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Acta Cryst. (2013). E69, m320-m321
[ doi:10.1107/S1600536813012312 ]

catena-Poly[[[diaquabis(selenocyanato-[kappa]N)iron(II)]-[mu]-1,2-bis(pyridin-4-yl)ethane-[kappa]2N:N'] 1,2-bis(pyridin-4-yl)ethane disolvate dihydrate]

S. Wöhlert, I. Jess and C. Näther

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%).

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