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The title molecule, C13H8BrN3O5, is slightly twisted, with the dihedral angle between the two benzene rings being 5.9 (1)°. In the crystal, N—HO hydrogen bonds link the molecules into one-dimensional chains running along [101]. Further stabilization of the crystal structure is provided by π–π interactions [shortest centroid–centroid distance = 3.6467 (17) Å].
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The title molecule, C16H13N3O7, is slightly twisted, with the dihedral angle between the two benzene ring planes being 17.4 (1)°. An intramolecular N—HO hydrogen bond is observed. In the crystal, weak C—HO hydrogen bonds link the molecules into chains along the b axis.
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The asymmetric unit of the title salt, C12H24N+·C7H3N2O6−, contains two cations and two anions. In the crystal, the cations and anions are connected by N—HO hydrogen bonds, forming a 12-membered ring with an R44(12) graph-set motif. The center of this 12-membered ring coincides with an inversion centre. π–π stacking is observed between parallel benzene rings [centroid–centriod distance = 3.771 (2) Å].
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In the title compound, C19H33NO, all three cyclohexane rings adopt chair conformations. The crystal packing features weak C—HO interactions, forming a supramolecular chain along the c axis.
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The title compound, C19H26N2O3, crystallizes with two independent molecules in the asymmetric unit which differ in the twist of the phenyl rings with respect to the plane of the amide group [the C—C—C—O torsion angles are 121.5 (3) and −119.6 (3)° in the two molecules. Both cyclohexane rings adopt chair conformations. In the crystal, weak C—HO interactions occur. The crystal studied was a non-merohedral twin with a minor component of 4.8 (1)%.
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The title compound, C13H9ClN2O3, is almost planar, showing a dihedral angle of 4.63 (6)° between the aromatic ring planes. The nitro group also lies in the plane, the C—C—N—O torsion angle being 6.7 (2)°. There is an intamolecular C—HO hydrogen bond. The crystal structure features N—HO(nitro) hydrogen bonds that link the molecules into zigzag chains extending along [010].
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The asymmetric unit of the title compound, C17H18N2O4, contains two independent molecules (A and B) differing principally in the conformations of the alkyl chains, anti for molecule A and gauche for molecule B. The dihedral angles between the aromatic rings are 82.51 (6) and 82.25 (6)° in the two molecules. In the crystal, amide–amide interactions (as N—HO=C) results in distinct chains of A and B molecules running parallel to the a-axis direction. C—HO interactions also occur.
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In the title compound, C19H25N3O5, the benzene ring is not coplanar with the amide group [dihedral angle = 61.90 (5)°]. The cyclohexyl rings are in chair conformations. There is a strong intermolecular interaction between the C=O group of the amide group and the nitro group of an adjoining molecule, with a short ON distance of 2.7862 (17) Å. In the crystal, C—HO interactions occur along the [100] direction.
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The asymmetric unit of the title compound, C16H13N2O+·NCS−·C16H12N2O, contains two N-(pyridin-4-yl)naphthalene-2-carboxamide molecules, both are partially protonated in the pyridine moiety, i.e. the H atom attached to the pyridine N atom is partially occupied with an occupancy factor of 0.61 (3) and 0.39 (3), respectively. In the crystal, protonated and neutral N-(pyridin-4-yl)naphthalene-2-carboxamide molecules are linked by N—HN hydrogen bonding; the thiocyanate counter-ion links with both protonated and neutral N-(pyridin-4-yl)naphthalene-2-carboxamide molecules via N—HS and N—HN hydrogen bonding. The dihedral angles between the pyridine ring and naphthalene ring systems are 11.33 (6) and 9.51 (6)°, respectively. π–π stacking is observed in the crystal structure, the shortest centroid–centroid distance being 3.5929 (8) Å. The crystal structure was determined from a nonmerohedral twin {ratio of the twin components = 0.357 (1):0.643 (1) and twin law [-100 0-10 -101]}.
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In the title compound, C10H10N4O5S·C9H9N3O5, the amide groups of 3-(3,5-dinitro-benzoyl)-1,1-dimethyl-thiourea and N,N-dimethyl-3,5-dinitro-benzamide molecules are oriented at dihedral angles of 39.13 (8) and 55.97 (11)°, respectively, to the attached benzene rings. In the crystal, the two molecules are linked by an N—HO hydrogen bond. Weak C—HO link the molecules into a sheet parallel to the bc plane. C—HS interactions also occur.