Acta Cryst. (2009). E65, m1477-m1478  [ doi:10.1107/S1600536809043839 ]

catena-Poly[[chloridomercury(II)]--1,4-diazabicyclo[2.2.2]octane-²N:N'-[chloridomercury(II)]-di--chlorido]

S.-M. Fang, M. Hu, S.-T. Ma and C.-S. Liu

Abstract: In the title coordination polymer, [Hg₂Cl₄(C₆H₁₂N₂)]_n, each Hg^II center within the chain is four-coordinated by one terminal Cl atom, two bridging ₂-Cl atoms, and one N-atom donor from a ₂-1,4-diazabicyclo[2.2.2]octane (₂-daco) ligand in a distorted tetrahedral geometry. The daco ligand acts as an end-to-end bridging ligand and bridges adjacent Hg^II centers, forming a chain running along [001]. Weak C-HCl hydrogen-bonding interactions link the chains into a three-dimensional network. Comparison of the structural differences with previous findings suggests that the space between the two N donors, as well as the skeletal rigidity in N-heterocyclic linear ligands, may play an important role in the construction of such supramolecular networks.

Online 31 October 2009

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