7-Methoxy-1-{[(Z)-3-nitrophenylimino](phenyl)methyl}-2-naphthol

In the title compound, C24H18N2O4, the phenyl and benzene rings are both oriented almost perpendicular to the naphthalene ring system at dihedral angles of 70.97 (5) and 84.64 (5)°. The former rings make a dihedral angle of 87.15 (6)°. The mol­ecule has a Z configuration about the C=N bond. In the crystal, mol­ecules are connected by a pair of inter­molecular O—H⋯O hydrogen bonds between the hy­droxy and the nitro group, forming centrosymmetric dimers. Inter­molecular C—H⋯O inter­actions also occur

Crystal structure of 7-methoxy-1-{[(E)-2,6-dimethylphenylimino] (phenyl)methyl}-2-naphthol: Clarification of non-covalent bonding interactions on the basis of spatial organization of single molecular structure and the molecular alignments

Crystal structure of the title compound, 7-methoxy-1-{[(E)-2,6-dimethylphenylimino] (phenyl)methyl}-2-naphthol, which has N-aryl group instead of ketonic carbonyl group has been comparatively analysed with the precursor compound of 1-benzoyl-2-hydroxy-7-methoxynaphthalene. The distinct features in the molecular accumulation structures of title triarylimine compound and the precursor diaryl ketone demonstrate that the spatial organization of the former is mainly determined π-π stacking interaction and for the latter the non-classical hydrogen bondings govern the spatial organization. Besides both of the compounds show non-coplanaryl accumulation of aromatic rings molecular structure, the title compound has molecular core of imino group which attaches three aromatic rings of C-1-naphthyl, C-phenyl, and N-phenyl stems of nearly perpendicular alignment of each aryl groups to residual two aryl ones respectively, giving highly congested circumstance at the inner site of molecules. On the other hand, the precursor aromatic ketone molecule has relatively large space compared to title compound, enabling conformational flexibility to some extent within restriction of maintaining non-coplanar organization. The molecules of the precursor compound in crystal are stabilized by a number of non-covalent bonding interactions, mainly by non-classical hydrogen bondings. The achievement stabilization contributed a number of non-classical hydrogen bonding is considered to be due to the inner-molecular motility of single molecular structure. Contrarily, the congested inner-molecular situation of title compound makes largely rigid molecular conformation, which affords at the same time exposure of three aromatic planes outside the molecular core. The single molecular organization permits π-π stacking interaction stabilization instead of formation of a number of weak interactions. Thus, the governing factors for the distinct feature of the single molecular and the accumulation structures of title compound and the precursor are interpreted from the viewpoint of predominantly effective intermolecular interaction, a strong π-π stacking interaction or sum of weak non-classical hydrogen bondings, determined by the inner-molecular congestive conditions directly affects the inner-molecular motility

(2,7-Dimeth­oxy­naphthalen-1-yl)(3-nitro­phen­yl)methanone

The title compound, C19H15NO5, has an intra­molecular C—H⋯O=C hydrogen bond between a naphthalene H atom and the O atom of the carbonyl group. The inter­planar angle between the naphthalene ring system and the benzene ring is 69.59 (5)°. The dihedral angle between the bridging carbonyl C—C(=O)—C plane and the naphthalene ring system is 61.02 (6)°, which is far larger than that between the bridging carbonyl plane and the benzene ring [12.68 (7)°]. The nitro group is slightly out of the plane of the benzene ring [O—N—C—C torsion angle = 4.97 (17)°]. In the crystal, the packing is mainly stabilized by C—H⋯O inter­actions between an H atom of the benzene ring and an O atom of the nitro group

(2-Hy­droxy-7-meth­oxy­naphthalen-1-yl)(phen­yl)methanone

In the mol­ecule of the title compound, C18H14O3, there is an intra­molecular O—H⋯O=C hydrogen bond between the carbonyl and hy­droxy groups on the naphthalene ring system. The angles between the C=O bond vector and the least-squares planes of the naphthalene ring system and the phenyl ring are 30.58 (6) and 42.82 (7)°, respectively, while the dihedral angle between the naphthalene ring system and the phenyl ring is 58.65 (5)°. In the crystal, mol­ecules are connected by pairs of inter­molecular O—H⋯O=C hydrogen bonds, forming centrosymmetric dimers

