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The asymmetric unit of the title compound, [HgBr2(C5H4N2O2)2]&#183;2H2O, contains one half-molecule and one water molecule. The HgII 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&#8212;H...O and O&#8212;H...N hydrogen bonds link the molecules

Dibromidobis(pyrazine-2-carboxylic acid-κN4)mercury(II) dihydrate

Dibromidobis(pyrazine-2-carboxylic acid-κN⁴)mercury(II) dihydrate