Glycinium hydrogen fumarate glycine solvate monohydrate

Abstract

In the title compound, C2H6NO2+·C4H3O4−·C2H5NO2·H2O, the asymmetric unit contains two glycine residues, one protonated and one in the zwitterionic form, a hydrogen fumarate anion and a water molecule. Through N—H...O and O—H...O hydrogen bonds, molecules assemble in layers parallel to the (10overline{1}) plane, one layer of hydrogen fumarate anions alternating with two layers of glycine molecules. In each glycine layer, hydrogen bonds generate an R44(19) graph-set motif. Further hydrogen bonds involving the water molecule and the hydrogen fumarate anions result in the formation of a three-dimensional network.