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In the title compound, {[Ag2Fe(CN)4(H2O)2]·2C12H10N2} n , the asymmetric unit contains one Fe(II) cation, two water mol-ecules, two di-cyanido-argentate(I) anions and two uncoordinating 1,2-bis-(pyridin-2-yl)ethyl-ene (2,2'-bpe) mol-ecules. Each Fe(II) atom is six-coordinated in a nearly regular octa-hedral geometry by four N atoms from di-cyanido-argentate(I) bridges and two coordinating water mol-ecules. The Fe(II) atoms are bridged by di-cyanido-argentate(I) units to give a two-dimensional layer with square-grid spaces. The inter-grid spaces with inter-layer distance of 6.550 (2) Å are occupied by 2,2'-bpe guest mol-ecules which form O-H⋯N hydrogen bonds to the host layers. This leads to an extended three-dimensional supra-molecular architecture. The structure of the title compound is compared with some related compounds containing di-cyanido-argentate(I) ligands and N-donor organic co-ligands.

acta crystallographica. section e

Crystal structure of a two-dimensional grid-type iron(II) coordination polymer: poly[[diaquatetra-μ-cyanido-diargentate(I)iron(II)]<i>trans</i>-1,2-bis(pyridin-2-yl)ethylene disolvate]

Crystal structure of a two-dimensional grid-type iron(II) coordination polymer: poly[[diaquatetra-μ-cyanido-diargentate(I)iron(II)]trans-1,2-bis(pyridin-2-yl)ethylene disolvate]