Acta Crystallographica Section E

Structure Reports Online

Volume 68, Part 11 (November 2012)


organic compounds



is5197 scheme

Acta Cryst. (2012). E68, o3151-o3152    [ doi:10.1107/S1600536812041359 ]

2-Amino-5-methylpyridinium 6-oxo-1,6-dihydropyridine-2-carboxylate

K. Thanigaimani, A. Farhadikoutenaei, N. C. Khalib, S. Arshad and I. A. Razak

Abstract: The anion of the title salt, C6H9N2+·C6H4NO3-, undergoes an enol-to-keto tautomerism during the crystallization. In the crystal structure, the cation and anion are held together by a relatively short N-H...O hydrogen bond, and the two anions are further connected to each other by a pair of N-H...O hydrogen bonds with an R22(8) ring motif, thus forming a centrosymmetric 2 + 2 aggregate. The aggregates are further linked through weak N-H...O and C-H...O hydrogen bonds, resulting a three-dimensional network.


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