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

Crystal structures are reported for three amides containing N-benzo[d]thia-zole substituents. In N-(benzo[d]thia-zol-6-yl)-3-bromo-benzamide, C(14)H(9)BrN(2)OS, 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 R (3) (3)(19) rings, which are linked into sheets by short Br⋯Br inter-actions [3.5812†(6)†à ]. N-(6-Meth-oxy-benzo[d]thia-zol-2-yl)-2-nitro-benzamide, C(15)H(11)N(3)O(4)S, crystallizes with Z' = 2 in space group Pna2(1): 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-N-(6-meth-oxy-ben-zo[d]thia-zol-2-yl)-isoxazole-3-carboxamide, C(15)H(13)N(3)O(3)S, 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.