The title compound, C25H19N, adopts an E conformation about the C=N bond. The naphthalene ring system and the phenyl rings form dihedral angles 38.1 (1), 46.9 (8) and 48.5 (1)°, respectively, with the mean plane of the central enimino fragment. The crystal packing exhibits no directional close contacts.
In the title compound, C22H20N2O2S, the molecule adopts a twisted E configuration around the C=N bond. The two phenyl rings are twisted from each other, making a dihedral angle of 78.00 (12)°. The methyl-substituted benzene ring makes dihedral angles of 32.37 (14) and 69.70 (12)° with the two phenyl rings. In the crystal structure, molecules are linked into extended chains along the b axis through intermolecular N—H⋯O hydrogen bonds.
In the title compound, C21H16N2O2, the dihedral angles between the mean planes of the 4-nitrophenyl ring and the two phenyl rings are 57.3 (5) and 16.8 (6)°. The imine group displays a C—C—N—C torsion angle of −24.9 (3)°.
In the title compound, C22H16F3N, the C=N bond of the central imine group adopts an E conformation. The dihedral angles between the 2-(trifluoromethyl)phenyl ring and the benzene rings are 9.34 (1) and 68.8 (1)°. The imine group displays a C—C—N=C torsion angle of 41.6 (3)°. In the crystal, weak C—H⋯F hydrogen bonds link the molecules into chains parallel to the b-axis direction.
The complete molecule of the title compound, C42H36N6O2, is generated by a crystallographic twofold axis with two C atoms of the central phenyl group lying on the axis. In the independent part of the molecule, one amino group is involved in an intramolecular N—H⋯O hydrogen bond, and the two adjacent phenyl rings are twisted from the plane of the pyrazolone ring with dihedral angles of 6.82 (3) and 88.32 (6)°. The crystal packing exhibits no classical intermolecular contacts.
The title compound, C18H12N2, adopts an E conformation with the benzylidenemalononitrile and phenyl groups located on opposite sides of the C=C bond. The two phenyl rings are oriented at a dihedral angle of 62.49 (7)°.
In the title molecule, C25H21N5O3S, the triazole ring forms dihedral angles of 21.4 (2), 61.4 (2) and 102.4 (2)° with the nitrophenyl and two phenyl rings, respectively. In the crystal, weak C—H⋯O hydrogen bonds and π–π interactions between the benzene rings from neighbouring molecules [with a centroid–centroid distance of 3.571 (3) Å] consolidate the crystal packing.
The title compound, C16H13NO3, crystallizes with two independent molecules (A and B) in the asymmetric unit. The dihedral angle between the mean planes of the 4-methylphenyl and 3-nitrophenyl groups is 4.0 (3)° in molecule A and 16.2 (7)° in molecule B. Intermolecular C—H⋯O hydrogen bonding involving the O atoms of the 3-nitrophenyl group of both independent molecules link the molecules into layers approximately parallel to the (110) plane. The layers are held together by π–π stacking interactions between the 4-methylphenyl ring of molecule A and the 3-nitrophenyl ring of molecule B of the adjacent layer, with the distance between the centroids of interacting rings being 3.6987 (7) Å.
The title compound, C26H18N4O5, can be regarded as an extended ether with two terminal nitro groups. The two aryl rings bonded to the central O atom form a dihedral angle of 75.72 (6)°, and the terminal nitro groups are slightly twisted [by 6.4 (2) and 3.3 (3)°] from the benzene rings to which they are attached. The crystal packing exhibits weak intermolecular C—H⋯O hydrogen bonds and π–π interactions [centroid–centroid distances = 3.794 (3) Å].
In the title compound, C22H26N4O2, the phenyl ring and hydroxybenzene group are twisted with respect to the central pyrazolone ring, making dihedral angles of 54.05 (5) and 21.80 (6)°, respectively. One of the ethyl groups is disordered over two positions with site occupancies of 0.872 (6) and 0.128 (6). The molecular structure features short intramolecular O—H⋯N and C—H⋯O contacts. The crystal packing exhibits weak intermolecular C—H⋯O and C—H⋯π interactions.
