(8-Bromo-2,7-dimeth­oxy-1-naphth­yl)(4-chloro­phenyl)methanone

In the title compound, C19H14BrClO3, the naphthalene ring system and the benzene ring make a dihedral angle of 77.36 (10)°. The conformation around the central C=O group is such that the C=O bond vector forms a larger angle to the plane of the naphthalene ring system than to the plane of the benzene ring, viz. 75.73 (15)° versus 2.33 (17)°. In the crystal structure, a π–π inter­action is formed between naphthalene ring systems, with a centroid–centroid distance of 3.8363 (14) Å and a lateral offset of 1.606 Å. Inter­molecular C—H⋯Br and C—H⋯O hydrogen bonds and a C—H⋯π contact are present in the crystal structure

(4-Chloro­phen­yl)(3,8-dibromo-2-hydr­oxy-7-meth­oxy-1-naphth­yl)methanone

In the title compound, C18H11Br2ClO3, an intra­molecular O—H⋯O=C hydrogen bond occurs, forming a six-membered ring. The naphthalene ring system and the benzene ring make a dihedral angle of 57.36 (9)°. The central carbonyl C—(C=O)—C group is twisted away from the naphthalene ring system and the benzene ring by 18.61 (15) and 26.25 (16)°, respectively. In the crystal structure, two inter­molecular Br⋯Cl close contacts [3.4927 (7) and 3.4325 (7) Å] are observed

Methyl 4-(2,7-dimeth­oxy-1-naphtho­yl)benzoate

In the title compound, C21H18O5, the dihedral angle between the naphthalene ring system and the benzene ring is 86.65 (6)°. The bridging carbonyl C—C(=O)—C plane makes dihedral angles of 83.57 (7) and 20.21 (8)°, respectively, with the naphthalene ring system and the benzene ring. The ester O—C=O plane and the benzene ring are almost coplanar, making a dihedral angle of 3.81 (18)°. The two meth­oxy groups lie essentially in the naphthalene ring plane [C—O—C—C torsion angles = 2.1 (2) and −1.44 (19)°]. In the crystal structure, a centrosymmetric dimer is formed through C—H⋯O bonds connecting the 7-meth­oxy group and the carbonyl O atom of the ester group. The dimers are further linked by C—H⋯O hydrogen bonds between the methoxy­carbonyl group and the bridging carbonyl O atom

1,8-Bis(4-chloro­benzo­yl)-7-meth­oxy­naphthalen-2-ol ethanol monosolvate

In the title compound, C25H16Cl2O4·C2H6O, the two 4-chloro­benzoyl groups are in syn orientations with respect to the naphthalene ring system and are approximately parallel to each other: the dihedral angle between the benzene rings is 11.43 (16)°. The conformation around each of the carbonyl C—(C=O)—C groups forms a larger angle to the plane of the naphthalene ring system than that to the benzene ring; the angles of the C=O bond vector with the naphthalene ring system and the benzene ring are 55.4 (3) versus 13.5 (3)° and 52.2 (3) versus 17.9 (3)°. An intra­molecular O—H⋯O=C hydrogen bond generates a six-membered ring. In the crystal structure, inter­molecular O—H⋯O hydrogen bonds including the ethanol solvent mol­ecule are observed. A C—H⋯O inter­action also occurs. The ethyl group of the ethanol mol­ecule is disordered over two positions with site occupancies of 0.63 and 0.37. The crystal studied was an inversion twin

(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-Chloro­phen­yl)(2,7-dimeth­oxy-8-nitro­naphthalen-1-yl)methanone

In the title compound, C19H14ClNO5, the aroyl group is attached to the naphthalene ring system with a non-coplanar configuration. The dihedral angle between naphthalene ring system and benzene ring is 70.62 (6)°. The nitro group is oriented in parallel with the adjacent carbonyl plane. The torsion angle of the carbonyl group and naphthalene ring is 54.68 (19)° (C—C—C—O), and that of nitro group and naphthalene ring is 54.26 (18)° (O—N—C—C). In the crystal, π–π inter­actions between naphthalene systems [centroid–centroid distances = 3.5633 (9), 3,5634 (9), and 3.9758(9) Å], C—H⋯O hydrogen bonds, inter­molecular N—O⋯Cl inter­actions [2.9937 (12) Å] and C—H⋯π contacts are observed

2-(2,7-Dimeth­oxy-1-naphtho­yl)benzoic acid

In the title compound, C20H16O5, the dihedral angle between the naphthalene ring system and the benzene ring is 67.43 (5)°. The bridging carbonyl C—C(=O)—C plane makes dihedral angles of 82.64 (6) and 41.79 (7)°, respectively, with the naphthalene ring system and the benzene ring. The dihedral angle between the carb­oxy O—C(=O)—C plane and the benzene ring is 36.38 (7)° and that between the bridging carbonyl C—C(=O)—C plane and the carb­oxy O—C(=O)—C plane is 51.88 (8)°. The crystal structure is stabilized by inter­molecular O—H⋯O and C—H⋯O hydrogen-bonding inter­actions. An intra­molecular C—H⋯O hydrogen bond occurs between a naphthalene H atom and the carbonyl O atom of the carb­oxy group

2,7-Dimethoxy­-1-(4-nitro­benzo­yl)-naphthalene

In the title compound, C19H15NO5, the dihedral angle between the naphthalene ring system and the benzene ring is 61.97 (5)°. The dihedral between the naphthalene ring system and the bridging carbonyl C—C(=O)—C plane is 54.68 (6)°, far larger than that [12.54 (7)°] between the phenyl group and the bridging carbonyl group. The nitro group and the phenyl ring are almost coplanar [O—N—C—C torsion angle = 2.94 (19)°]. In the crystal, mol­ecules are linked by C—H⋯π inter­actions and the phenyl rings are involved in a centrosymmetric π–π inter­action with a perpendicular distance of 3.523 Å and a lateral offset of 1.497 Å. In addition, weak inter­molecular C—H⋯O hydrogen bonds are formed between an H atom of one meth­oxy group and a nearby carbonyl O atom

1-(4-Chloro­benzo­yl)-2,7-dimethoxy­naphthalene

In the title compound, C19H15ClO3, the dihedral angle between the naphthalene ring system and the benzene ring is 72.06 (7)°. The 4-chloro­phenyl group and the carbonyl group are almost coplanar. An inter­molecular C—H⋯O hydrogen bond is formed between an H atom of the 4-chloro­phenyl group and the O atom of one meth­oxy group, forming a zigzag chain along the a axis