2-(4-Chloro-phen-yl)-5-{3,4-dibut-oxy-5-[5-(4-chloro-phen-yl)-1,3,4-oxadiazol-2-yl]thio-phen-2-yl}-1,3,4-oxadiazole.

In the title compound, C(28)H(26)Cl(2)N(4)O(4)S, the dihedral angles between the two chloro-phenyl rings and the two oxadiazol rings are 10.51†(4)° and 13.55†(3)°, respectively. The thio-phene ring is oriented at dihedral angles of 5.59†(4)°, 8.33†(4)° and 4.41†(4)°, 11.05†(3)°, respectively, with respect to the two oxadiazol and the two chloro-phenyl rings. The intra-molecular C-H⋯O hydrogen bond results in the formation of a five-membered ring. In the crystal structure, π-π contacts between the oxadiazol rings, the chloro-phenyl rings and the chloro-phenyl and oxadiazol rings [centroid-centroid distances = 3.428†(3)†à , 3.750†(3)†à and 3.768†(3)†à , respectively] are present.