organic compounds
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The title compound, C10H13N3O3, adopts an E conformation with respect to the azomethine bond and crystallizes in the amide form. A classical intramolecular O—HN hydrogen bond is present. The two N atoms of the hydrazinecarboxamide unit are also involved in intermolecular N—HO hydrogen bonds, with the O atom of the hydrazinecarboxamide group acting as the acceptor. Pairs of N—HO hydrogen bond link the molecules into centrosymmetric dimers, which are linked by further N—HO hydrogen bonds into chains along the b axis. The chains are linked by C—Hπ interactions.
metal-organic compounds
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The title compound, [CuCl2(C19H16N4O)], contains a CuII atom N,N′,O-chelated by a neutral N-phenylhydrazinecarboxamide ligand and additionally coordinated by two Cl atoms, resulting in a distorted square-pyramidal geometry. The ligating atoms in the basal square plane of the complex comprise the azomethine N, the pyridine N, the amide O and one of the Cl atoms, whereas the other Cl atom occupies an apical position. The apical Cl atoms in adjacent layers function as hydrogen-bond acceptors to both NH groups. Intermolecular C—HCl and C—HO interactions are also observed.
organic compounds
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The title compound, C14H13N3O3·H2O, adopts an E conformation with respect to the azomethine bond and crystallizes in the amide form. An intramolecular O—HN hydrogen bond occurs. In the crystal, the lattice water molecule plays a major role in the supramolecular architecture by interconnecting adjacent molecules into a three-dimensional netwrok by means of O—HO, O—HN and N—HO hydrogen-bonding interactions. The structure also features two non-classical C—HO interactions.
organic compounds
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N′-[(E)-4-Benzyloxy-2-hydroxybenzylidene]-4-nitrobenzohydrazide dimethylformamide monosolvate
The title compound, C21H17N3O5·C3H7NO, exists in an E conformation with respect to the azomethine double bond of the hydrazide molecule. This molecule contains an intramolecular O—HN hydrogen bond, while an intermolecular N—HO hydrogen bond links the hydrazide to the formamide molecule of solvation. Nonclassical C—HO intermolecular hydrogen bonds build up a supramolecular architecture, together with two C—Hπ interactions and a weak π–π interaction, with a centroid–centroid distance of 3.650 (13) Å.
organic compounds
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In the title compound, C24H18S, the dihedral angles between the phenyl ring and the two benzene rings of the anthracene moiety are 51.92 (9) and 68.24 (9)°, whereas the dihedral angle between the two anthracene benzene rings is 120.13 (9)°. The three non-aromatic six-membered rings are in boat conformations, while the five-membered ring has an envelope conformation on the S atom. In the crystal, there are three C—Hπ interactions, which facilitate the packing of the molecules.
organic compounds
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The phenyl and tert-butyl groups of the title compound, C27H25NO3, exhibit a trans configuration in agreement with the stereochemistry of the Z phenyl-N-tert-butylnitrone starting material. The attached carbonyl groups are not coplanar with the neighboring dihydroisoxazole ring and the phenyl rings they are bonded to, with torsion angles of 59.26 (8), 17.53 (11), 16.52 (12) and 52.86 (7)°. The dihedral angle between the dihydroisoxazole ring and the directly attached phenyl group is 86.86 (8)°. There are two nonclassical intermolecular C—HO hydrogen-bonding interactions that operate together with an intermolecular C—Hπ interaction to form a supramolecular architecture in the crystal system.
organic compounds
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In the title compound, C12H11N3O3·2H2O, the dihedral angle formed by the planes of the pyridine and the furan rings of the organic carbohydrazide molecule is 4.66 (7)°. In the crystal, these molecules form stacks along the b-axis direction, neighbouring molecules within each stack being related by inversion and the shortest distance between the centroids of the pyridine and furan rings being 3.714 (1) Å. Molecules from neighboring stacks are linked by pairs of N—HO hydrogen bonds. The water molecules fill the channels between the stacks being linked by O—HO hydrogen bonds into helices along [010]. Besides this, water molecules are involved in O—HN and O—HO hydrogen bonds with the carbohydrazide molecules, thus forming a three-dimensional network, augmented by weak C—HO interactions.
organic compounds
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The title compound, C15H12N4O, adopts an E conformation with respect to the azomethine bond and crystallizes in its hydrazinylidene tautomeric form. The dihedral angle between the ring systems is 15.98 (7)°. The phenol O—H group forms an intramolecular O—HN hydrogen bond. In the crystal, pairs of N—HN and C—HO hydrogen bonds link neighbouring molecules into centrosymmetric dimers. These dimers are interconnected by means of three types of π–π stacking interactions. One, with a centroid–centroid distance of 3.577 (1) Å [interplanar separation = 3.4673 (6) Å], connects adjacent molecules into centrosymmetric dimers. The other two interactions, on the outward facing sides of the dimers, are between phenol rings of neighboring molecules [centroid–centroid separation = 3.7907 (13) Å and interplanar separation = 3.5071 (8) Å], and between phthalazin units [centroid–centroid separation = 3.6001 (12) Å and interplanar separation = 3.4891 (7) Å]. In combination, the π–π interactions lead to the formation of infinite layers with molecules stacked along [0-11]. These layers are, in turn, connected with neighbouring layers through the N—HN and C—HO hydrogen bonds, yielding a three-dimensional supramolecular architecture.
organic compounds
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The title compound, C15H13N3O3, exists in the E conformation with respect to the azomethane C=N double bond. The pyridyl and phenyl rings form dihedral angles of 35.67 (8) and 36.65 (7)°, respectively with the central C(=O)N2C unit. In the crystal, N—HO and C—HO hydrogen bonds connect the molecules into chains along the b axis. Another C—HO interaction connects molecules along the c-axis direction, forming layers.
organic compounds
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The title azine molecule, C28H24N2O4, lies about a center of inversion. The dihedral angle between the phenyl ring and the hydroxy-substituted ring is 70.3 (5)°. The phenolic O-H group forms an intramolecular hydrogen bond to the azine N atom.
organic compounds
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The title compound, C15H13BrN2O3·H2O, exists in an E conformation with respect to the azomethane C=N double bond. The benzene and phenyl rings form dihedral angles of 0.46 (2) and 4.90 (3)°, respectively with the central C(=O)N2C unit. An intramolecular O—HN hydrogen bond occurs. In the crystal, some hydrazide molecules are replaced by molecules of the 6-bromo isomer. The Br atom from this admixture was refined to give a partial occupancy of 0.0443 (19). A supramolecular network is built in the lattice by means of intermolecular N—HO and two O—HO interactions together with non-classical C—HO interactions involving the lattice water molecule stacking the molecules along the b-axis direction.
organic compounds
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The asymmetric unit of the title compound, C14H11FN2O, contains two independent molecules, both of which adopt the E conformation with respect to the azomethine C=N bond. The molecules are non-planar, with dihedral angles of 26.92 (12) and 11.36 (11)° between the benzene and phenyl rings. In the crystal, molecules are linked through N—HO=C and N—HN hydrogen bonds into chains along [101]. C—HO contacts link these chains into layers parallel to (001). The three-dimensional crystal packing is stabilized by π–π interactions, the shortest separation between the centroids of benzene rings being 3.884 (1) Å.