Acta Crystallographica Section C

Crystal Structure Communications

Volume 65, Part 7 (July 2009)

metal-organic compounds

em3027 scheme

Acta Cryst. (2009). C65, m241-m245 [ doi:10.1107/S0108270109019490 ]

Two polymeric structures with a benzene-1,2,4,5-tetracarboxylate ligand acting in ₂- and ₄-bridging modes

A. M. Atria, G. Corsini, L. González, M. T. Garland and R. Baggio

Abstract: catena-Poly[[tetraaquabis(1H-pyrazole- [kappa] N²)nickel(II)] [[diaquabis(1H-pyrazole- [kappa] N²)nickel(II)]- [mu] -benzene-1,2,4,5-tetracarboxylato- [kappa] ²O¹:O⁴] tetrahydrate], {[Ni(C₃H₄N₂)₂(H₂O)₄][Ni(C₁₀H₂O₈)(C₃H₄N₂)₂(H₂O)₂]·4H₂O}_n, (I), and poly[[( [mu] ₄-benzene-1,2,4,5-tetracarboxylato- [kappa] ⁴O¹:O²:O⁴:O⁵)octakis(1H-pyrazole- [kappa] N²)dicobalt(II)] tetrahydrate], {[Co₂(C₁₀H₂O₈)(C₃H₄N₂)₈]·4H₂O}_n, (II), are polymeric compounds crystallizing in the space group P $\overline{1}$ , with two independent metallic cations and one benzene-1,2,4,5-tetracarboxylate (btc) anion, each lying on symmetry centres. Individual coordination polyhedra are regular and the main differences are in the way the btc anion binds [ [mu] ₂ in (I) and [mu] ₄ in (II)], promoting a `chain-like' one-dimensional structure in (I) and a `sieve-like' two-dimensional motif in (II).

Formula: [Ni(C₃H₄N₂)₂(H₂O)₄][Ni(C₁₀H₂O₈)(C₃H₄N₂)₂(H₂O)₂]·4H₂O and [Co₂(C₁₀H₂O₈)(C₃H₄N₂)₈]·4H₂O


	Structure factor file (CIF format) (178.9 kbytes) [ doi:10.1107/S0108270109019490/em3027Isup2.hkl ] Contains datablock I

	Structure factor file (CIF format) (218.2 kbytes) [ doi:10.1107/S0108270109019490/em3027IIsup3.hkl ] Contains datablock II

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