Ethyl­enediammonium tetra­bromido­mercurate(II) monohydrate

The Hg(II) atoms in the crystal structure of the title compound, (C(2)H(10)N(2))[HgBr(4)]·H(2)O, are tetra­hedrally coordinated by four Br atoms and the resulting [HgBr(4)](2−) ions are inter­connected to the [NH(3)—CH(2)—CH(2)—NH(3)](2+) ions and water mol­ecules by N—H⋯Br and O—H⋯Br bonds, forming a three-dimensional network. N—H⋯O inter­actions are also present. The observed three different Hg—Br distances of 2.5597 (6), 2.6862 (8) and 2.6923 (8) Å in the tetra­bromo­mercurate unit are due to the connection of Br atoms to different numbers of H atoms. The Hg, O and two Br atoms are located on a crystallographic mirror plane. The cation has [Image: see text] symmetry with the center of the C—C bond lying on a crystallographic center of inversion.