4,4′-[2,2-Dimethyl­propane-1,3-diyl­bis(nitrilo­methyl­idyne)]dibenzonitrile

The title compound, C(21)H(20)N(4), is a bidentate Schiff base ligand. An intra­molecular C—H⋯N hydrogen bond forms a five-membered ring, producing an S(5) ring motif. The cyano and imino [–C(H(2))—N=C–] functional groups are coplanar with the benzene ring in each half of the mol­ecule. The packing of the mol­ecules is controlled by C—H⋯π and π–π inter­actions [centroid-to-centroid distance = 3.6944 (8) Å].