Title of article :
Crystal structure of a low-spin poly[di-μ3-cyanido-di-μ2-cyanido-bis(μ2-2-ethylpyrazine)dicopper(I)iron(II)]
Author/Authors :
Partsevska, Sofiia V. Department of Chemistry - Taras Shevchenko National University of Kyiv, Ukraine , Naumova, Dina D. Department of Chemistry - Taras Shevchenko National University of Kyiv, Ukraine , Matushko, Igor P. Department of Chemistry - Taras Shevchenko National University of Kyiv, Ukraine , Kucheriv, Olesia I. Department of Chemistry - Taras Shevchenko National University of Kyiv, Ukraine , Gural'skiy, Il'ya A. Department of Chemistry - Taras Shevchenko National University of Kyiv, Ukraine
Abstract :
In the title metal–organic framework, [Fe(C6H8N2)2{Cu(CN)2}2]n, the low-spin FeII ion lies at an inversion centre and displays an elongated octahedral [FeN6] coordination environment. The axial positions are occupied by two symmetry-related bridging 2-ethylpyrazine ligands, while the equatorial positions are occupied by four N atoms of two pairs of symmetry-related cyanide groups. The CuI centre is coordinated by three cyanide carbon atoms and one N atom of a bridging 2-ethylpyrazine molecule, which form a tetrahedral coordination environment. Two neighbouring Cu atoms have a short Cu⋯Cu contact [2.4662 (7) Å] and their coordination tetrahedra are connected through a common edge between two C atoms of cyanide groups. Each Cu2(CN)2 unit, formed by two neighbouring Cu atoms bridged by two carbons from a pair of μ-CN groups, is connected to six FeII centres via two bridging 2-ethylpyrazine molecules and four cyanide groups, resulting in the formation of a polymeric three-dimensional metal–organic coordination framework.
Keywords :
ethylpyrazine , dicyanocuprate , iron(II) , copper(I) , bimetallic , metal–organic framework , crystal structure
Journal title :
Acta Crystallographica Section E: Crystallographic Communications