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.

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.

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.

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.