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The title coordination polymer, {[Cu2(C6H15N2O)2(C10H8N2)](ClO4)2} n, was synthesized from 4,4′-bipyridine, N-hydroxypropyl-1,3-propanediamine and copper(II) per­chlorate. Structural analysis shows that each copper ion is coordinated by the 4,4′-bipyridine mol­ecule through one N atom, and by two N-hydroxypropyl-1,3-propanediamine ligands through the O atom and two N atoms of one, and the O atom from the second, giving a distorted square-pyramidal geometry. There are centres of inversion at the mid-points of the Cu2O2 ring and the bridging ligand. [ABSTRACT FROM AUTHOR]