Diaqua-(5-methyl-pyrazine-2-carboxyl-ato-κ2 N 1,O)iron(II)

In the neutral title complex, [Fe(C6H5N2O2)2(H2O)2], the coordination geometry aound the FeII atom, which lies on an inversion centre, is distorted octa-hedral comprising two N atoms and two O atoms from two 5-methyl-pyrazine-2-carboxyl-ate ligands, and two water mol-ecules. The crystal structure is stabilized by a network of O - H⋯O hydrogen bonds, resulting in a two-dimensional supra-molecular structure.