organic compounds
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In the title molecule, C16H11BrN2OS, the central imidazo[2,1-b][1,3]benzothiazole tricycle is essentially planar (r.m.s. deviation = 0.021 Å). The terminal phenyl ring is twisted at 36.18 (5)° from the mean plane of the tricycle. In the crystal, pairs of eak C—HO hydrogen bonds link molecules into centrosymmetric dimers, which are further packed into stacks along the a axis.
organic compounds
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The asymmetric unit of the title compound, C20H24N2O2S, contains two independent molecules having very similar geometries. The main N-(6-methoxy-1,3-benzothiazol-2-yl)acetamide moiety adopts an almost planar structure (r.m.s. deviations of 0.091 and 0.051 Å for the two independent molecules). The adamantyl substituent occupies the gauche position relative to the C—N bond of the acetamide moiety [the corresponding N–C–C–C dihedral angles are −100.3 (3) and −96.5 (3)° for the two independent molecules]. In the crystal, the two independent molecules form a dimer via a pair of N—HN hydrogen bonds. The dimers are further linked by C—HO hydrogen bonds and attractive SS [3.622 (2) Å] interactions into ribbons along [100].
organic compounds
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In the title compound, C12H9ClN2S, the imidazo[2,1-b]thiazole fragment is planar (r.m.s. deviation = 0.003 Å), and the benzene ring is twisted slightly [by 5.65 (6)°] relative to this moiety. In the crystal, molecules are linked by π–π stacking interactions into columns along [010]. The molecules within the columns are arranged alternatively by their planar rotation of 180°. Thus, in the columns, there are the two types of π–π stacking interactions, namely, (i) between two imidazo[2,1-b]thiazole fragments [interplanar distance = 3.351 (2) Å] and (ii) between an imidazo[2,1-b]thiazole fragment and the phenyl ring [interplanar distance = 3.410 (5) Å]. There are no short contacts between the columns.