1-Methyl-3-(2-oxo-2H-chromen-3-yl)-1H-imidazol-3-ium picrate

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 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 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).

(E)-1,5-Di­phenyl­pent-2-en-4-yn-1-one

The title compound, C₁₇H₁₂O, has an E conformation about the C=C bond. The C—C[triple bond]C—C torsion angle is 7.7 (2)°, and the mean planes of the phenyl­ethyl­enone [r.m.s. deviation = 0.059 (1) Å] and phenyl­acetyl­ene [r.m.s. deviation = 0.023 (1) Å] fragments form a dihedral angle of 14.16 (7)°. In the crystal, weak C—H...O inter­actions link the mol­ecules into zigzag chains propagated in [010].