Synthesis, crystal structure and thermal stability of 2D layer coordination polymer {[Cd(p-CMSP)(Him)(H2O)]•3H2O}n

The novel coordination polymer {[Cd(p-CMSP)(Him)(H2O)]center dot 3H(2)O}(n) (p-CMSP2 =p-(carboxymethoxy) phenylthioacetate, Him=imidazole) was synthesized by the reaction of Cd(NO3)(2), imidazole and p-(carboxymethoxy) phenylthioacetic acid in an aqueous solution, and characterized by elemental analysis, IR, TG and single crystal X-ray diffraction. The crystal structure is of monoclinic, space group P2(I)/c with a = 1.144 0(2) nm, b = 1.876 7(4) nm, c = 0.877 89(18) nm, beta = 106.31(3)degrees and V = 1.808 9(7) nm(3), Z = 4, R = 0.023 2, wR = 0.051 4. Each Cd(II) atom displays a distorted octahedral coordination geometry, defined by three carboxyl O atoms from different p-CMSP(2-)ligands, one S atom from thioether, one N atom from imidazole and one water molecule. Adjacent Cd(II) ions are bridged by p-CMSP2- groups, resulting in a 2D layer structure. The adjacent (CdCd)-Cd-... distances are 0.492 7 nm and 1.144 0 nm. Furthermore, such layers are linked through hydrogen bonds to form supramolecular network.