The molecule of the title compound, C26H24N4O7S, adopts a trans conformation about the central N—N bond, presumably to minimize steric between the substituents on these two atoms. An intramolecular N—H⋯O hydrogen bond occurs. The phenyl ring is disordered over two sets of sites, with an occupancy ratio of 0.624 (8):0.376 (8). The azolidine ring is essentially planar [maximum deviation = 0.008 (5) Å] and makes a dihedral angle of 4.3 (2)° with the benzene ring and dihedral angles of 74.1 (3) and 69.1 (5)°, respectively, with the mean planes of the major and minor components of the disordered phenyl ring. The packing in the crystal is aided by the formation of several weak C—H⋯O and C—H⋯N interactions.
In the title compound, C25H21N5O3S·CH2Cl2, the dichloromethane solvent molecule is disordered over four positions, with an occupancy ratio of 0.271 (3):0.3884 (18):0.298 (2):0.0424 (15). The 1,2,4-triazole ring makes dihedral angles of 47.3 (2)/87.3 (2) and 3.6 (2)° with the phenyl and nitrophenyl rings, respectively. An intramolecular C—H⋯S hydrogen bond results in the formation of an almost planar six-membered ring [r.m.s. derivation = 0.0051 (2) Å]. Intermolecular C—H⋯O hydrogen bonding consolidates the structure.
The title compound, C15H16F3NO4, is an N-substituted derivative of ortho-trifluoromethylaniline featuring a twofold Michael system. The least-squares planes defined by the atoms of the phenyl ring and the atoms of the Michael system enclose an angle of 15.52 (5)°. Apart from classical intramolecular N—H⋯O and N—H⋯F hydrogen bonds, intermolecular C—H⋯O contacts are observed, the latter connecting the molecules into chains along . The shortest intercentroid distance between two aromatic systems is 3.6875 (9) Å.
The title compound, C15H13N3O2S2, was obtained from a condensation reaction of benzyl dithiocarbazate and 2-nitrobenzaldehyde. In the molecule, the nearly planar dithiocarbazate fragment [r.m.s deviation = 0.0264 Å] is oriented at dihedral angles of 7.25 (17) and 74.09 (9)°with respect to the two benzene rings. The nitro group is twisted by a dihedral angle of 22.4 (7)° to the attached benzene ring. The nitrobenzene ring and dithiocarbazate fragment are located on the opposite sides of the C=N bond, showing an E configuration. In the crystal, molecules are linked via intermolecular N—H⋯S hydrogen bonds, forming centrosymmetric supramolecular dimers. Weak C—H⋯π interaction is also observed in the crystal structure.
In the title compound, C17H19N5O5, obtained from the condensation reaction of 4-diethylamino-2-hydroxybenzaldehyde and 2,4-dinitrophenylhydrazine, the two benzene rings are twisted by a dihedral angle of 1.75 (12)°. The nitro groups are slightly twisted with the respect to the benzene ring to which they are attached, making dihedral angles of 8.20 (15) and 5.78 (15)°. An intramolecular O—H⋯N hydrogen bond occurs. In the crystal, molecules are linked by pairs of intermolecular N—H⋯O hydrogen bonds, forming dimers through R
2(12) rings. These dimers are further linked by C—H⋯O and C—H⋯π and weak slipped π–π interactions [centroid–centroid distance = 3.743 (2)Å]. One of the ethyl groups is disordered over two positions, with occupancy factors in the ratio 0.72:0.28.
In the title compound, C13H10N2O2, a Schiff base derivative, the dihedral angle between the two aromatic rings is 31.58 (3)°. The C=N double bond is essentially coplanar with the nitrophenyl ring. The torsion angle of the imine double bond is 175.97 (13)°, indicating that the C=N double bond is in a trans configuration. The crystal structure is stabilized by C—H⋯O contacts and π–π interactions (centroid–centroid distances of 3.807 and 3.808Å).
The title compound, C13H12N2OS, was obtained from the condensation reaction of 2-acetylthiophene and benzohydrazide. In the molecule, the formohydrazide fragment is approximately planar (r.m.s deviation = 0.0146 Å) and the mean plane is oriented at dihedral angles of 24.47 (11) and 28.86 (13)°, respectively, to the phenyl and thiophene rings. The thiophene and phenyl rings make a dihedral angle of 53.21 (8)°. The benzamide fragment and thiophene ring are located on the opposite sides of the C=N bond, showing an E conformation. Classical intermolecular N—H⋯O hydrogen bonds and weak C—H⋯O interactions are present in the crystal structure: three such bonds occur to the same O-atom acceptor.
