Bis(3-amino­pyrazine-2-carboxyl­ato-κ(2) N (1),O)diaqua­cobalt(II)

In the title compound, [Co(C(5)H(4)N(3)O(2))(2)(H(2)O)(2)], the Co(II) atom is situated on a twofold rotation axis and is N,O-chelated by two 3-amino­pyrazine-2-carboxyl­ate anions and additionally bonded to the O atoms of two water mol­ecules, leading to a slightly distorted octa­hedral coordination environment. The crystal packing is dominated by inter­molecular O—H⋯O, O—H⋯N and N—H⋯O hydrogen bonding involving the water mol­ecules and amino groups as donors and carboxyl­ate O atoms, as well as the non-coordinating heterocyclic N atoms as acceptors, resulting in a three-dimensional network. An intra­molecular N—H⋯O hydrogen bond is also observed.