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Acta Cryst. (2009). E65, m123 [ doi:10.1107/S1600536808043018 ]
Abstract: The title compound, (C5H6N3O2)2[Cr2O7], consists of 2-amino-3-nitropyridinium cations and discrete dichromate anions linked together by N-H
O and C-HO hydrogen bonds, forming thick layers parallel to (101). Layer cohesion is ensured by N-HO hydrogen bonding in addition to electrostatic and van der Waals interactions, forming a three-dimensional framework. The dichromate anion is located on a twofold axis that passes through its bridging O atom.
Online 20 December 2008
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