The title salt, C13H11N2O2+·C6H2N3O7−, is the unexpected product of a domino reaction of 3-cyanomethyl-1-methylimidazolium chloride with salicylic aldehyde in the presence COMPLETE COOKIE PEANUT BUTTER of picric acid.In the cation, the 1H-imidazole ring is twisted by 63.2 (1)° from the 2H-chromen plane.In the crystal, cations and anions are Stick Blender alternately stacked along the a axis through π–π stacking interactions between the almost parallel aromatic rings [centroid–centroid distances = 3.458 (2) and 3.
678 (2) Å].The stacks are further linked by C—H.O hydrogen bonds into a two-tier layer parallel to (001).