In the title compound, C18H12F4N2S2, a bis-thio-phenyl Schiff base ligand with a perifluorinated aromatic core, the complete molecule is generated by crystallographic inversion symmetry. The thio-phene and tetra-fluorinated benzene rings are oriented at a dihedral angle of 77.38 (4)°. The crystal structure exhibits C-H⋯F hydrogen bonds, resulting in supra-molecular chains along the c-axis direc...

The title compound C(18)H(16)N(2)S(2), crystallizes with two independent half-mol-ecules in the asymmetric unit, in one of which the thio-phene rings are disordered in a 0.67:0.33 ratio. Each independent mol-ecule lies across a crystallographic centre of symmetry. The dihedral angle between central (half) benzene ring and the thiophene ring is 11.82°.

The title mol-ecule, C(22)H(22)Br(4)O(2)S(2), is centrosymmetric with an inversion centre located at the centre of the benzene ring. The 3,5-dibromo-thio-phene groups are twisted relative to the benzene ring, making a dihedral angle of 41.43 (9)°.

In the crystal structure of the title compound, C(12)H(10)N(2)O(2)S, the benzene and the 2-nitro-thio-phene rings make a dihedral angle of 7.47 (12)°. The dihedral angle between the nitro group and the attached ring is 1.9 (6)°.

In the title compound, C17H10F3NS, the dihedral angle between the fused benzo-thio-phene ring system (r.m.s. deviation = 0.042 Å) and the benzene ring is 29.78 (11)°. The crystal structure features C-H⋯F and very weak C-H⋯N hydrogen bonds, which generate (001) sheets.

In the title mol-ecule, C22H15Br2N3O2S, the central benzene ring forms dihedral angles of 12.39 (17), 56.66 (17) and 74.71 (19)°, respectively, with the mean planes of the thio-phene and two pyridine rings. The dioxane ring is in a half-chair conformation. An intra-molecular C-H⋯O hydrogen forms an S(6) ring. The amine N atom is sp (2)-hybridized.

In the title compound, C(21)H(33)N(4)S(3) (3+)·3I(-), three secondary amines are protonated, while the central amine remains unprotonated. One thio-phene is disordered with an occupancy ratio of 0.868 (6)/0.132 (6). Each protonated amine is involved in N-H⋯I hydrogen-bonding inter-actions with the iodide anions.

The dihedral angle between the benzene and thio-phene rings in the title compound, C(12)H(10)N(2)O(3)S, is 27.94 (13)°. An inter-molecular C-H⋯π inter-action contributes to the stability of the crystal structure.

In the title conpound, C(16)H(12)N(2)O(2)S, the 1-benzothio-phene residue and the substituted benzene ring are oriented at a dihedral angle of 53.36 (6)°. The mol-ecular conformation features a short C-H⋯N contact. There are no significant inter-molecular contacts.

In the title mol-ecule, C(16)H(15)ClO(4)S, the chloro-thio-phene and trimeth-oxy-phenyl rings make a dihedral angle of 31.12 (5)°. The C=C double bond exhibits an E conformation. In the crystal, C-H⋯O inter-actions generate bifurcated bonds, linking the mol-ecules into chains along the b axis.