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The hydrothermal reaction of an aqueous solution of Cu(CH3COO)2.H2O, 1,2,4,5-benzenetetracarboxylic acid and 4,4'-bipyridine gave rise to the interesting title three-dimensional polymer {[Cu6(btec)3(4,4'-bpy)3(H2O)n(btec is 1,2,4,5-benzenetetracarboxylate, C10H2O84-, and 4,4'-bpy is 4,4'-bipyridine, C10H8N2), in which each btec ligand links six copper(II) cations into a lamellar [Cu6(btec)3(H2O)2]n subpolymer framework. There are two distinct diamine units and two distinct carboxylate units, with one of each lying across an inversion centre. [ABSTRACT FROM AUTHOR]