋯π and π-π [centroid-centroid distances = 3.572 (2)-3.884 (2) Å] inter-actions. © Fun et al. 2012.