Acta Crystallographica Section C

Volume 65, Part 7 (July 2009)

metal-organic compounds

ln3133 scheme

Acta Cryst. (2009). C65, m250-m254 [ doi:10.1107/S0108270109021404 ]

Two polymeric nickel(II) complexes with aromatic benzene-1,2,4,5-tetracarboxylate and pyridine-2,5-dicarboxylate linkers

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

Abstract: ( [mu] -Benzene-1,2,4,5-tetracarboxylato- [kappa] ²O¹:O⁴)bis[aquabis(2,2-methylpropane-1,3-diamine- [kappa] ²N,N')nickel(II)] methanol disolvate tetrahydrate, [Ni₂(C₁₀H₂O₈)(C₅H₁₄N₂)₄(H₂O)₂]·2CH₄O·4H₂O, (I), is dinuclear, with elemental units built up around an inversion centre halving the benzene-1,2,4,5-tetracarboxylate (btc) anion, which bridges two symmetry-related Ni^II cations. The octahedral Ni polyhedron is completed by two chelating 2,2-methylpropane-1,3-diamine (dmpda) groups and a terminal aqua ligand. Two methanol and four water solvent molecules are involved in a number of N-HO and O-HO hydrogen bonds which define a strongly bound two-dimensional supramolecular structure. The structure of catena-poly[[[bis(2,2-methylpropane-1,3-diamine- [kappa] ²N,N')nickel(II)]- [mu] -pyridine-2,5-dicarboxylato- [kappa] ³O⁵:N,O²-[(2,2-methylpropane-1,3-diamine- [kappa] ²N,N')nickel(II)]- [mu] -pyridine-2,5-dicarboxylato- [kappa] ³N,O²:O⁵] octahydrate], {[Ni₂(C₇H₃NO₄)₂(C₅H₁₄N₂)₃]·8H₂O}_n, (II), is polymeric, forming twisted chains around three independent Ni centres, two of which lie on inversion centres and the third in a general position. There are three chelating dmpda ligands (one disordered over two equally populated positions), which are each attached to a different cation, and two pyridine-2,5-dicarboxylate (pdc) anions, both chelating the Ni centre in general positions through an -O-C-C-N- loop, while acting as bridges to the remaining two centrosymmetric Ni atoms. There are, in addition, eight noncoordinated water molecules in the structure, some of which are disordered.

Formula: [Ni₂(C₁₀H₂O₈)(C₅H₁₄N₂)₄(H₂O)₂]·2CH₄O·4H₂O and [Ni₂(C₇H₃NO₄)₂(C₅H₁₄N₂)₃]·8H₂O


	Structure factor file (CIF format) (263.7 kbytes) [ doi:10.1107/S0108270109021404/ln3133Isup2.hkl ] Contains datablock I

	Structure factor file (CIF format) (470.4 kbytes) [ doi:10.1107/S0108270109021404/ln3133IIsup3.hkl ] Contains datablock II

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