Catena-Poly[[[diaquabis(selenocyanato-κN)iron(II)]-μ-1,2-bis(pyridin-4-yl)ethane-κ2N:N′] 1,2-bis(pyridin-4-yl)ethane disolvate dihydrate

Susanne Wöhlert,Christian Näther,Inke Jess

doi:10.1107/s1600536813012312

Abstract

The title compound, {[Fe(NCSe)2(C12H12N2)(H2O)2]·2C12H12N2·2H2O}n, was obtained by the reaction of iron(II) sulfate heptahydrate and potassium selenocyanate with 1,2-bis(pyridin-4-yl)ethane (bpa) in water. The FeII cation is coordinated by two N-bonded selenocyanate anions, two water molecules and two 1,2-bis(pyridin-4-yl)ethane (bpa) ligands in a slightly distorted octahedral geometry. In addition, two non-coordinating bpa molecules and two water molecules are present. The FeII cation is located on a center of inversion while the coordinating bpa ligand is located on a twofold rotation axis. The FeII cations are linked by the bpa ligands into chains along the b-axis direction, which are further connected into layers perpedicular to the c axis by O—H⋯N and O—H⋯O hydrogen bonds to the non-coordinating bpa and the water molecules. The crystal studied was twinned by pseudo-merohedry (180° rotation along c*; contribution of the minor twin component 3.7%).

Highlights

Sulfate heptahydrate and potassium selenocyanate with 1,2bis(pyridin-4-yl)ethane in water
The FeII cation is coordinated by two N-bonded selenocyanate anions, two water molecules and two 1,2-bis(pyridin-4-yl)ethane ligands in a slightly distorted octahedral geometry
The FeII cation is located on a center of inversion while the coordinating bpa ligand is located on a twofold rotation axis

Summary

Structure Reports

ISSN 1600-5368 catena-Poly[[[diaquabis(selenocyanatojN)iron(II)]-l-1,2-bis(pyridin-4-yl)ethane-j2N:N0 ] 1,2-bis(pyridin-4-yl)ethane disolvate dihydrate]. The title compound, {[Fe(NCSe)2(C12H12N2)(H2O)2]2C12H12N22H2O}n, was obtained by the reaction of iron(II). Sulfate heptahydrate and potassium selenocyanate with 1,2bis(pyridin-4-yl)ethane (bpa) in water. The FeII cation is coordinated by two N-bonded selenocyanate anions, two water molecules and two 1,2-bis(pyridin-4-yl)ethane (bpa) ligands in a slightly distorted octahedral geometry. Two non-coordinating bpa molecules and two water molecules are present. The FeII cation is located on a center of inversion while the coordinating bpa ligand is located on a twofold rotation axis. The FeII cations are linked by the bpa ligands into chains along the b-axis direction, which are further connected into layers perpedicular to the c axis by O—H N and O—H O hydrogen bonds to the non-coordinating bpa and the water molecules. The crystal studied was twinned by pseudo-merohedry (180 rotation along c*; contribution of the minor twin component 3.7%)

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