The molecule of the title compound, C34H36O6, is located on a twofold rotation axis. The two 4-butoxybenzoyl groups at the 1- and 8-positions of the naphthalene ring system are aligned almost antiparallel. The dihedral angles between the benzene rings and the naphthalene ring system are 71.70 (4)°. In the crystal, the molecules are connected via C—H⋯π interactions into a layer parallel to (010).
In the title compound, C32H32O4, the dihedral angle between the two benzene rings of the 2,4,6-trimethylbenzoyl groups is 71.43 (7)°. The dihedral angles between the two benzene rings and the naphthalene ring system are 81.58 (5) and 84.92 (6)°. An intramolecular C—H⋯O interaction is observed.
Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.004 Å; R factor = 0.038; wR factor = 0.103; data-to-parameter ratio = 14.5.In the title compound, C 26 H 18 Br 2 O 4 , the two 4-bromobenzoyl groups at the 1-and 8-positions of the naphthalene ring system are anti to each other. The dihedral angle between the two benzene rings is 50.92 (14) . The dihedral angles between the two benzene rings and the naphthalene ring system are 70.18 (11) and 74.98 (12) . A weak intermolecular C-HÁ Á ÁO hydrogen bond exists between the methyl group and the carbonyl O atom.
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In the title compound, C19H15FO3, the dihedral angle between the naphthalene ring system and the benzene ring is 62.93 (5)°. The bridging carbonyl C—C(=O)—C plane makes dihedral angles of 45.55 (6) and 28.62 (7)°, respectively, with the naphthalene ring system and the benzene ring. Weak intermolecular C—H⋯O hydrogen bonds and C—H⋯π interactions stabilize the crystal packing.
In the title molecule, C30H28O4, the interplanar angle between the two benzene rings of the 3,5-dimethylbenzoyl groups is 50.35 (7)°. The dihedral angles between the two benzene rings and the naphthalene ring system are 81.87 (6) and 83.55 (6)°. In addition, the conformations of the pairs of methyl groups and their counterparts differ from each other though their environment is very similar. In the crystal, weak C—H⋯O interactions occur.
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