4-Phenylpyridinium 3-carboxy-2,3-dihydroxypropanoate dihydrate

Abstract

In the title compound, C11H10N+·C4H5O6−·2H2O, hydrogen tartrate anions and water mol­ecules are linked by strong O—H⋯O hydrogen bonds to form corrugated layers. The 4-phenyl­pyridinium cation decorates the layer from both sides, being hydrogen bonded to the water mol­ecule only. The three-dimensional packing of the complex layers is accomplished by strong π–π inter­actions of 3.668 (2) Å between the centroids of the benzyl and pyridine rings related by the symmetry operator (x − {1 \over 2}, −y + {1 \over 2}, −z).