Poly[hydrazin-1-ium [diaqua­bis­(μ(4)-pyridazine-3,6-dicarboxyl­ato)trilithate] monohydrate]

The structure of the title compound, {(N(2)H(5))[Li(3)(C(6)H(2)N(2)O(4))(2)(H(2)O)(2)]·H(2)O}(n), is composed of mol­ecular dimers, each built up of two symmetry-related Li(I) ions with distorted trigonal–bipyramidal coordinations bridged by two deprotonated ligand mol­ecules via their N,O-bonding sites. Doubly solvated Li(I) ions with a distorted tetra­hedral geometry link adjacent dimers, forming a polymer generated by bridging bidentate carboxyl­ato O atoms to Li(I) ions in adjacent dimers, forming anionic layers parallel to the ac plane with monoprotonated hydrazinium cations and crystal water mol­ecules positioned between them. The layers are held together by an extended system of hydrogen bonds in which the hydrazinium cations and coordinated and crystal water mol­ecules act as donors and carboxyl­ate O atoms act as acceptors.