Acta Cryst. (2007). E63, m2022-m2023  [ doi:10.1107/S1600536807030978 ]

Poly[propane-1,3-diammonium [diaquatetrakis(₄-benzene-1,2,4,5-tetracarboxylato)nickelate(II)] hemihydrate]

H. Aghabozorg, Z. Bahrami, M. Tabatabaie, M. Ghadermazi and J. Attar Gharamaleki

Abstract: The reaction of nickel(II) nitrate hexahydrate with the proton-transfer compound (pnH₂)₂(btc)·2H₂O (where pn = propane-1,3-diamine and btcH₄ = benzene-1,2,4,5-tetracarboxylic acid) in aqueous solution resulted in the formation of the title compound, {(C₃H₁₂N₂)[Ni(C₁₀H₂O₈)(H₂O)₂]·0.5H₂O}_n. Each Ni²⁺ ion is situated on a crystallographic twofold rotation axis and is coordinated in a distorted octahedral geometry by six O atoms [Ni-O = 2.0540 (15)-2.0804 (11) Å] from two water molecules and four btc^4- ligands, which also act as bridging ligands between Ni²⁺ ions. In the crystal structure, intermolecular O-HO, N-HO and C-HO hydrogen bonds and C-H interactions contribute to the formation of a three-dimensional supramolecular structure. The crystal studied was an inversion twin.

Online 30 June 2007

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