5,5′-Bis(naphthalen-2-yl)-2,2′-bi(1,3,4-oxadiazole)

The title molecule, C24H14N4O2, lies on an inversion centre and the asymmetric unit containg one half-molecule. The naphthalene ring systems are twisted slightly with respect to the oxadiazole rings, making a dihedral angle of 1.36 (6)degrees. These molecules are pi-stacked along the crystallographic a axis, with an interplanar distance of 3.337 (1) angstrom. Adjacent molecules are slipped from the 'ideal' cofacial pi-stack in both the long and short molecular axis (the long molecular axis is defined as the line through the naphthalene C atom in the 6-position and the molecular center, the short molecular axis is in the molecular plane perpendicular to it). The slip distance along the long molecular axis (S-1) is 7.064 (1) angstrom, nearly a two-ring-length displacement. The side slip (S-2, along the short molecular axis) is 1.159 (8) angstrom.