Cytosinium-hydrogen maleate-cytosine (1/1/1)

Abstract

The title organic salt, C4H6N3O +·C4H3O4-·C4H5N3O, was synthesized from cytosine base and maleic acid. An intra-molecular O - H⋯O hydrogen bond occurs in the hydrogen maleate anion. The crystal packing is stabilized by inter-molecular N - H⋯O, N - H⋯N and C - H⋯O hydrogen bonds, giving rise to a nearly planar two-dimensional network parallel to (101).