Poly[mu(2)-aqua-mu(2)-(pyrazine-2-carboxylato)-lithium]

The structure of the title compound, [Li(C5H3N2O2)(H2O)](n), contains an Li-I ion with a distorted trigonal-bipyramidal coordination environment involving the N and O atoms of pyrazine-2-carboxylate ligands with a bridging carboxylate group, and two aqua O atoms also in a bridging mode. The symmetry- related Li-I ions bridged by a carboxylate O atom and a coordinating water O atom form an Li2O2 unit with an Li center dot center dot center dot Li distance of 3.052 (4) angstrom, which generates molecular ribbons propagating in the c- axis direction. The ribbons are held together by a network of O-H center dot center dot center dot O hydrogen bonds in which the coordinating water molecules act as donors and the carboxylate O atoms as acceptors.