The asymmetric unit of the title compound, C15H15NO, contains two independent molecules, both of which exist in trans configurations with respect to the C=N bonds [1.278 (2) and 1.279 (2) Å]. In each molecule, intramolecular O—H⋯N hydrogen bonds generate S(6) ring motifs. In one molecule, the benzene rings form a dihedral angle of 13.38 (9)°, while in the other molecule the dihedral angle is 30.60 (10)°. In the crystal, the two independent molecules are linked via weak intermolecular C—H⋯O hydrogen bonds.
In the title compound, C19H22N2O2, the morpholine ring adopts an almost perfect normal chair conformation with puckering parameters Q
T, θ and ϕ of 0.5642 (18) Å, 177.32 (17) and ϕ = 10 (4)°, respectively. The two benzene rings make a dihedral angle of 42.67 (8)° with each other. An intramolecular O—H⋯N hydrogen bond helps to stabilize the molecular conformation. Aromatic C—H⋯π interactions and π–π stacking interactions [centroid–centroid distance = 3.6155 (15) Å] between the benzene rings contribute to the stabilization of the crystal structure.
The title compound, C13H9Cl3N2, was obtained from a condensation reaction of benzaldehyde and 2,4,6-trichlorophenylhydrazine. The molecule assumes an E configuration with the phenyl ring and trichlorophenyl ring located on opposite sides of the C=N bond. The phenyl ring is oriented at a dihedral angle of 42.58 (12)° with respect to the tricholorophenyl ring. In the crystal, the molecules are linked via N—H⋯N hydrogen bonds, forming supramolecular chains running along the c axis. π–π stacking is present between parallel trichlorophenyl rings of adjacent molecules, the face-to-face and centroid–centroid distances being 3.369 (14) and 3.724 (2) Å, respectively.
The title compound, C15H13ClN2O2, adopts an E conformation with respect to the azomethine C=N bond. The aniline and phenol rings are almost coplanar, making a dihedral angle of 3.33 (2)°. In the crystal, the molecules lie about inversion centers, forming dimers that are connected by intermolecular O—H⋯N hydrogen bonds, resulting in six-membered rings with graph-set motif R
2(6). In addition, there is a strong intermolecular O—H⋯N hydrogen-bonding interaction, resulting in an S(6) ring motif. Weak π–π interactions between the benzene rings [centroid–centroid distance = 3.809 (1) Å] further stabilize the crystal structure.
The molecule of the title compound, C16H16N2O4, exists in the E configuration with respect to the central C=N double bond. The dihedral angle between the two benzene rings is 2.17 (9) Å. In the crystal, molecules are linked via O—H⋯N hydrogen bonds into chains that propagate along the b-axis direction. There is also π–π stacking of inversion-related molecules, with interplanar spacings of 3.479 (5) Å and ring centroid–centroid distances of 3.876 (4) Å.
The title compound, C13H8BrCl2NO, was obtained by reaction of 3-bromo-5-chlorosalicylaldehyde and 2-chlorobenzenamine in methanol. The molecule displays an E configuration with respect to the imine C=N double bond. The dihedral angle between the two benzene rings is 4.57 (11)°. The molecular conformation is stabilized by an intramolecular O—H⋯N hydrogen bond. In the crystal structure, molecules are linked by intermolecular C—H⋯O hydrogen-bonding interactions into zigzag chains running parallel to the b axis. Intermolecular Br⋯Cl [3.5289 (11) Å] and Cl⋯Cl [3.5042 (12) Å] interactions are present.
The crystal structure of the title compound, C14H12N2O4, contains four crystallographically independent molecules in the asymmetric unit. All the molecules have similar conformations; the dihedral angles between the aromatic rings are 33.1 (1), 33.76 (9), 31.41 (9) and 32.56 (10)°. Intramolecular O—H⋯N hydrogen bonds form S(6) ring motifs in each molecule. In the crystal, there are two pairs of pseudo-inversion-related molecules. Along the c axis, molecules are stacked with π–π interactions between the 2-hydroxyphenyl and 4-methoxy-2-nitrophenyl rings [centroid–centroid distances = 3.5441 (12)–3.7698 (12) Å].