1-[(4-Chloro­phen­yl)(phenyl­imino)­meth­yl]-7-meth­oxy-2-naphthol–1,4-diaza­bicyclo­[2.2.2]octane (2/1)

In the crystal structure of the title cocrystal, 2C24H18ClNO2·C6H12N2, the 1,4-diaza­bicyclo­[2.2.2]octane mol­ecule is located on a twofold rotation axis and linked to the two triaryl­imine mol­ecules by O—H⋯N hydrogen bonds, forming a 2:1 aggregate. C—H⋯Cl inter­actions are also observed. In the triaryl­imine mol­ecule, the naphthalene ring system makes dihedral angles of 80.39 (6) and 82.35 (6)°, respectively, with the phenyl and benzene rings. The dihedral angle between these two latter rings is 87.09 (7)°

(4-Bromo­phen­yl)(3,6-dimeth­oxy-2-naphth­yl)methanone

In the title compound, C19H15BrO3, the dihedral angle between the naphthalene ring system and the benzene ring is 62.51 (8)°. The bridging carbonyl C—C(=O)—C plane makes dihedral angles of 47.07 (6)° with the naphthalene ring system and 24.20 (10)° with the benzene ring. A weak inter­molecular C—H⋯O hydrogen bond exists between the H atom of one meth­oxy group and the O atom of the other meth­oxy group in an adjacent mol­ecule. The crystal packing is additionally stabilized by two types of weak inter­molecular inter­actions involving the Br atom, C—H⋯Br and Br⋯O [3.2802 (14) Å]

(5-Benzoyl-3,6-dimeth­oxy­naphthalen-2-yl)(phen­yl)methanone

The asymmetric unit of the title compound, C26H20O4, contains two independent conformers. The aromatic rings of the aroyl groups are twisted with respect to the naphthalene ring systems to form dihedral angles of 66.58 (6) and 66.45 (6)° in one conformer, and 75.00 (7) and 81.17 (6)° in the other conformer. The crystal packing is stabilized by weak inter­molecular C—H⋯O hydrogen bonds and by C—H⋯π inter­actions

(2,7-Dimethoxy­naphthalene-1,8-di­yl)bis­(4-fluoro­benzo­yl)dimethanone

The title compound, C26H18F2O4, is a naphthalene derivative in which the two aroyl groups at the 1- and 8-positions (peri positions) are anti to each other. There is an appreciable difference in the dihedral angles between the naphthalene ring system and the two benzene rings [66.88 (7)° and 88.09 (6)°]. In the crystal, weak C—H⋯O inter­actions involving one of the carbonyl groups and an aromatic C—H group ortho to the F atom seem to stabilize the packing of the mol­ecules

2,7-Dimeth­oxy-1,8-bis­(4-phen­oxy­benzo­yl)naphthalene

In the title mol­ecule {systematic name: [2,7-dimethoxy-8-(4-phenoxybenzoyl)naphthalen-1-yl](4-phenoxyphenyl)methan­one}, C38H28O6, the 4-phen­oxy­benzoyl units adopt a syn orientation with respect to the naphthalene ring system. The inter­nal benzene rings, A and B, make dihedral angles of 86.72 (5) and 79.22 (5)° with the naphthalene ring system. The two terminal benzene rings, C and D, of the 4-phen­oxy­benzoyl groups are twisted with respect to benzene rings A and B, with dihedral angles of A/C = 62.72 (8) and B/D = 87.61 (6)°. In the crystal, H atoms in the naphthalene system make two types of inter­molecular C—H⋯O inter­actions with the carbonyl O atom and the phenyl etheral O atom of neighbouring mol­ecules. Mol­ecules are further linked by C—H⋯π inter­actions involving a H atom of terminal benzene ring D and the π-system of the inter­nal benzene ring A, forming dimers centered about an inversion center