Comparative structural analysis of 2,7-dieth­oxy-1,8-bis­(4-phen­oxy­benz­oyl)naphthalene and its homologues: orientation of the 4-phen­oxy­benzoyl groups at the 1- and 8-positions of the naphthalene ring

The title compound is analysed for comparison with the crystal structures of two homologues which have varying alk­oxy groups at the 2- and 7-positions of the naphthalene ring. Naphthalene analogues bearing 4-phen­oxy­benzoyl groups at the 1- and 8-positions of the naphthalene ring normally show C₂ symmetry affording anti conformers, but the formation of effective C—H...π inter­actions between 4-phen­oxy­benzoyl groups induces adoption of the syn conformer.