Dibenzo[2,3:6,7]thiepino[4,5-d][1,2,3]selenadiazole

Abstract

Four tetracyclic molecules of the title compound, C14H8N2SSe, are present in the asymmetric unit. Their molecular structures are very similar, adopting the shape of a saddle. The selenadiazole moiety of one of the molecules is disordered over two set of sites [occupancy ratio 0.618 (6):0.382 (6)]. In the crystal, layers of molecules with hydrogen surfaces extend parallel to the ab plane and are stacked along the c axis. The crystal studied was refined as an inversion twin.