The title compound, C 14 H 11 NS, crystallizes with Z 0 = 0.75 in the space group C2/m. Two independent molecules are present, one of which lies with all the non-H atoms on a mirror plane, while the other is fourfold disordered across a site of 2/m symmetry. The ordered molecules are stacked such that they enclose continuous channels running along twofold rotation axes, and the disordered molecules are positioned within these channels.
CommentWe report here the structure of the title compound, (I) (Fig. 1). Although related pairs of compounds containing, respectively, Me and Cl substituents, such as (I) and (II), are not infrequently isomorphous, the crystal structure of (I) shows some significant differences from the pair of analogues (II) (Cobo et al., 2005) and (III) (Cobo, Quiroga et al., 2006), which are isomorphous and isostructural with one another.While the isomorphous pair of compounds (II) and (III) both crystallize with Z 0 = 1 in the common space group P2 1 /n, compound (I) crystallizes in the rather uncommon space group C2/m with Z 0 = 0.75. There are two independent molecules of (I) in the unit cell. For molecule 1 containing atom S1 (Fig. 1a), all of the non-H atoms lie on a mirror plane, selected The independent molecular components of (I), with the atom-labelling schemes, showing (a) molecule 1, (b) a single orientation of molecule 2, and (c) the four orientations of molecule 2 across a site of 2/m symmetry at (0, 0, 1 2 ), where the symmetry positions denoted by the suffixes B, C and E are (Àx, y, Àz + 1), (Àx, Ày, Àz + 1) and (x, Ày, z), respectively. In (c), the orientation of the molecule at (x, y, z) and the viewpoint are the same as in (b). Displacement ellipsoids are drawn at the 30% probability level.
