Crystal structure of tetra­aquabis(1,3-dimethyl-2,6-dioxo-3,7-di­hydro-1H-purin-9-ido)magnesium

The title complex, [Mg(C(7)H(7)N(4)O(2))(2)(H(2)O)(4)], lies across an inversion centre and the Mg(II) atom is coordinated in a slightly distorted octa­hedral environment by four aqua ligands in the equatorial sites and two 1,3-dimethyl-2,6-dioxo-3,7-di­hydro-1H-purin-9-ide ligands, through imidazole ring N atoms, in the axial sites. An intra­molecular O—H⋯O hydrogen bond forms an S(7) graph-set motif. In the crystal, O—H⋯O and O—H⋯N hydrogen bonds link complex mol­ecules forming a three-dimensional network incorporating R (4) (2)(8) and R (2) (2)(18) graph-set motifs.