4-Carbamoylpyridin-1-ium 2,2,2-tri­chloro­acetate–isonicotinamide (1/1)

In the crystal structure of the title 1:1 co-crystal, C(6)H(7)N(2)O(+)·C(2)Cl(3)O(2) (−)·C(6)H(6)N(2)O, the amide groups of the 4-carbamoylpyridin-1-ium ion and the isonicotinamide mol­ecule are twisted out of the plane of the aromatic ring with C—C—C—N torsion angles of 21.5 (4) and −33.5 (4)°, respectively. The 4-carbamoylpyridin-1-ium and isonicotinamide amide groups form R (2) (2)(8) hydrogen-bonded dimers via N—H⋯O=C inter­actions. The two remaining amide H atoms (i) link dimers via the cation to an isonicotinamide and (ii) from the isonicotinamide to a trichloro­acetate anion. The pyridinium H atom also forms an N—H⋯O hydrogen bond with the trichloro­acetate anion. Due to the extended hydrogen bonding, including C—H⋯O and C—H⋯Cl interactions, all components in the structure aggregate into a three-dimensional supra­molecular framework.