Poly[[diaqua-μ(4)-pyrazine-2,3-dicarboxyl­ato-κ(6) N,O (2):O (2′):O (3),O (3′):O (3)-strontium(II)] monohydrate]

In the title compound, {[Sr(C(6)H(2)N(2)O(4))(H(2)O)(2)]·H(2)O}(n), the Sr(II) ions are bridged by the pyrazine-2,3-dicarboxyl­ate ligands with the formation of two-dimensional polymeric layers parallel to the ac plane. Each Sr(II) ion is eight-coordinated by one N and five O atoms from the four ligands and two water mol­ecules. The coordination polyhedron is derived from a penta­gonal bipyramid with an O atom at the apex on one side of the equatorial plane and two O atoms sharing the apical site on the other side. The coordinated and uncoordinated water mol­ecules are involved in O—H⋯O and O—H⋯N hydrogen bonds, which consolidate the crystal structure.