2-Aminopyridinium-fumarate-fumaric acid (2/1/1)

Acta Crystallographica. Section C, Crystal Structure Communications
Orhan BüyükgüngörPeter Lönnecke

Abstract

The title complex, 2C5H7N2+.C4H2O42-.C4H4O4, contains cyclic eight-membered hydrogen-bonded rings involving 2-aminopyridinium and fumarate ions. The fumaric acid molecules and fumarate ions lie on inversion centers and are linked into zigzag chains by O-H...O hydrogen bonds. The dihedral angle between the pyridinium ring and the hydrogen-bonded fumarate ion is 7.60 (4) degrees. The fumarate anion is linked to the pyridinium cations by intermolecular N-H...O hydrogen bonds. The heterocycle is fully protonated, thus enabling amine-imine tautomerization.

Citations

Jan 1, 2010·Acta Crystallographica. Section E, Structure Reports Online·Ching Kheng QuahHoong-Kun Fun
Mar 14, 2012·Acta Crystallographica. Section E, Structure Reports Online·Hakkı Yasin OdabaşoğluMustafa Odabaşoğlu
Jun 22, 2012·Acta Crystallographica. Section E, Structure Reports Online·Farouq F SaidIlia Korobkov
Jan 1, 2010·Acta Crystallographica. Section E, Structure Reports Online·Madhukar Hemamalini, Hoong-Kun Fun
Jan 1, 2010·Acta Crystallographica. Section E, Structure Reports Online·Ching Kheng QuahHoong-Kun Fun
Aug 3, 2013·Acta Crystallographica. Section C, Crystal Structure Communications·Shuichao DongZhigang Pan
Aug 4, 2010·Acta Crystallographica. Section C, Crystal Structure Communications·Jain John, T Balasubramanian
Oct 5, 2016·Acta Crystallographica Section B, Structural Science, Crystal Engineering and Materials·Leonid A Solovyov

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