The molecule of the title compound, C17H21N3O, displays a trans configuration with respect to the C=N double bond. The dihedral angle between the planes of the two benzene rings is 50.96 (11)° and a strong intramolecular O—H⋯N hydrogen bond is present. An intermolecular N—H⋯O hydrogen-bonding interaction stabilizes the crystal structure.
The asymmetric unit of title compound, C19H22INO, contains two independent molecules. Classical intramolecular O—H⋯N hydrogen bonds stabilize the molecular structures. The crystal structure is stabilized by weak intermolecular C—H⋯π and π–π [centroid–centroid = 3.8622 (18) Å] interactions. In both molecules, the aromatic rings are nearly perpendicular to each other [dihedral angles = 84.26 (17) and 86.69 (15)°].
The title compound, C14H9ClF3NO2, crystallizes in a phenol–imine tautomeric form, with a strong intramolecular O—H⋯N hydrogen bond. The dihedral angle between the two benzene rings is 47.62 (9)°. In the crystal, molecules are linked into chains along the c axis by C—H⋯O hydrogen bonds, and weak C—H⋯π interactions involving both benzene rings are also observed.
The asymmetric unit of the title compound, C13H8ClI2NO, contains half of the molecule situated on a mirror plane. The hydroxy group is involved in the formation of an intramolecular O—H⋯N hydrogen bond. π–π interactions between the benzene rings of neighbouring molecules [centroid–centroid distance = 3.629 (3) Å] form stacks along the b axis. In the crystal, weak C—H⋯O and C—H⋯Cl interactions are observed.
The title compound, C15H15NO2, adopts the enol–imine tautomeric form. The dihedral angle between the two benzene rings is 48.1 (1)°. Intramolecular O—H⋯N and O—H⋯O hydrogen bonds generate S(6) and S(5) ring motifs, respectively. In the crystal, molecules are linked into centrosymmetric R
2(10) dimers via pairs of O—H⋯O hydrogen bonds and the dimers may interact through very weak by π–π interactions [centroid–centroid distance = 4.150 (1) Å]. The ethyl group is disordered over two orientations, with occupancies of 0.587 (11) and 0.413 (11).
The title compound, C17H19NO2, exists as an enol–imine tautomer. The dihedral angle between the two benzene rings is 4.6 (2)°. The molecular structure is stabilized by intramolecular O—H⋯O and O—H⋯N hydrogen bonds which generate S(5) and S(6) ring motifs, respectively. In the crystal, molecules are linked into centrosymmetric dimers by pairs of O—H⋯O hydrogen bonds. In addition, C—H⋯π interactions involving both benzene rings are observed.
The title Schiff base, C19H24N2O3, exists in the crystal structure in the phenol–imine tautomeric form with an intramolecular O—H⋯N hydrogen bond. The planes of the aromatic rings form a dihedral angle of 36.8 (8)°. The crystal packing is characterized by C—H⋯O hydrogen bonds and π–π stacking interactions [centroid–centroid distance = 3.478 (4)Å].
The title anilide–imine compound, C24H26N2O, features an intramolecular N—H⋯N hydrogen bond involving the imine and anilide groups to generate an S(6) ring motif. The molecule displays an E configuration about the imine C=N double bond, with the dihedral angle between the two benzene rings being 86.5°. The packing is stabilized by three different C—H⋯π interactions.
The title compound, C14H12INO, adopts the phenol–imine tautomeric form. The dihedral angle between the aromatic rings is 20.6 (3)°. The molecular conformation is stabilized by an intramolecular O—H⋯N hydrogen bond while in the crystal, weak intermolecular C—H⋯O hydrogen bonds link the molecules into a zigzag chain parallel to the b axis.
