Acta Cryst. (2008). E64, m13  [ doi:10.1107/S1600536807061491 ]

Dibromidobis(pyrazine-2-carboxylic acid-N⁴)mercury(II) dihydrate

G.-W. Wang, W.-Y. Wu, L.-H. Zhuang and J.-T. Wang

Abstract: The asymmetric unit of the title compound, [HgBr₂(C₅H₄N₂O₂)₂]·2H₂O, contains one half-molecule and one water molecule. 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, intermolecular O-HO and O-HN hydrogen bonds link the molecules.

Online 6 December 2007

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