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Ethyl­ene­diaminium pyridine-2,5-dicarboxyl­ate dihydrate

✍ Scribed by Smith, Graham ;Wermuth, Urs D. ;Young, David J. ;Healy, Peter C.

Publisher
International Union of Crystallography
Year
2006
Tongue
English
Weight
177 KB
Volume
62
Category
Article
ISSN
1600-5368

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✦ Synopsis

The title compound, C~2~H~10~N~2~
^2+^·C~7~H~3~NO~4~
^2−^·2H~2~O, forms a three-dimensional hydrogen-bonded framework structure in which both of the amine groups of ethylenediamine are protonated and participate in a total of six hydrogen-bonding interactions with carboxylate O-atom acceptors of the anions as well as the water molecules. The cations lie on crystallographic inversion centres and adopt extended conformations, while the anions have twofold rotational symmetry. This results in the pyridine N atom and its ortho-related CH group being disordered over two 50% occupancy sites.

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