In the title compound, C6H4Cl2OS, the acetyl group is almost coplanar with the thiophene ring [dihedral angle = 4.01 (2)°]. In the crystal, short intermolecular O⋯Cl contacts [2.9494 (14) and 3.1191 (14) Å] link the molecules into infinite (100) sheets and aromatic π–π stacking [centroid–centroid separation = 3.5422 (10) Å] consolidates the packing.
The asymmetric unit of the title compound, C23H15N3S, contains two crystallographically independent molecules. The pyridine rings adopt envelope conformations. The thiophene rings are oriented at dihedral angles of 77.97 (4)/53.53 (4) and 78.44 (4)/57.11 (4)° with respect to the phenyl rings, while the dihedral angles between the phenyl rings are 48.51 (4) and 44.49 (4)°. In the crystal structure, intermolecular N—H⋯N hydrogen bonds link the molecules into chains along the c axis. The S, C and H atoms of one of the thiophene rings are disordered over two orientations, with occupancy ratios of 0.314 (15):0.686 (15).
In the title compound, C15H13Cl2NOS, the benzene and thiophene rings make a dihedral angle of 10.8 (1)°. The dimethylamino substituent and the α,β-unsaturated carbonyl group are almost coplanar with respect to the aromatic ring, forming dihedral angles of 4.73 (3)° and 5.0 (2)°, respectively. In the crystal structure, molecules are connected into two-dimensional layers by weak C—H⋯Cl hydrogen bonds and C—Cl⋯O [Cl⋯O = 3.073 (2) Å] interactions. These layers are stacked with short C(methyl)–H⋯π contacts betweeen the layers.
In the title molecule, C29H22ClN3S, the quinoline ring system, thiophene ring and phenyl ring substituents are inclined at angles of 71.70 (7), 59.26 (9) and 81.61 (9)°, respectively, to the 4,5-dihydropyrazole ring. In the 4-phenylquinoline ring system, the phenyl ring makes a dihedral angle of 62.49 (7)° with mean plane of quinoline ring system. In the crystal structure, molecules are linked via weak intermolecular C—H⋯N hydrogen bonds, forming an extended one-dimensional chain along the b axis and are further consolidated by C—H⋯π and π–π stacking interactions [centroid–centroid distances = 3.7022 (10) Å].
In the title compound, C15H14O2S, the dihedral angle between the aromatic rings is 8.46 –(8)°. The central enone group is planar (r.m.s. deviation = 0.0267 Å) and is oriented at a dihedral angle of 1.20 (9)° with respect to the benzene ring and at 8.27 (9)° with respect to the thiophene group. In the crystal, the molecules are linked into polymeric chains extending along the b axis due to intermolecular O—H⋯O hydrogen bonding. An S(6) ring motif is formed due to a short intramolecular C—H⋯O contact. C—H⋯π interactions involving a methyl group of the 2,5-dimethylthienyl group and the benzene ring are present. π–π interactions between the centroids of the benzene and heterocyclic rings [3.7691 (9) Å] also occur.
In the title compound, C18H20O4S, the thiophene and benzene rings are oriented at a dihedral angle of 10.83 (11)°. The central chain makes dihedral angles of 1.86 (13) and 9.25 (12)° with the benzene and thiophene rings, respectively. In the crystal, molecules are linked through weak intermolecular C—H⋯O interactions. π–π interactions are also observed between the benzene rings with a centroid–centroid distance of 3.6832 (12) Å. The slippage between the benzene rings is 0.956 Å.
In the title compound, C16H10Cl2F3N3S, the dihedral angle between the quinoline and thiophene ring systems is 4.94 (10)°. The NH group of the hydrazone moiety does not form a hydrogen bond, due to a steric crowding. In the crystal, the thiophene ring takes part in weak π–π stacking interactions with the pyridine ring [centroid-to-centroid separation = 3.7553 (19) Å and interplanar angle = 5.48 (12)°] and the benzene ring [3.7927 (19) Å and 4.58 (12)°]. Together, these lead to  stacks of molecules in an alternating head-to-tail arrangement, with two π–π stacking contacts between each adjacent pair.
In the title compound, C17H15FN2O, the pyrazoline ring adopts a flattened envelope conformation. The dihedral angle between the fluoro-substituted benzene ring and the phenyl ring is 69.20 (5)°. In the crystal, a pair of C—H⋯O hydrogen bonds link neighbouring molecules, forming an inversion dimer. The crystal structure is further consolidated by C—H⋯π interactions and by a π–π interaction with a centroid–centroid distance of 3.7379 (6) Å.
The title compound, C29H19F6NOS2, is a new unsymmetrical photochromic diarylethene derivative with different meta-phenyl substituents. The distance between the two reactive (i.e. can be irradiated to form a new chemical bond) C atoms is 3.501 (4) Å; the dihedral angles between the mean plane of the main central cyclopentene ring and the thiophene rings are 47.7 (5) and 45.1 (2)°, and those between the thiophene rings and the adjacent benzene rings are 29.4 (2) and 28.4 (3)°. The three C atoms and the F atoms of hexafuorocyclopentene ring are disordered over two positions, with site-occupancy factors of 0.751 (4) and 0.249 (4).
