| Summary: | In the crystal structure of the title compound, 2C6H4N2·C6H2Cl2O4·2C2H3N, the two symmetry-related pyridine-3-carbonitrile molecules are linked to either side of a chloranilic acid (systematic name: 2,5-dichloro-3,6-dihydroxy-1,4-benzoquinone) molecule via intermolecular O—H...N hydrogen bonds, giving a centrosymmetric 2:1 unit. The dihedral angle between the pyridine ring and the chloranilic acid plane is 26.71 (6)°. In addition, the two acetonitrile molecules are linked to either side of the 2:1 unit through C—H...N hydrogen bonds, forming a 2:1:2 aggregate. These 2:1:2 aggregates are further linked by weak intermolecular C—H...N and C—H...O hydrogen bonds, forming a tape along the c axis.
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