In the title compound, C14H13N3O2·2H2O, the hydrazone molecule adopts an E conformation with respect to the C=N bond. The dihedral angle between the benzene and pyridine rings is 8.55 (10)°. The methylidene–hydrazide [–C(=O)–N–N=C–] fragment is essentially planar, with a maximum deviation of 0.0375 (13) Å. The mean planes of the benzene and pyridine rings make dihedral angles of 2.71 (14) and 11.25 (13)°, respectively, with mean plane of the methylidene-hydrazide fragment. In the crystal, the benzohydrazide and water molecules are linked by N—H⋯O, O—H⋯O and O—H⋯N hydrogen bonds into a three-dimensional network.
In the racemic title compound, C22H21NO3, the nitrogen-containing ring of the pyranoquinoline moiety adopts a slightly distorted half-chair conformation and the oxygen-containing ring adopts a slightly distorted chair conformation. The benzene rings make a dihedral angle of 84.97 (8)°. In the crystal, weak C—H⋯O interactions link the molecules into chains extending along the a-axis direction.
In the title compound, C19H13Br2NO, the dihedral angle between the rings of the biphenyl group is 53.59 (14)°. The ring of the benzamide group is inclined to the phenyl rings of the biphenyl group by 23.87 (15) and 75.89 (15)°. There are no significant intermolecular interactions in the crystal structure.
In the title compound, C20H20N2O2, the quinoline ring system makes dihedral angles of 81.05 (4) and 61.16 (5)° with the mean planes of the benzene and morpholine rings, respectively; the mean planes of the latter two rings make a dihedral angle of 83.59 (4)°. In the crystal, pairs of O—H⋯N hydrogen bonds link neighbouring molecules related by a twofold rotation axis, generating R
In the title compound, C25H17NO4, the indolizine fused naphthaquinone unit is approximately planar [r.m.s deviation = 0.0678 Å] and makes a dihedral angle of 57.82 (5)° with the benzene ring of the methoxybenzene group. The naphthoquinone O atoms deviate, in the same sense, from the mean plane of the fused six-membered rings by 0.2001 (14) and 0.0516 (14) Å. In the crystal there is π–π stacking of inversion-related pairs of molecules [interplanar spacing = 3.514 (2) Å].
In the title compound, C10H10ClNO, the benzoisoxazole ring is almost planar (r.m.s. deviation = 0.0121 Å) and the chloro substituent in the side chain is anticlinal relative to the N—C bond of the isoxazole ring. In the crystal, adjacent molecules are linked via a pair of weak C—H⋯N hydrogen bonds, forming dimers through a cyclic R
The complete molecule of the title compound, C10H4N2S2, is generated by an inversion center situated at the mid-point of the bridging C—C bond. The bithiophene ring system is planar [maximum deviation = 0.003 (2) Å] and the central C—C bond length is 1.450 (2) Å. There are no significant intermolecular interactions in the crystal structure, which is stabilized by van der Waals interactions.
In he title compound, C16H13Br4N, the carbazole skeleton is nearly planar [maximum deviation = 0.026 (4) Å] and makes a dihedral angle of 73.8 (4)° with the butyl chain. The butyl chain adopts a trans conformation. In the crystal, molecules are linked by π–π stacking interactions [centroid–centroid distance = 3.559 (2) Å].
In the title compound, C14H13NO, the two rings show significant deviation from coplanarity, with a dihedral angle between the two planes of 49.40 (5)°. The hydroxy group is involved in an intermolecular O—H⋯N hydrogen bond, forming an extended one-dimensional zigzag chain along (001).
In the title compound, C13H10BrNO, the benzene ring planes are inclined at an angle of 48.85 (17)°, resulting in a nonplanar molecule. A characteristic of aromatic Schiff bases with N-aryl substituents is that the terminal phenyl rings are twisted relative to the HC=N plane. In this case, the HC=N unit makes dihedral angles of 11.1 (4) and 38.5 (3)° with the hydroxybenzene and bromobenzene rings, respectively. In the crystal, the molecules are linked by O—H⋯N hydrogen bonds to form infinite (C8) chains along the b axis.
In the title compound, C23H21N3O, the dihedral angles formed by the mean plane of the triazole ring [maximum deviation = 0.007 (1) Å] and the three phenyl rings are 51.13 (8), 52.84 (8) and 47.04 (8)°. In the crystal, molecules are linked by weak C—H⋯N interactions, forming infinite chains propagating along the b-axis direction.
The title compound, C12H7Br2NO2, a biphenyl derivative, displays a twisted conformation with the two benzene rings making a dihedral angle of 55.34 (14)°. The dihedral angle between the nitro group and its parent benzene ring is 26.8 (2)°. The crystal structure is stabilized by intermolecular C—H⋯Br and C—H⋯O interactions, which lead to the formation of chains propagating along the c-axis direction.
The title compound, C15H12ClNO, is a functionalized 1,2-benzoxazole with a chloro(phenyl)methyl substituent. The molecule is V-shaped, the dihedral angle between the mean plane of the 1,2-benzoxazole system [maximum deviation = 0.023 (3) Å for the N atom] and the phenyl ring being 70.33 (14)°. There are no hydrogen-bonding interactions in the crystal structure, which is stabilized by van der Waals interactions only.
In the title compound C14H17N3O2, the dihedral angle between the rings is 16.68 (13)°. Although the compound crystallizes in the keto form, the possibility of keto-enamine–enol-imine tautomerism is explained by a strong intramolecular N—H⋯O hydrogen bond.