Crystal structure of 7,15-bis­­(4-tert-butyl­phen­yl)-1,9-di­methyl­hepta­zethrene

The title compound, C50H44, 1, was synthesized as a derivative of hepta­zethrene bearing two methyl and two tert-butyl­phenyl substituents, respectively, at the 1,9- and 7,15-positions. The asymmetric unit consists of one half of the mol­ecule, which lies about an inversion centre. Albeit remotely located, the substituents contort the hepta­zethrene plane. The tert-butyl­phenyl substituents stand approximately perpendicular to the core plane, with a dihedral angle of 79.09 (5)° between the phenalene ring system and the substituted benzene ring, and prevent direct inter­molecular contacts of the hepta­zethrene cores.