Acta Cryst. (2011). E67, o1306 [ doi:10.1107/S1600536811015972 ]
Abstract: In the title hydrated molecular salt, C12H9N2+·C4H5O6-·2H2O, the cation is almost planar (r.m.s. deviation = 0.014 Å); the carbon skeleton of the anion assumes a trans conformation [C-C-C-C torsion angle = -179.86 (14)°]. The carboxyl end of one hydrogen tartrate anion forms a short hydrogen bond to the carboxylate end of another anion [OO = 2.508 (2) Å] in a head-to-tail manner, forming a chain; the chains and water molecules interact, generating an O-HO hydrogen-bonded layer. The cation binds to the layer by an N-HO hydrogen bond.
Online 7 May 2011
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