N-(1,3-Benzothiazol-2-yl)acetamide

The title compound, C9H8N2OS, crystallizes with two molecules (A and B) in the asymmetric unit. The dihedral angles between the mean planes of the 1,3-benzothiazol-2-yl ring system and the acetamide group are 2.7 (4) (molecule A) and 7.2 (2) Å (molecule B). In the crystal, pairs of N—H⋯N hydrogen bonds link the A and B molecules into dimers, generating R 2 2(8) loops. The dimers stack along [100].

The title compound, C 9 H 8 N 2 OS, crystallizes with two molecules (A and B) in the asymmetric unit. The dihedral angles between the mean planes of the 1,3-benzothiazol-2-yl ring system and the acetamide group are 2.7 (4) (molecule A) and 7.2 (2) Å (molecule B). In the crystal, pairs of N-HÁ Á ÁN hydrogen bonds link the A and B molecules into dimers, generating R 2 2 (8) loops. The dimers stack along [100].

Related literature
For the related crystal structure of the acetamide derivatives, see: Jasinski et al. (2013);Fun et al. (2011aFun et al. ( ,b, 2012 Table 1 Hydrogen-bond geometry (Å , ). BN thanks the UGC for financial assistance through BSR one time grant for the purchase of chemicals and DST-PURSE for financial assistance. HSY thanks University of Mysore for research facilities. JPJ acknowledges the NSF-MRI program (grant No. CHE-1039027) for funds to purchase the X-ray diffractometer.

Experimental
2-Aminobenzothiazole (1 mmol) were dissolved in a 30 ml acetic acid and it was refluxed for 3 hrs (Fig.3). The reaction mixture was cooled and poured into ice cold water. The precipitate obtained was obtained by filtration and recrystallized in ethanol. Colorless blocks were grown from methanol solution by the slow evaporation method and was used as such for X-ray studies (M.P.: 453-455 K).

Refinement
All of the H atoms were placed in their calculated positions and then refined using the riding model with Atom-H lengths of 0.93Å (CH), 0.96Å (CH 3 ) or 0.86Å (NH). Isotropic displacement parameters for these atoms were set to 1.2 (CH, NH) or 1.5 (CH 3 ) times U eq of the parent atom. Idealised methyl were refined as rotating groups.    Synthesis scheme for (I).

N-(1,3-Benzothiazol-2-yl)acetamide
Crystal data Special details Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes.