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- W2006405403 abstract "The title compound, bis[diaquabis(ethylenediamine-κ2N,N′)copper(II)] hexacyanoiron(II) tetrahydrate, [Cu(C2H8N2)2(H2O)1.935]2[Fe(CN)6]·4H2O, was crystallized from an aqueous reaction mixture initially containing CuSO4, K3[Fe(CN)6] and ethylenediamine (en) in a 3:2:6 molar ratio. Its structure is ionic and is built up of two crystallographically different cations, viz. [Cu(en)2(H2O)2]2+ and [Cu(en)2(H2O)1.87]2+, there being a deficiency of aqua ligands in the latter, [Fe(CN)6]4− anions and disordered solvent water molecules. All the metal atoms lie on centres of inversion. The Cu atom is octahedrally coordinated by two chelate-bonded en molecules [mean Cu—N = 2.016 (2) Å] in the equatorial plane, and by axial aqua ligands, showing very long distances due to the Jahn–Teller effect [mean Cu—O = 2.611 (2) Å]. In one of the cations, significant underoccupation of the O-atom site is observed, correlated with the appearance of a non-coordinated water molecule. This is interpreted as the partial contribution of a hydrate isomer. The [Fe(CN)6]4− anions form quite regular octahedra, with a mean Fe—C distance of 1.913 (2) Å. The dominant intermolecular interactions are cation–anion O—H⋯N hydrogen bonds and these interactions form layers parallel to (001)." @default.
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- W2006405403 date "2004-07-31" @default.
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- W2006405403 title "Hydrate isomerism in [Cu(en)<sub>2</sub>(H<sub>2</sub>O)<sub>1.935</sub>]<sub>2</sub>[Fe(CN)<sub>6</sub>]·4H<sub>2</sub>O" @default.
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- W2006405403 doi "https://doi.org/10.1107/s0108270104014581" @default.
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