In the title compound, C(9)H(10)ClNOS, the dihedral angle between the planar thio-phene ring and 2-chloro-ethane moiety (r.m.s deviations of 0.003 and 0.015 Å, respectively) is 45.79 (6)°. The tetra-hydro-pyridine ring adopts a half-chair conformation. The crystal packing reveals inter-molecular C-H⋯O inter-actions.

In the title compound, C21H17NS, the C=N double bond shows an E conformation. The dihedral angle between the mean planes of the naphthyl residue and the benzo-thio-phene residue is 89.14 (6)°. The crystal packing is stabilized by inter-molecular C-H⋯π inter-actions, building a ribbon structure along the a axis.

In the title compound, C(13)H(12)N(2)O(2)S, the dihedral angle between the benzene and thio-phene rings is 36.72 (8)°. An inter-molecular C-H⋯π inter-action contributes to the stability of the crystal structure.

In the title compound, C(28)H(28)N(4)O(4)S, the dihedral angles between the central thio-phene ring and its pendant oxadiazole rings are 1.2 (3) and 9.8 (3)°. The dihedral angles between the oxadiazole and phenyl rings are 2.9 (3) and 1.8 (3)°. Some short intra-molecular C-H⋯O contacts occur.

In the title compound, C(22)H(15)I(2)NS(2), the two thio-phene rings are twisted out of the plane of the central pyrrole ring, making dihedral angles of 32.4 (2)° and 9.8 (2). In the crystal, neighboring mol-ecules are linked into centrosymmetric dimers by pairs of C-H⋯I inter-actions.

The title compound, C(19)H(17)BrO(3)S, crystallizes with two mol-ecules in the asymmetric unit. The methyl group of one mol-ecule is disordered approximately equally over two positions. The dihedral angles between the thio-phene and phenyl groups are 68.5 (2) and 67.5 (2)° in the two mol-ecules.

In the title compound, C(20)H(16)N(4)O(2)S(2), one of the thio-phene rings is disordered [occupancy ratio 0.710 (4):0.290 (4)] and the disorder is of the flip type. An intra-molecular C-H⋯O hydrogen bond generates a six-membered ring with an S(6) motif.

In the title mol-ecule, C17H16N2O2S, the tetra-hydro-pyridine ring exhibits a half-chair conformation. The mean planes of the ester chain and benzene ring are twisted by 5.5 (1) and 81.32 (5)°, respectively, from the plane of thio-phene ring. In the crystal, weak C-H⋯O inter-actions link mol-ecules related by translation along [100] into chains.

The mol-ecules of the title compound, C(28)H(18)N(2)S, are built up from two triply-fused rings and one five-membered ring, with dihedral angles of 66.12 (8) and 70.96 (7)° between the central thio-phene ring and the two triply-fused rings.

The title compound, C(12)H(9)IN(2)OS, has an overall U-shape, with a dihedral angle of 21.4 (3)° between the thio-phene and benzene rings. In the crystal, supra-molecular chains mediated by N-H⋯O hydrogen bonds are formed along the b-axis direction.