Acta Cryst. (2009). E65, m17-m18  [ doi:10.1107/S1600536808040282 ]

Poly[ethylenediaminium [di--aqua-(₆-benzene-1,2,4,5-tetracarboxylato-¹⁰O¹,O^1':O²,O^2':O^2':O⁴,O^4':O⁵:O⁵,O^5')dithallium(I)]]

M. Rafizadeh and F. Manteghi

Abstract: The title compound, {(C₂H₁₀N₂)[Tl₂(C₁₀H₂O₈)(H₂O)₂)]}_n, was prepared using (enH₂)₂(btc)·2H₂O and thallium(I) nitrate (en = ethylenediamine and btcH₄ = benzene-1,2,4,5-tetracarboxylic acid). The enH₂ cation and btc ligand are each located on an inversion centre. The Tl^I atom is seven-coordinated by three btc ligands and two water molecules in an irregular geometry due to the stereochemically active lone pair on the Tl centre. The water molecule and btc ligand are bonded to the Tl atoms in - and ₆-forms, respectively, leading to a three-dimensional structure. The crystal structure involves O-HO, N-HO and C-HO hydrogen bonds, and also a Tl interaction of 3.537 (1) Å.

Online 6 December 2008

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