Acta Cryst. (2009). E65, m1709  [ doi:10.1107/S1600536809051101 ]

Poly[1,4-bis(4-pyridylmethyl)piperazinediium [[tetraaquacobaltate(II)]--pyromellitato-²O¹:O⁴] dihydrate]

L. K. Sposato and R. L. LaDuca

Abstract: In the title compound, {(C₁₆H₂₂N₄)[Co(C₁₀H₂O₈)(H₂O)₄]·2H₂O}_n, the octahedrally coordinated Co^II atom is situated on an inversion center and possesses four aqua ligands. The Co atoms are linked into an anionic coordination polymer chain by bis-monodentate pyromellitate ligands. The chain motifs are connected into a supramolecular layer by hydrogen bonding mediated by uncoordinated water molecules. Charge balance is provided by doubly protonated bis(4-pyridylmethyl)piperazine units, which are anchored to the coordination polymer chain motifs by N-HO hydrogen bonding.

Online 28 November 2009

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