organic compounds
Open access
In the title compound, C36H28O4, the 1-naphthoyl groups at the 1- and 8-positions of the central 2,7-diethoxynaphthalene ring system are aligned almost antiparallel and make a dihedral angle of 76.59 (4)°. The dihedral angles between the central 2,7-diethoxynaphthalene ring system and the terminal naphthalene ring systems are 86.48 (4) and 83.97 (4)°. In the crystal, C—Hπ interactions between the central naphthalene ring systems and the naphthoyl groups are observed along the a axis, with the molecules forming a columnar structure. The columns are linked into chains parallel to the b axis by C—HO interactions.
organic compounds
Open access
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—Hπ interaction occurs. In the crystal, a number of C—HO interactions link the molecules, forming a three-dimensional structure.
organic compounds
Open access
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—HO interaction between the ketonic carbonyl O atom and an H atom on the naphthalene ring system. In the crystal, C—HO interaction of the benzene ring in the benzoyl group and weak C=Oπ interaction [Ocentroid = 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.