Rubidium 2,4,6-trioxo-1,3-diazinan-5-ide-1,3-diazinane-2,4,6-trione-water (1/1/1)

Abstract

The asymmetric unit of the title compound, Rb+·C 4H3N2O3-· - C4H4N2O3·H2O, consists of one rubidium cation, a barbituric acid molecule, a barbiturate anion and one water molecule. The rubidium ion has seven close-contact interactions with O atoms with Rb⋯O distances ranging from 2.8594 (16) to 3.2641 (14) Å. These seven O atoms together with an eighth O atom at 3.492 (2) Åaway from Rb form a distorted polyhedron with shape intermediate between an antiprism and a dodecahedron. The Rb+ ions connect layers built of organic components and water molecules linked via N-H⋯O and O-H⋯O hydrogen bonds.