In the title compound, C14H11BrN2O2, the mean planes of the two benzene rings are almost parallel to each other, making a dihedral angle of 4.09 (1)°. An intramolecular O—H⋯N hydrogen bond occurs. In the crystal, intermolecular O—H⋯N and C—H⋯O hydrogen bonds link the molecules into a chain-like supramolecular structure.
There are two independent molecules in the asymmetric unit of the title compound, C15H14BrNO3, with very similar geometrical parameters. Each molecule adopts the phenol–imine tautomeric form, with strong intramolecular O—H⋯N hydrogen bonds. The two molecules are non-planar, the dihedral angles between the two aromatic rings being are 24.6 (2) and 30.30 (13)°.
The title compound, C17H12BrNO, exists in an enol–imine form and the molecular structure features an intramolecular O—H⋯N hydrogen bond. The dihedral angle between the benzene ring and the naphthalene ring system is 17.27 (15)°.
In the title molecule, C12H12N2O3, the benzene and isoxazole rings form a dihedral angle of 5.9 (6)°. The hydroxy group is involved in an intramolecular O—H⋯N hydrogen bond [O⋯N = 2.616 (5) Å], resulting in approximate planarity of the molecular skeleton. In the crystal structure, molecules related by translation along the c axis are stacked into columns, the shortest intermolecular C⋯C distance being 3.298 (6) Å.
The title Schiff base compound, C16H14N2O2, has been synthesized by the reaction of 5-amino-3,4-dimethylisoxazole and 2-hydroxy-1-naphthaldehyde. The dihedral angle between the isoxazole ring and the napthyl ring system is 3.29 (7)°. The molecule adopts an E configuration about the central C=N double bond. Intramolecular O—H⋯N hydrogen bonding generates an S(6) ring motif. In the crystal structure, π–π interactions are observed involving the isoxazole ring and the substituted benzene ring of the naphthyl unit, with centroid–centroid distances of 3.5200 (10) Å.
In the title compound, C15H14BrNO, the dihedral angle between the two benzene rings is 43.99 (2)°. The molecular conformation is influenced by an intramolecular O—H⋯N hydrogen bond.
In the title compound, [Cu(C12H9N2O)2], the CuII atom lies on a crystallographic inversion center and has a nearly square-planar geometry. The CuII center coordinates to the phenolic O and azomethine N atoms of the two symmetry-related 2-[(2-pyridyl)iminomethyl]phenolate ligands. The pyridyl N atoms do not coordinate to the CuII atom but participate in intramolecular C—H⋯N hydrogen bonding. π–π stacking between the benzene rings and between the pyridyl rings [centroid–centroid distances 3.8142 (5) and 3.8142 (5) Å, respectively] links the molecules into a chain propagating parallel to .
In the title molecule, C17H16N2O3S, the benzothiazole fragment and the benzene ring form a dihedral angle of 13.8 (4)°, and an intramolecular O—H⋯N hydrogen bond occurs. In the crystal structure, pairs of weak intermolecular O—H⋯S and C—H⋯(O,O) hydrogen bonds link molecules into centrosymmetric dimers. These dimers are related by translation along the a axis and form stacks via π–π interactions, with a short intermolecular distance of 3.766 (5) Å between the centroids of the benzene and thiazole rings.
The title compound, C15H15NO3, adopts the enol–imine tautomeric form. The two rings are twisted with respect to each other, making a dihedral angle of 44.08 (5)°. The 3-methoxy-2-[(E)-(4-methoxyphenyl)-iminomethyl]phenol unit is almost planar, the largest deviation from the mean plane being 0.047 (2) Å. Such a planar conformation might be related to the occurrence of an intramolecular O—H⋯N hydrogen bond. In the crystal, intermolecular C—H⋯O hydrogen bonds link the molecules into sheets parallel to (010). These sheets are interconnected by weak C—H⋯π interactions.