Poly[([mu]₃-benzene-1,4-dicarboxyl­ato)di-[mu]-chlorido-(triethanol­amine)­dicadmium(II)]: a cadmium-halide coordination polymer with a hydrogen-bonded three-dimensional framework

The structure of the title compound, [Cd₂(C₈H₄O₄)Cl₂(C₆H₁₅NO₃)]_n, consists of one-dimensional chains in which each centrosymmetric tetra­nuclear Cd₄Cl₄O₂ cluster is terminated by two chelating triethanol­amine (teaH₃) ligands but linked to two adjacent clusters through four bridging benzene-1,4-dicarboxyl­ate (bdc) ligands. The tetra­nuclear Cd₄Cl₄O₂ clusters are held together via bridging Cl and O atoms. Three directional hydrogen bonds from the multi-podal hy­droxy groups of the teaH₃ ligand stabilize and extend the one-dimensional chains into a three-dimensional framework. All three hy­droxy groups of the teaH₃ ligand form hydrogen bonds, illustrating the fact that the teaH₃ ligand can serve as an excellent hydrogen-bond donor.