In the molecule of the title compound, C17H16N2O3S, the phenyl ring is oriented with respect to the thiophene and succinimide rings at dihedral angles of 88.08 (3) and 57.81 (3)°, respectively; the dihedral angle between the thiophene and succinimide rings is 35.69 (3)°. The isoxazole ring adopts an envelope conformation with the N atom at the flap position. In the crystal structure, intermolecular C—H⋯O hydrogen bonds link the molecules into infinite chains along the b axis. Weak C—H⋯π interactions may further stabilize the structure.
In the title compound, C28H23FN6S, the pyrazole ring adopts an envelope conformation, with the methine C atom being the flap atom. With respect to this ring, the 2-thienyl, triazole and fluorobenzene rings are approximately coplanar, coplanar and perpendicular, respectively [dihedral angles = 8.56 (17), 6.03 (19) and 73.1 (2)°, respectively] so that to a first approximation the molecule has a T-shape. In the crystal, molecules are consolidated into a three-dimensional architecture by C—H⋯F (involving a bifurcated F atom), C—H⋯S and C—H⋯π interactions.
In the title compound, C15H12Cl2O3S, the prop-2-en-1-one (enone) fragment is almost planar [C—C—C—O = 2.2 (4)°] and it subtends dihedral angles of 11.9 (2) and 11.0 (2)° with the thiophene and benzene rings, respectively. The dihedral angle between the aromatic rings is 3.47 (16)°. In the crystal, weak C—H⋯O and C—H⋯Cl interactions link the molecules, leading to R
2(24) and C(11) supramolecular motifs occurring within the three-dimensional network. Weak aromatic π–π stacking [centroid–centroid separations = 3.6823 (15) and 3.8722 (15) Å] may also help to consolidate the packing.
The title chalcone derivative, C13H8ClFOS, crystallized as an inversion twin with two independent molecules in the asymmetric unit. The thiophene rings in both molecules are disordered over two sites: the ratios of occupancies for the major and minor components in the two molecules are 0.820 (2):0.180 (2) and 0.853 (2):0.147 (2). The dihedral angles between the major and minor components of the thiophene and benzene rings are 1.13 (18) and 2.2 (6)°, respectively, in one molecule, with corresponding values 6.09 (17) and 1.3 (6)° in the other. Weak intramolecular C—H⋯O and C—H⋯F interactions involving the prop-2-en-1-one group generate an S(5)S(5) ring motif, whereas a weak intramolecular C—H⋯Cl contact generates an S(6) ring motif. In the crystal structure, molecules of both the major and minor components are linked into infinite one-dimensional chains along the b axis. The crystal structure is stabilized by weak C—H⋯O, C—H⋯F, C—H⋯Cl and C—H⋯π interactions.
In the title compound, C12H11N3O2S, the pyridine ring is inclined to the thiophene ring, forming a dihedral angle of 34.96 (7)°. The mean plane through the hydrazide unit forms dihedral angles of 21.57 (8) and 53.08 (8)°, respectively, with the pyridine and thiophene rings. The two O atoms are twisted away from each other, as indicated by the C—N—N—C torsion angle of −81.27 (15)°. In the crystal structure, molecules are linked into an extended three-dimensional network by intermolecular N—H⋯N, N—H⋯O and C—H⋯O hydrogen bonds. The crystal structure also features a short S⋯O [3.2686 (10) Å] interaction and a weak intermolecular C—H⋯π interaction.
In the title compound, C18H12Cl2O2S, the dihedral angle between the thiophene ring and the naphthalene ring system is 2.13 (4)°. In the crystal, pairs of weak intermolecular C—H⋯O hydrogen bonds form centrosymmetric dimers.
The title compound, C12H9BrN2OS·0.06H2O, is a hydrated Schiff base derived from benzoic hydrazide and 4-bromothiophene-2-carboxaldehide. The two Schiff base molecules in the asymmetric unit differ crystallographically: in one molecule the dihedral angle between the benzene ring and thiophene ring is 49.88 (11)°, whereas the other molecule the rings are almost coplanar with an r.m.s. deviation for the non-H atoms of 0.025 Å. In the crystal, molecules form polymeric sheets linked by N—H⋯O and C—H⋯O hydrogen bonds. The water molecule of crystallization is partially occupied and its H atoms could not be located.
In the title compound, C26H23FN6S, the pyrazole ring has an envelope conformation, with the methine C atom being the flap atom. The thiourea group is close to being coplanar with the pyrazole N atoms [N—N—C—S torsion angle = 176.78 (15)°], which allows for an intramolecular N—H⋯N hydrogen bond; the connected triazole ring is nearly coplanar with this ring [N—C—C—N = −172.65 (19)°]. There is a significant twist between the pyrazole ring and attached fluorobenzene ring [N—C—C—C = −18.8 (3)°] and a greater twist between triazole and attached tolyl ring [dihedral angle = 58.25 (14)°]. In the crystal, supramolecular chains aligned along [40,10] are consolidated by π–π interactions between the triazole and phenyl rings [centroid–centroid distance = 3.7053 (13) Å].
