title: catena-Poly[[[μ-cyanido-1:2κC:N-tricyanido-1κC-bis(ethylenediamine)-2κN,N'-copper(II)iron(II)]-μ-cyanido-κC:N-[bis(ethylenediamine-κN,N')copper(II)]-μ-cyanido-κN:C] 4.5-hy-drate].
abstract: The asymmetric unit of the title compound, {[Cu(2)Fe(CN)(6)(C(2)H(8)N(2))(4)]·4.5H(2)O}(n), consists of two [Cu(C(2)H(8)N(2))(2)](2+) cations, one [Fe(CN)(6)](4-) anion, four water mol-ecules and a half water mol-ecule that lies on a twofold rotation axis. The Fe(II) atom is coordinated by six C atoms from three terminal and three doubly bridging CN(-) ligands. The bridging CN(-) ligands connect the anion to a five-coordinate [Cu(C(2)H(8)N(2))(2)](2+) cation and to two symmetry-related six-coordinate [Cu(C(2)H(8)N(2))(2)](2+) cations, forming a one-dimensional polymer in the ab plane. Inter-molecular hydrogen bonds connect the polymer units into a three-dimensional network.
authors.forename: Hongling
authors.initials: H
authors.lastname: Liu
authors.forename: Daqi
authors.initials: D
authors.lastname: Wang