Publication: Bis(2-Aminopyridinium) Maleate
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Abstract
Two cyclic eight-membered hydrogen-bonded rings exist in the title compound, 2C<inf>5</inf>H<inf>7</inf>N<inf>2</inf>+·C<inf>4</inf>H<inf>2 </inf>O<inf>4</inf>2-, involving the 2-aminopyridinium and maleate ions. The dihedral angle between the two pyridinium rings hydrogen bonded to the maleate ion is 74.80 (4)°. The maleate anion lies on a twofold axis and is linked to the pyridinium cations by intermolecular N-H⋯O hydrogen bonds. The heterocycle is fully protonated, which enables amino-imino tautomerization.
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Acta Crystallographica Section C: Crystal Structure Communications
Volume
59
Issue
3
Start Page
o105
End Page
o106