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The central CuN 4 O 2  motif of the title compound, [Cu(ClO 4 ) 2 (C 8 H 6 N 4 )(C 10 H 8 N 2 )]  n  , exhibits a Jahn–Teller-distorted octa­hedral geometry around the metal centre, showing a considerably long Cu—O bond distance of 2.634 (4) Å towards the second perchlorate group occupying the sixth coordination site, giving a (4+1+1)-type coordination mode. The 4,4′-bipyridine (bipy) ligands are highly twisted with respect to each other, the dihedral angle between the two pyridyl ring planes being 38.9 (2)°. The bipy ligands act as bridging ligands between [Cu(ClO 4 ) 2 (2,2′-bpym)] (2,2′-bpym is 2,2′-bipyrimidine) units, generating an infinite one-dimensional zigzag chain along [010]. Intra- and intermolecular C—H⋯O hydrogen bonds are present in the crystal structure.

acta crystallographica. section e

catena-Poly[[(2,2′-bipyrimidine-κ2N1,N1′)diperchloratocopper(II)]-μ-4,4′-bipyridine-κ2N:N′]