catena -Poly[[aqua(pyrazine-2-carboxylato)iron(II)]-μ-pyrazine-2-carboxylato]

The title compound, [Fe(C10H6N4O4)2(H2O)]n, has been prepared from an aqueous solution of iron(II) chloride and pyrazine-2-carboxylic acid. The asymmetric unit contains one FeII, two pyrazine-2-carboxyl­ate anions and one aqua ligand. The FeII atoms are linked via bridging pyrazine-2-carboxyl­ate ligands, leading to a polymeric structure with zigzag-chains extending parallel to the b axis. The coordination of the Fe atom is distorted octa­hedral.