Research Article: Bis(2-amino­pyridinium) 2,5-dicarb­oxy­benzene-1,4-dicarboxyl­ate

Date Published: May 01, 2012

Publisher: International Union of Crystallography

Author(s): V. H. Rodrigues, Mohammad Hakimi, Elham Motieiyan.


In the title compound, 2C5H7N2+·C10H4O82−, the 2-amino­pyridinium (2-apyH) cation and 2,5-dicarb­oxy­benzene-1,4-dicarboxyl­ate (btcH2) anion are both nearly planar, with r.m.s. deviations of 0.015 and 0.050 Å, respectively. The angle between the latter least-squares planes is 17.68 (9)°. The overall crystal structure results from the packing of two-dimensional networks, formed by alternating 2-apyH and btcH2 linked by hydrogen bonds, parallel to (100).

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For similar and most common conformations of 2-amino­pyridinium, see: Guelmami & Jouini (2011 ▶); Chitra et al. (2008 ▶); Quah et al. (2008 ▶); Bis & Zaworotko (2005 ▶); Büyükgüngör & Odabas˛ogˇlu (2002 ▶); Odabas˛ogˇlu et al. (2003 ▶); Acheson (1967 ▶). For similar and most common conformations of 2,5-dicarb­oxy­benzene-1,4-dicarboxyl­ate, see: Dong et al. (2011 ▶); Wang & Tang (2010 ▶). For graph-set analysis of hydrogen-bond patterns in organic crystals, see: Etter et al. (1990 ▶).