Acta Cryst. (2006). E62, m801-m803  [ doi:10.1107/S1600536806008828 ]

1,1'-(Butane-1,4-diyl)bis(1H-benzimidazol-3-ium) diiodo(pyridine-2,6-dicarboxylato-³O,N,O')mercurate(II)

T.-H. Bao and Z.-Y. Hou

Abstract: In the title complex, (C₁₈H₂₀N₄)[HgI₂(C₇H₃NO₄)], the Hg atom exists in a distorted trigonal-bipyramidal geometry formed by two I atoms, one pyridine N and two carboxylate O atoms from a chelating 2,6-pyridinedicarboxylate ligand. Extensive hydrogen bonding between the carboxylate groups and the 1,1'-(butane-1,4-diyl)bis(1H-benzimidazol-3-ium) ion is present in the structure, as well as - stacking interactions. The cation has a crystallographic centre of symmetry. In the anion, a crystallographic twofold rotation axis coincides with the Hg-N bond.

Online 17 March 2006

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