1-(6-Chloro-1,3-benzothiazol-2-yl)hydrazine

The asymmetric unit of the title compound, C 7H 6ClN 3S, consists of two crystallographically independent molecules (A and B). The dihedral angle between the benzothiazole ring system and the hydrazine group is 8.71 (6)° in molecule A and 7.16 (6)° in molecule B. The N - N - C - N and N - N - C - S torsion angles involving the hydrazine group are 170.89 (9) and -9.96 (13)°, respectively, in molecule A and 172.50 (9) and -7.43 (13)°, respectively, in molecule B. In the crystal, neighbouring molecules are connected via pairs of N - H⋯N hydrogen bonds, generating R 2 2(8) ring motifs, and are connected further by N - H⋯N hydrogen bonds into sheets lying parallel to the ab plane. The crystal studied was an inversion twin, the refined ratio of the twin components being 0.50 (3):0.50 (3).