title: Guanidinium tetra-bromidomercurate(II).
abstract: The Hg atoms in the crystal structure of the title compound, (CH(6)N(3))(2)[HgBr(4)], are tetra-hedrally coordinated by four Br atoms and the resulting [HgBr(4)](2-) tetra-hedral ions are linked to the [C(NH(2))(3)](+) ions by bromine-hydrogen bonds, forming a three-dimensional network. In the structure, the anions are located on special positions. The two different Hg⋯Br distances of 2.664 (1) and 2.559 (1) Å observed in the tetra-bromidomercurate unit are due to the connection of Br atoms to different number of H atoms.
authors.forename: Hiromitsu
authors.initials: H
authors.lastname: Terao
authors.forename: Thorsten M
authors.initials: TM
authors.lastname: Gesing
authors.forename: Hideta
authors.initials: H
authors.lastname: Ishihara
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Furukawa
authors.forename: B Thimme
authors.initials: BT
authors.lastname: Gowda