The whole molecule of the title compound, C14H14N4, is generated by twofold rotation symmetry. The twofold axis bisects the central –CH2-CH2– bond and the planes of the pyridine rings are inclined to one another by 65.60 (7)°. In the crystal, there are no significant intermolecular interactions present.
Keywords: crystal structure; pyridinecarbaldehydes; 1,2-diaminopyridine; Schiff base; chelating ligands.