Bis(μ(3)-pyrimidine-4-carboxyl­ato)bis­(μ(2)-pyrimidine-4-carboxyl­ato)tetra­kis­(aqua­lithium)

The asymmetric unit of the title compound, [Li(4)(C(5)H(3)N(2)O(2))(4)(H(2)O)(4)], contains two symmetry-independent Li(I) ions, two symmetry-independent ligands and two symmetry-independent coordinated water mol­ecules. They form a dinuclear unit in which the two Li(I) ions are bridged by two carboxyl­ate O atoms from the two ligands. Two dinuclear units related by an inversion centre form the tetra­meric mol­ecule. One of the Li(I) ions shows a distorted tetra­hedral coordination geometry, the other a distorted trigonal–bipyramidal environment. The tetra­mers are held together by hydrogen bonds in which coordinated water mol­ecules act as donors, and the carboxyl­ate O atoms act as acceptors. A hydrogen bond between coordinated water molecule as donor and a ring N atom as acceptor is also observed.