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In the title compound, C16H15BrO4S, the thio­phene ring is not coplanar with the benzene ring; the dihedral angle between the two planes is 11.08 (12)°. The crystal structure is characterized by C—H...O inter­actions. Weak intra­molecular C—H...O hydrogen bonds also occur.

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In the title compound, C11H11FN4S, the dihedral angle between the 1,2,4-triazole ring and the benzene ring is 25.04 (12)° and an intra­moleuclar C—H...S inter­action leads to an S(6) ring. In the crystal, inversion dimers linked by pairs of N—H...S hydrogen bonds generate R22(8) loops.

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In the title compound, C16H17NO3S2, the 2H-chromene ring is close to being planar [maximum deviation = 0.034 (2) Å] and the pyrrolidine ring is twisted about the C—C bond opposite the N atom. The dihedral angle between the ring-system planes is 75.24 (16)° and an intra­molecular C—H...S inter­action occurs. In the crystal, mol­ecules are linked by C—H...O hydrogen bonds and the packing also exhibits π–π inter­actions, with a distance of 3.6106 (13) Å between the centroids of the benzene rings of neighbouring mol­ecules.

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In the title compound, C17H19NO2S2, the 2H-chromene ring system is almost planar, with a maximum deviation of 0.044 (2) Å, and the pyrrolidine ring adopts an envelope conformation. The dihedral angle between the 2H-chromene system and the planar part of the pyrrolidine ring is 83.65 (8)°. A weak intra­molecular C—H...S hydrogen bond occurs. The crystal structure features C—H...O hydrogen bonds and π–π inter­actions, with a centroid–centroid distance of 3.5728 (16) Å.

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In the asymmetric unit of the title compound, C10H9FN4S, there are two independent mol­ecules in which the dihedral angles between the 1,2,4-triazole and benzene rings are 36.85 (10) and 7.81 (10)°. In the crystal, N—H...S inter­actions link pairs of independent mol­ecules into dimers. There are also π–π inter­actions between the triazole and benzene rings of inversion-related pairs of the more planar mol­ecule [centroid–centroid distance = 3.6430 (13) Å].

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In the title compound, C17H21NO2S2, the coumarin ring system is nearly planar, with a maximum deviation of 0.080 (2) Å from the mean plane. An intra­molecular C—H...S hydrogen bond occurs. The crystal structure features C—H...S hydrogen bonds and weak π–π inter­actions with a centroid–centroid distance of 3.679 (1) Å.

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In the title compound, C19H17NO6, the dihedral angle between the 2H-chromene ring system and benzene ring is 5.34 (6)°. A short intra­molecular C—H...O contact occurs. In the crystal, mol­ecules are linked by N—H...O hydrogen bonds, generating C(8) chains propagating in [010]. The chains are linked by C—H...O inter­actions and the packing also exhibits π–π stacking inter­actions between benzene and pyran rings, with a centroid–centroid distance of 3.676 (9) Å.

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In the title compound, C12H11FN4S, the thia­diazine ring adopts a twist-boat conformation. The dihedral angle between the triazolothia­diazine system and the benzene ring is 10.54 (9)°. The crystal structure is characterized by C—H...N hydrogen bonds. The crystal packing also exhibits π–π inter­actions, with a centroid–centroid distance of 3.6348 (15) Å.

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In the title compound, C20H19N O2S2,the 3Hbenzo-chromene ring system is nearly planar, with a maximum deviation of 0.036 (2) Å, and the piperidine ring adopts a chair conformation: the bond-angle sum for its N atom is 358.7°. The dihedral angle between the 3H-benzo[f]chromene ring and the piperidine ring is 89.07 (8)°. In the crystal, C—H...O hydrogen bonds lead to [010] C(6) chains and weak aromatic π–π inter­actions between the fused pyran ring and fused benzene ring of benzochromene [centroid–centroid distance = 3.652 (1) Å] are also observed.

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In the title compound, C15H14O4, the dihedral angle between the benzene rings is 67.18 (8)°. The Ca—Cm—O—Ca (a = aromatic and m = methyl­ene) torsion angle is 172.6 (3)° and an intra­molecular O—H...O hydrogen bond generates an S(6) ring. In the crystal, mol­ecules are linked by C—H...O hydrogen bonds into zigzag chains propagating in [001] and C—H...π inter­actions also occur.

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The asymmetric unit of the title compound, C13H8Br2OS, contains two mol­ecules, in which the dihedral angles between the thio­phene and benzene rings are 10.5 (3) and 33.2 (4)°. There are no significant directional inter­actions in the crystal.

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The asymmetric unit of the title compound, C14H11NO5, contains two independent mol­ecules in which the dihedral angles between the benzene rings are 89.27 (16) and 77.14 (12)°. In the crystal, mol­ecules are linked by O—H...O hydrogen bonds, generating C(8) chains propagating in [010] for one mol­ecule and [001] C(8) chains for the other. The chains are connected by C—H...O hydrogen bonds and π–π inter­actions [shortest centroid–centroid distance = 3.5908 (12)°], generating a three-dimensional network.
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