title: Dibromidobis(pyrazine-2-carboxylic acid-κN)mercury(II) dihydrate.
abstract: The asymmetric unit of the title compound, [HgBr(2)(C(5)H(4)N(2)O(2))(2)]·2H(2)O, contains one half-mol-ecule and one water mol-ecule. The Hg(II) ion, lying on a twofold rotation axis, is four-coordinated by two N atoms of pyrazine-2-carboxylic acid ligands and two bromide ions, forming a highly distorted tetrahedral geometry. In the crystal structure, inter-molecular O-H⋯O and O-H⋯N hydrogen bonds link the mol-ecules.
authors.affiliation: Department of Applied Chemistry, College of Science, Nanjing University of Technology, Nanjing 210009, People's Republic of China.
authors.forename: Guo-Wei
authors.initials: GW
authors.lastname: Wang
authors.forename: Wen-Yuan
authors.initials: WY
authors.lastname: Wu
authors.forename: Ling-Hua
authors.initials: LH
authors.lastname: Zhuang
authors.forename: Jin-Tang
authors.initials: JT
authors.lastname: Wang