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Acta Cryst. (2008). E64, m104  [ doi:10.1107/S1600536807064501 ]

catena-Poly[[[diaquairon(II)]-[mu]-pyrazine-2,3-dicarboxylato] dihydrate]

H. Xu, H. Ma, M. Xu, W. Zhao and B. Guo

Abstract: The crystal structure of the title compound, {[Fe(C6H2N2O4)(H2O)2]·2H2O}n, was synthesized by a diffusion method. It has a one-dimensional polymeric chain structure and the chains are further connected into a three-dimensional structure by hydrogen bonds. The FeII ion has a distorted octahedral coordination environment, with two N and two O atoms from the pyrazine-2,3-dicarboxylate ligands in the equatorial plane and with two water molecules in axial positions. The Fe atom lies on a crystallographic centre of symmetry and a twofold rotation axis passes through the pyrazine ring.

Online 6 December 2007


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