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In the title compound, C13H12FN3O4, the dihedral angle between the benzene and imidazole rings is 32.77 (12)°. In the crystal, mol­ecules are linked into a three-dimensional network by C—H...O hydrogen bonds.

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The asymmetric unit of the title compound, C17H13N, contains two independent butterfly-shaped mol­ecules. The seven-membered azepine rings both adopt a boat conformation. The dihedral angles between the benzene rings in the two mol­ecules are 46.95 (11) and 52.21 (11)°.

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In the title compound, C13H12BrN3O4, the dihedral angle between the benzene and imidazole rings is 30.6 (2)°. In the crystal, mol­ecules are linked into chains parallel to [001] by C—H...O hydrogen bonds. The crystal packing is further consolidated by π–π inter­actions [centroid–centroid distance = 3.482 (2) Å].

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The crystal structure of the title compound, C8H6FN3O, is stabilized by C—H...O hydrogen bonds, which link the mol­ecules into chains running parallel to the a axis.

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In the mol­ecule of the title compound, C9H9N3O, the angle formed by the least-squares line through the azide group with the normal to the plane of the benzene plane ring is 46.62 (16)°. The crystal structure features C—H...O hydrogen bonds, which link the mol­ecules into zigzag chains running parallel to [010].

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In the title compound, C8H6N4O3, the ketone [C—C(=O)—C] and nitro groups are tilted with respect to the benzene ring by 18.92 (6) and 24.11 (15)°, respectively. In the crystal, mol­ecules are linked into inter­woven chains running parallel to the [100] direction by C—H...N hydrogen bonds and weak π–π stacking inter­actions, with centroid–centroid separations of 3.897 (3) Å.

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The asymmetric unit of the title compound, C7H11N3O5S, contains two independent mol­ecules with virtually identical conformations. The imidazole rings of both mol­ecules are essentially planar (r.m.s. deviations = 0.0019 and 0.0038 Å), with a dihedral angle 9.25 (19)° between them. The nitro groups are oriented at 4.5 (2) and 6.44 (13)° with respect to the imidazole rings. In the crystal, mol­ecules are linked to form a three-dimensional framework by C—H...O and C—H...N hydrogen bonds.

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In the title compound, C15H14N2O5, the central amide C—C(=O)—N—C unit forms dihedral angles of 28.17 (13) and 26.47 (13)° with the two benzene rings, whereas the two benzene rings are almost coplanar, making a dihedral angle of 4.52 (13)°. The two meth­oxy and the nitro substituents are almost coplanar with their attached benzene rings, with C—O—C—C torsion angles of −1.3 (4) and −4.6 (4)°, and an O—N—C—C torsion angle of 17.1 (3)°. In the crystal, mol­ecules are linked via C—H...O and N—H...O inter­actions, forming a tape running along the b axis.
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