Acta Cryst. (2007). E63, o2933  [ doi:10.1107/S1600536807022866 ]

2-[5-(2,2-Dimethylpropanamido)-1H-pyrazol-3-yl]pyridinium chloride

C. M. Pask, C. A. Kilner and M. A. Halcrow

Abstract: The title compound, C₁₃H₁₇N₄O⁺·Cl^-, contains a cation protonated at its pyridine ring N atom. Pyridinium and amide NH groups (from two different cations) form hydrogen bonds with the Cl^- ion, together with three weaker C-HCl interactions. The pyrazole rings of the cations associate into cyclic dimers through N-HN hydrogen bonding. The N-HN and N-HCl interactions combine to associate the cations and anions into alternating chains along the [101] vector, generated by crystallographic inversion centres. These chains are then further aggregated by a C-HCl interaction into two-dimensional layers parallel to (010).

Online 23 May 2007

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