{2,7-Dieth­oxy-8-[(naphthalen-1-yl)carbon­yl]naph­thalen-1-yl}(naphthalen-1-yl)methanone

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—H...π 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—H...O inter­actions.

(2,7-Di­meth­oxy­naphthalen-1-yl)(naph­thalen-1-yl)methanone

The asymmetric unit of the title compound, C₂₃H₁₈O₃, contains two independent mol­ecules (A and B). Each mol­ecule has essentially the same conformation (r.m.s. deviation of fitted mol­ecules = 0.173 Å) with the aromatic rings twisted in a near perpendicular manner. The dihedral angles between the two naphthalene ring systems are 79.07 (4) and 88.19 (4)° in the two independent mol­ecules. In the crystal, the A mol­ecules are connected by C—H...O inter­actions, forming chains along the b-axis direction. Further C—H...O inter­actions between the H atoms of the meth­oxy group and the O atoms of the carbonyl units link the A and B mol­ecules, forming a three-dimensional network.