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Acta Cryst. (2012). E68, m1049-m1050
[ doi:10.1107/S1600536812030437 ]

catena-Poly[[tetra--benzoato-⁸O:O'-dicopper(II)]--[N-(pyridin-4-yl)nicotinamide]-²N:N'-[dibenzoato-²O-copper(II)]--[N-(pyridin-4-yl)nicotinamide]-²N:N']

P. E. Kraft and R. L. LaDuca

Abstract: In the polymeric title compound, [Cu₃(C₇H₅O₂)₆(C₁₁H₉N₃O)₂]_n, square-planar-coordinated Cu^II ions on crystallographic inversion centres are bound by two monodentate benzoate anions. The resulting [Cu(benzoate)]₂ fragments are joined to centrosymmetic [Cu₂(benzoate)₄] paddlewheel clusters [CuCu = 2.6331 (5) Å] by means of bridging N-(pyridin-4-yl)nicotinamide (4-pna) ligands [dihedral angle between the aromatic rings = 39.18 (12)°], thereby forming [Cu₃(benzoate)₆(4-pna)₂]_n coordination-polymer chains that are arranged parallel to the [30-1] crystal direction. These polymeric chains are anchored into supramolecular layers by N-HO hydrogen bonding between neighboring 4-pna ligands. These layers aggregate by crystal packing forces to afford the crystal structure of the title compound.

catena-Poly[[tetra--benzoato-8O:O'-dicopper(II)]--[N-(pyridin-4-yl)nicotinamide]-2N:N'-[dibenzoato-2O-copper(II)]--[N-(pyridin-4-yl)nicotinamide]-2N:N']

P. E. Kraft and R. L. LaDuca

catena-Poly[[tetra--benzoato-⁸O:O'-dicopper(II)]--[N-(pyridin-4-yl)nicotinamide]-²N:N'-[dibenzoato-²O-copper(II)]--[N-(pyridin-4-yl)nicotinamide]-²N:N']