Acta Crystallographica Section E

Structure Reports Online

Volume 68, Part 9 (September 2012)

organic compounds

Acta Cryst. (2012). E68, o2733    [ doi:10.1107/S1600536812035507 ]

4-Carbamoylpyridin-1-ium 2,2,2-trichloro­acetate

F. Perdih

Abstract: In the asymmetric unit of the title salt, C6H7N2O+·C2Cl3O2-, 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 trichloro­acetate 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 inter­actions also occur.

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