In the title compound, C24H17BrFN3S, the pyrazole ring is almost planar (r.m.s. deviation = 0.043 Å), with all but the perpendicular fluorobenzene ring substituents [dihedral angle = 77.9 (3)°] being very approximately coplanar [dihedral angle with the 2-thienyl ring = 19.4 (3)° and with the bromobenzene ring = 20.3 (3)°; dihedral angle between the 2-thienyl and attached phenyl ring = 11.0 (4)°], so that the molecule has a T-shape. In the crystal, supramolecular chains along the b-axis direction are sustained by C—H⋯S and C—Br⋯π interactions.
The central pyrazole ring in the title compound, C17H16FN3S, adopts an envelope conformation with the methine C atom bearing the 4-fluorophenyl substituent as the flap atom. Whereas the tolyl ring is slightly twisted out of the least-squares plane through the pyrazole ring [dihedral angle = 13.51 (11)°], the fluorobenzene ring is almost perpendicular [dihedral angle = 80.21 (11)°]. The thioamide group is almost coplanar with the N—N bond of the ring [N—N—C—N torsion angle = 1.2 (3)°] and the amine group forms an intramolecular hydrogen bond with a ring N atom. In the crystal, supramolecular double layers in the bc plane are formed via N—H⋯S, N—H⋯F and C—H⋯F interactions.
In the molecule of the title compound, C26H22N4S2, the pyrazole ring is oriented at a dihedral angle of 0.85 (3)° with respect to the adjacent naphthyridine ring, while the other ring of naphthyridine adopts an envelope conformation. The dihedral angle between phenyl and pyrazole rings is 87.65 (3)°. In the crystal structure, weak intermolecular C—H⋯N interactions link the molecules into chains. The π–π contacts between the naphthyridine rings and the naphthyridine and thiophene rings [centroid–centroid distances = 3.766 (3) and 3.878 (3) Å] may further stabilize the structure. A weak C—H⋯π interaction is also present.
In the title compound, C25H20N2O, the pyrazoline ring is nearly planar [maximum atomic deviation = 0.0254 (17) Å]; but the anthracene ring system is distorted from a coplanar structure [maximum atomic deviation = 0.181 (3) Å], the dihedral angle between the outer benzene rings being 10.68 (13)°. The pyrazoline ring is almost perpendicular to the mean plane of the anthracene ring system [dihedral angle = 76.94 (8)°], but nearly coplanar with the phenyl ring [dihedral angle = 1.63 (7)°]. π–π stacking is observed between parallel benzene rings of adjacent anthracene units, the face-to-face distance being 3.27 (3) Å. Weak intramolecular C—H⋯N hydrogen bonding also occurs.
The molecule of the title heteroaryl chalcone, C16H16O4S, which consists of substituted thiophene and benzene rings bridged by the prop-2-en-1-one group, is slightly twisted. The dihedral angle between the thiophene and 3,4,5-trimethoxyphenyl rings is 12.18 (4)°. The three methoxy groups have two different conformations; two methoxy groups are coplanar [C—O—C—C torsion angles = −1.38 (12) and 0.47 (12)°] whereas the third is (-)-synclinal with the benzene ring. In the crystal structure, adjacent molecules are linked in a face-to-side manner into chains along the c axis by weak C—H⋯O(enone) interactions. These chains are stacked along the b axis by weak C—H⋯O(methoxy) interactions.
In the crystal structure of the title compound, C15H16O2S, the thiophene ring is essentially planar (r.m.s. deviation = 0.006 Å for all non-H atoms) and roughly coplanar with the benzene ring, the dihedral angle between the mean planes of the rings being 4.35 (8)°. An intramolecular O—H⋯O hydrogen bond is observed between the OH group and the aldehyde O atom.
The crystal structure of the title compound, C17H16N2O3S, exhibits intramolecular C—H⋯S and intermolecular C—H⋯S and C—H⋯O hydrogen bonds, C—S⋯N [S⋯N = 3.033 (2) Å and C—S⋯N = 142.76 (9)°] interactions, and C—H⋯π interactions; these interactions generate S(4), S(6) and R
2(14) ring motifs. The isoxazole ring adopts an envelope conformation, with the N atom displaced by 0.672 (2) Å from the plane of the other ring atoms. The thiophene ring is oriented with respect to the succinimide and phenyl rings at dihedral angles of 40.03 (12) and 5.21 (13)°, respectively. The dihedral angle between the succinimide and phenyl rings is 39.38 (12)°.
The title compound, C22H13ClF6S, is a hybrid diarylethene derivative with one 3-thienyl substituent, and a Cl-substituted six-membered aryl unit bonded to the double bond of a hexafluorocyclopentene ring. In the crystal structure, the molecule adopts a photo-active antiparallel conformation that can undergo effective photocyclization reactions. The distance between the two reactive C atoms is 3.848 (3) Å. The dihedral angles between the least-squares cyclopentene plane and those of the adjacent thiophene and chlorophenyl rings are 49.39 (8) and 59.88 (8)°, respectively. The F atoms are disordered over two positions, with site occupancy factors of 0.6 and 0.4.