The asymmetric unit of the triclinic polymorph of the title compound, C21H25N3O3, consists of two molecules, whereas for the monoclinic polymorph Z′ = 1 [Fun et al. (2009 ▶). Acta Cryst. E65, o445]. The two molecules exhibit an E configuration with respect to the C=N bond. The molecules are linked into dimers by N—H⋯O and C—H⋯O hydrogen bonds forming R
2(8) ring motifs. In addition, π–π interactions occur between nitrophenyl groups [minimum centroid–centroid distance 3.940 (2) Å], stacking the molecules along the ac plane.
The molecule of the title Schiff base compound, C16H15N3O5, obtained from a condensation reaction of 4-acetoxy-3-methoxybenzaldehyde and 4-nitrophenylhydrazine, adopts an E geometry with respect to the C=N double bond. The molecule is roughly planar, with the two benzene rings twisted slightly with respect to each other by a dihedral angle of 6.90 (9)°. In the crystal, intermolecular N—H⋯O hydrogen bonds link centrosymmetrically related pairs of molecules, forming dimers of R
2(22) graph-set motif. The dimers are further connected through slipped π–π interactions between symmetry-related benzene rings [centroid–centroid distance of 3.646 (1) Å, offset angle of 15.4°].
In the title compound, C36H30N6O3S3, the phenyl rings are twisted from the attached oxadiazole rings in the three arms by 1.5(2), 2.4 (2) and 25.7 (2)°. The crystal packing exhibits weak intermolecular C—H⋯N interactions.
In the title molecule, C23H18FN3O2, the mean plane of the indole system forms dihedral angles of 44.23 (8) and 14.54 (7)°, respectively, with the phenyl and benzene rings. In the crystal, intermolecular N—H⋯O hydrogen bonds link molecules into two-layer ribbons extended along the b axis. The crystal packing also exhibits weak intermolecular C—H⋯O, C—H⋯F and C—H⋯π interactions.
The asymmetric unit of the title compound, C16H14N4O4, contains one half-molecule of (nitrophenyl)ethanimine and the complete molecule is generated by a crystallographic inversion centre. The molecule has an E conformation with respect to each C=N double bond. The central C=N—N=C plane is twisted from the benzene rings with a dihedral angle of 24.76 (11)°. In the crystal, C—H⋯O interactions link the molecules to form sheets that lie parallel to (10-4).
Crystals of the title compound, C15H15N3O3, were obtained from a condensation reaction of 4-nitrophenylhydrazine and 3-methoxyacetophenone. In the crystal structure, the methoxyphenyl ring is twisted slightly with respect to the nitrophenylhydrazine plane, making a dihedral angle of 14.81 (8)°. The nitro and methoxy groups are each coplanar with the attached benzene rings. The nitrophenyl and methoxyphenyl groups are located on opposite sides of the C=N double bond, indicating an E configuration of the molecule. Adjacent molecules are linked together via N—H⋯O hydrogen bonding, forming chains along the  direction.
In the title compound, C15H13N3O3, the dihedral angle formed by the two benzene rings is 44.23 (2)°. The crystal structure is stabilized by aromatic π–π stacking interactions, with centroid-centroid distances of 3.825 (3) and 3.870 (4) Å between the aniline and the nitrobenzene rings of neighbouring molecules, respectively. In addition, the stacked molecules exhibit intermolecular C—H⋯N and C—H⋯O interactions.
The asymmetric unit of the title compound, C28H24N2O2S2, contains one-half molecule, which is completed by twofold rotation symmetry with the twofold axis passing through the mid-point of the central S—S bond. The planes of the two benzene rings linked by the disulfide chain form a dihedral angle of 76.1 (1)°, while the planes of the two benzene rings in the benzylideneaniline fragment form a dihedral angle of 48.9 (1)°. The crystal packing exhibits no significantly short intermolecular contacts.