Crystal structure of 2,6-di­benzyl­pyrrolo­[3,4-f]iso­indole-1,3,5,7(2H,6H)-tetra­thione

The title compound, C(24)H(16)N(2)S(4), consists of a central pyromellitic di­imide substituted with an S atom and terminal benzyl groups. The mol­ecule lies on a crystallographic inversion centre so that the asymmetric unit contains half of the mol­ecule. The mol­ecule was prepared by thio­nation of N,N′-di­benzyl­pyromellitic di­imide with Lawesson’s reagent and has an S-shaped conformation similar to other compounds of this type. The phenyl groups are tilted by 72.69 (8)° with respect to the plane of the central arene ring. In the crystal, mol­ecules are connected by C—H⋯π inter­actions and weak short S⋯S contacts, forming supra­molecular layers extending paralled to the ab plane. The crystal studied was found to be non-merohedrally twinned, with the minor component being 0.113 (3).