Poly[triaquabis­(μ(2)-3-carboxy­pyrazine-2-carboxyl­ato)dilithium(I)]

In the title compound, [Li(2)(C(6)H(3)N(2)O(4))(2)(H(2)O)(3)](n), the coordination number for both independent Li(+) cations is five. One of the Li(+) ions has a distorted trigonal–bipyramidal geometry, coordinated by one of the carboxyl O atoms of a 3-carboxy­pyrazine-2-carboxyl­ate ligand, two O atoms from two water mol­ecules, and an N and a carboxyl­ate O atom of a second 3-carboxy­pyrazine-2-carboxyl­ate ligand. The other Li(+) ion also has a distorted trigonal–bipyramidal geometry, coordinated by one water mol­ecule and two 3-carboxy­pyrazine-2-carboxyl­ate ligands through an N and a carboxyl­ate O atom from each. One of the carboxyl groups of the two ligands takes part in an intra­molecular O—H⋯O hydrogen bond. The stabilization of the crystal structure is further assisted by O—H⋯O, O—H⋯N and C—H⋯O hydrogen-bonding inter­actions involving the water mol­ecules and carboxyl­ate O atoms.