organic compounds
Open access
In the title co-crystal, C16H14N4O2·2C7H6O2, the 3,4-bis[(pyridin-3-ylmethyl)amino]cyclobut-3-ene-1,2-dione squareamide molecules assemble into chains along the b axis via N—HO hydrogen bonds. The benzoic acid molecules then hydrogen bond to the pyridine rings via O—HN hydrogen bonds, supported by weaker C—HO hydrogen bonds, forming extended ribbons. The asymmetric unit consists of a half squareamide molecule, sitting on a special position around a twofold axis, and one benzoic acid molecule on a general position.