title: 4-Carbamoylpyridin-1-ium 2,2,2-trichloro-acetate.
abstract: In the asymmetric unit of the title salt, C(6)H(7)N(2)O(+)·C(2)Cl(3)O(2) (-), there are two crystallographic independent ion pairs. The amide groups of the 4-carbamoylpyridin-1-ium ions are slightly twisted out of the plane of the aromatic ring with C-C-C-N torsion angles of 8.8 (9)° and 4.6 (8)°. In the crystal, the 4-carbamoylpyridin-1-ium ion is N-H⋯O hydrogen bonded to the trichloro-acetate ion via the pyridinium unit and amide group. Layers parallel to the ac plane are formed due to the N-H⋯O hydrogen bonding of the adjacent amide groups of 4-carbamoylpyridin-1-ium ions. Weak C-H⋯O inter-actions also occur.
authors.affiliation: Faculty of Chemistry and Chemical Technology, University of Ljubljana, Aškerčeva 5, P. O. Box 537, SI-1000 Ljubljana, Slovenia, and CO EN-FIST, Dunajska 156, SI-1000 Ljubljana,  Slovenia.
authors.forename: Franc
authors.initials: F
authors.lastname: Perdih