Acta Crystallographica Section E

Structure Reports Online

Volume 68, Part 9 (September 2012)


organic compounds



bq2374 scheme

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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