2-Propyl-4H-thia-zolo[3,2-a][1,3,5]triazine-4-thione.

In the title compound, C(8)H(9)N(3)S(2), the n-propyl chain is disordered over two orientations (site-occupancy ratio = 0.522:0.478) and is roughly perpendicular to the fused thia-zolotriazine system. The angle between the fused ring and the propyl chain is 83.6 (1)° [ 82.2 (1)° for the disordered chain]. The structure is stabilized by C-H⋯N hydrogen bonds.

Ethyl 4-(3-butyrylthio-ureido)benzoate.

The title compound, C(14)H(18)N(2)O(3)S, crystallizes in the thio-amide form with an intra-molecular N-H⋯O hydrogen bond associated with the thio-urea unit. With the benzoic acid and the butyrylthio-ureido units, the mol-ecule consists of two planar building blocks connected by the common NH function adjacent to the aromatic ring. The inter-planar angle is 33.38 (3)°. Mol-ecules are connected in chains parallel to [110] by classical hydrogen bonds of the N-H⋯O type from the other NH group to the benzoate C=O of a neighboring mol-ecule.

N-(Thia-zol-2-yl)acetamide.

The title compound, C(5)H(6)N(2)OS, was synthesized from acetyl chloride and 2-amino-thia-zole in dry acetone. The asymmetric unit contains two mol-ecules. The crystal structure is stabilized by N-H⋯N and C-H⋯O hydrogen bonds.

1-(1,3-Benzothia-zol-2-yl)-3-benzoyl-thio-urea.

The title compound, C(15)H(11)N(3)OS(2), was synthesized from benzoyl thio-cyanate and 2-amino-benzothia-zole in dry acetone. The thio-urea group is in the thio-amide form. The mol-ecules are stabilized by two inter-molecular C-H⋯S and C-H⋯O hydrogen bonds. Intra-molecular N-H⋯O hydrogen bonding results in a pseudo-S(6) planar ring with dihedral angles of 11.23 and 11.91° with the benzothiazole ring system and the phenyl ring, respectively.