Different patterns of supra-molecular aggregation in three amides containing -(benzo[]thia-zol-yl) substituents.

Crystal structures are reported for three amides containing -benzo[]thia-zole substituents. In -(benzo[]thia-zol-6-yl)-3-bromo-benzamide, CHBrNOS, where the two ring systems are nearly parallel to one another [dihedral angle = 5.8 (2)°], the mol-ecules are linked by N-H⋯O and C-H⋯N hydrogen bonds to form ribbons of (19) rings, which are linked into sheets by short Br⋯Br inter-actions [3.5812 (6) Å]. -(6-Meth-oxy-benzo[]thia-zol-2-yl)-2-nitro-benzamide, CHNOS, crystallizes with ' = 2 in space group 2: the dihedral angles between the ring systems [46.43 (15) and 66.35 (13)°] are significantly different in the independent mol-ecules and a combination of two N-H⋯N and five C-H⋯O hydrogen bonds links the mol-ecules into a three-dimensional network. The mol-ecules of 5-cyclo-propyl--(6-meth-oxy-ben-zo[]thia-zol-2-yl)-isoxazole-3-carboxamide, CHNOS, exhibit two forms of disorder, in the meth-oxy group and in the cyclo-propyl-isoxazole unit; symmetry-related pairs of mol-ecules are linked into dimers by pairwise N-H⋯N hydrogen bonds. Comparisons are made with the structures of some related compounds.