Remarkable π–π stacking of dipyrido[f,h]quinoxaline‐6,7‐dicarbonitrile in its ethanol solvate

The title compound, C₁₆H₆N₆·C₂H₆O, is an ethanol solvate of an aromatic phenanthroline‐based flat ligand. The latter exhibits a remarkable π–π stacking in the crystal structure, with interplanar distances of 3.27 and 3.40 Å, which directs the columnar organization of the ligands. The ethanol solvent molecule is located in channels between these columns, being hydrogen bonded to one of the N‐atom sites of the phenanthroline fragment.