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

The title mol-ecule, C(24)H(14)N(4)O(2), lies on an inversion centre and the asymmetric unit containg one half-mol-ecule. The naphthalene ring systems are twisted slightly with respect to the oxadiazole rings, making a dihedral angle of 1.36 (6)°. These mol-ecules are π-stacked along the crystallographic a axis, with an inter-planar distance of 3.337 (1) Å. Adjacent mol-ecules are slipped from the 'ideal' cofacial π-stack in both the long and short mol-ecular axis (the long mol-ecular axis is defined as the line through the naphthalene C atom in the 6-position and the mol-ecular center, the short mol-ecular axis is in the mol-ecular plane perpendicular to it). The slip distance along the long mol-ecular axis (S(1)) is 7.064 (1) Å, nearly a two-ring-length displacement. The side slip (S(2), along the short mol-ecular axis) is 1.159 (8) Å.