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Acta Cryst. (2013). C69, 896-900  [ doi:10.1107/S0108270113017423 ]

A new polymorph of bis­(2-amino­pyridinium) fumarate-fumaric acid (1/1) from powder X-ray diffraction

S. Dong, Y. Tao, X. Shen and Z. Pan

Synopsis: A new polymorph of bis(2-aminopyridinium) fumarate-fumaric acid (1/1), determined using powder X-ray diffraction data, is described. The similarities and differences in hydrogen bonds between the new and previous polymorph are discussed in order to understand the polymorphism of the title salt.

Formula: 2C5H7N2+·C4H2O42-·C4H4O4

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