title: catena-Poly[[μ(2)-aqua-diaqua-bis-(μ(4)-pyridazine-3,6-dicarboxyl-ato)tetra-lithium] monohydrate].
abstract: In the polymeric structure of the title compound {[Li(2)(C(6)H(2)N(2)O(4))(2)Li(H(2)O)(2)Li(H(2)O)]·H(2)O}(n), the coordination of two independent Li(I) ions is distorted trigonal-bipyramidal and that of the other two independent Li(I) ions is distorted tetra-hedral. The former two Li(I) ions are bridged by hetero-ring N atoms of two independent pyridazine-3,6-dicarboxyl-ate ligands, making a dimeric moiety. The carboxyl-ato-O atoms of both bidentate ligands bridge the dimers to adjacent independent aqua-coordinated Li(I) ions, forming mol-ecular ribbons. The latter are bridged by ligand carboxyl-ato and aqua O atoms, forming mol-ecular layers parallel to (100) which are held together by an extended system of O-H⋯O hydrogen bonds.
authors: Institute of Nuclear Chemistry and Technology, ul.Dorodna 16, 03-195 Warszawa,  Poland.
authors: Wojciech
authors: W
authors: Starosta
authors: Janusz
authors: J
authors: Leciejewicz