Rei Sakamoto

1,8-Dibenzoyl-naph-tha-lene-2,7-diyl dibenzoate.

In the title compound, C38H24O6, the phenyl rings of the benzoyl and benzoyloxy groups make dihedral angles of 67.12 (5), 85.15 (5), 76.41 (5) and 71.47 (5)° with the naphthalene ring system. In the crystal, C—H⋯O hydrogen bonds link molecules into chains parallel to the b axis. The structure also features C—H⋯π and π–π stacking interactions, with centroid–centroid distances in the range 3.6441 (7)–3.9197 (8) Å.

[2,7-Dimeth-oxy-8-(4-propyl-benzo-yl)naphthalen-1-yl](4-propyl-phen-yl)methanone.

In the title compound, C32H32O4, the 4-propylbenzoyl groups at the 1- and 8-positions of the naphthalene ring system are aligned almost antiparallel, and their benzene rings make a dihedral angle of 8.64 (10)°. The dihedral angles between the naphthalene ring system and the benzene rings are 69.37 (8) and 69.45 (8)°. In the crystal, C—H⋯O interactions link adjacent molecules via their aroyl groups.

[2,7-Dimeth­oxy-8-(4-meth­oxy­benzo­yl)naphthalen-1-yl](4-meth­oxy­phen­yl)methanone chloro­form monosolvate

In the title compound, C28H24O6·CHCl3, the two 4-methoxybenzoyl groups at the 1- and 8-positions of the naphthalene ring system are aligned almost antiparallel, the benzene rings making a dihedral angle of 25.76 (7)°. The naphthalene ring system makes dihedral angles of 72.51 (7) and 73.33 (7)° with the benzene rings. In the crystal, the naphthalene molecules are linked by C—H⋯O interactions, forming a helical chain along the b-axis direction. A C—H⋯Cl interaction is also observed between the aroylated naphthalene and chloroform molecules. The chloroform molecule is disordered over two positions with site occupancies of 0.478 (5) and 0.522 (5).

(2,7-Dimethoxynaphthalen-1-yl)(4-methoxyphenyl)methanone

In the molecule of the title compound, C20H18O4, the dihedral angle between the naphthalene ring system and the benzene ring is 81.74 (5)°. An intermolecular C—H⋯O interaction is formed between an H atom at the 6-position of the naphthalene ring and the O atom of the methoxy group at the 7-position.

1-Benzoyl­naphthalene-2,7-diyl dibenzoate

In the title compound, C31H20O5, the phenyl rings of the benzoyloxy and benzoyl groups are twisted away from the naphthalene ring system by 64.27 (6), 73.62 (5) and 80.41 (6)°. In the crystal, C—H⋯O hydrogen bonds and C—H⋯π interactions link the molecules, forming tubular chains parallel to the b axis. The chains are further connected into a three-dimensional network by C—H⋯π interactions and π–π stacking contacts [centroid–centroid distances = 3.622 (10)–3.866 (12) Å].

{2,7-Dimeth­oxy-8-[4-(2-methyl­prop­yl)benzo­yl]naphthalen-1-yl}[4-(2-methyl­prop­yl)phen­yl]methanone

In the molecule of the title compound, C34H36O4, the two 4-isobutylbenzoyl groups at the 1- and 8-positions of the naphthalene ring system are aligned almost antiparallel, and the benzene rings make a dihedral angle of 21.59 (7)°. The dihedral angles between the benzene rings and the naphthalene ring system are 69.26 (6) and 64.29 (5)°. There are no classical hydrogen bonds in the structure, but inversion-related molecules engage in π–π stacking, with an interplanar spacing between related naphthalene groups of 3.4120 (16) Å.

Bis(1-benzoyl-7-meth­oxy­naphthalen-2-yl) terephthalate

The title molecule, C44H30O8, lies about a crystallographic inversion centre located at the centre of the central benzene ring. The benzene rings in the benzoyl and the terephthalate units make dihedral angles of 67.05 (7)° and 57.57 (7)°, respectively, with the naphthalene ring system. There is an intramolecular C—H⋯O interaction between the ketonic carbonyl O atom and an H atom on the naphthalene ring system. In the crystal, C—H⋯O interaction of the benzene ring in the benzoyl group and weak C=O⋯π interaction [O⋯centroid = 3.375 (2) Å] of the naphthalene ring with the O atom in the ketonic carbonyl group are observed. These interactions form layers parallel to the bc plane.

(4-Eth­oxy­benzo­yl)[8-(4-eth­oxy­benzo­yl)-2,7-di­meth­oxy­naphthalen-1-yl]methanone

The title molecule, C30H28O6, possesses crystallographically imposed twofold symmetry, with two central C atoms in the naphthalene unit lying on the rotation axis along [001]. The 4-ethoxybenzoyl groups at the peri positions of the naphthalene ring system are disordered over two sets of sites with occupancies of 0.769 (4) and 0.231 (4). They are directed in opposite directions from the naphthalene plane (anti orientation). For the major component, the dihedral angle between the aroyl benzene ring and the naphthalene ring system is 75.62 (13)° [minor component 75.5 (4)°], and that between the aroyl benzene rings is 32.58 (15)°. In the crystal, molecules are linked via C—H⋯O and C—H⋯π interactions, forming a three-dimensional network.

1,8-Bis(4-fluoro­benzo­yl)naphthalen-2,7-diyl dimethane­sulfonate

The molecule of the title compound, C26H18F2O8S2, lies across a crystallographic twofold rotation axis. The benzene rings of the 4-fluorobenzoyl groups make dihedral angles of 78.93 (12)° with the naphthalene ring system. An intramolecular C—H⋯π interaction occurs. In the crystal, a number of C—H⋯O interactions link the molecules, forming a three-dimensional structure.

(8-Benzoyl-2,7-dimeth­oxy­naphthalen-1-yl)(4-phen­oxy­phen­yl)methanone

In the molecule of the title compound, C32H24O5, the benzoyl group and the 4-phenoxy substituted benzoyl group at the 1- and 8-positions of the naphthalene ring system are aligned almost antiparallel. The two benzene rings make a dihedral angle of 21.18 (10)°, and are inclined to the naphthalene ring system by 86.53 (9) and 82.95 (8)°, respectively. In the crystal, C—H⋯O interactions are observed involving aromatic and methoxy H atoms with ketonic carbonyl O atoms, as well as C—H⋯π interactions between aromatic H atoms and the π-systems of naphthalene and benzene rings. These interactions form a three-dimensional architecture and afford a waved alignment of the naphthalene ring systems along the c axis.