4-Carbamoylpyridin-1-ium 2,2,2-trichloro-acetate

Acta Crystallogr Sect E Struct Rep Online. 2012 Sep 1;68(Pt 9):o2733. doi: 10.1107/S1600536812035507. Epub 2012 Aug 23.

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.