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Acta Cryst. (2001). E57, o869-o871 [ doi:10.1107/S1600536801013939 ]
Abstract: The crystal structure of 4,4'-bipyridine-3,3'-dicarboxylic acid dihydrate, C12H8N2O4·2H2O, has been determined at 130 (1) K. The molecule exists in a zwitterionic form in the crystal and forms an extensive network of hydrogen bonds via the incorporated water molecules.
Online 31 August 2001
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