论文部分内容阅读
A new cadmium(Ⅱ) coordination polymer,namely,[KCd2(edta)I]n(1,H4edta = ethylenediaminetetraacetic acid),has been prepared and structurally characterized by single-crystal X-ray diffraction.Crystallographic data for 1:C10H12Cd2IKN2O8,Mr = 679.02,monoclinic,space group P21/n,a = 9.870(5),b = 8.989(4),c = 19.082(10) ,β = 104.581(10)o,V = 1638.5(13) 3,Z = 4,Dc = 2.753 g/cm3,μ = 4.776 mm-1,F(000) = 1272,the final R = 0.0473 and wR = 0.1311 for 2846 observed reflections with I > 2σ(I).Polymer 1 features a 2-D layered structure,in which each edta4-ligand chelates/bridges five adjacent six-/seven-coordinated Cd(Ⅱ) centers with all ten donors(eight oxygen and two nitrogen) involved with coordination.Additional iodide I-ions as counterions are bound to the Cd(Ⅱ) centers in a terminal mode and the potassium K+ ions are located in the layers and surrounded by O and I atoms from neighboring environment.The thermal stability of 1 has been discussed.
A new cadmium (Ⅱ) coordination polymer, namely, [KCd2 (edta) I] n (1, H4edta = ethylenediaminetetraacetic acid), has been prepared and structurally characterized by single-crystal X-ray diffraction. Crystallographic data for 1: C10H12Cd2IKN2O8, Mr = 679.02, monoclinic space group P21 / n, a = 9.870 (5), b = 8.989 (4), c = 19.082 (10) , β = 104.581 (10) o and V = 1638.5 (1), Z = 4, Dc = 2.753 g / cm3, μ = 4.776 mm-1, F (000) = 1272, the final R = 0.0473 and wR = 0.1311 for 2846 observed reflections with I> 2σ a 2-D layered structure in which each edta4-ligand chelates / bridges five adjacent six- / seven-coordinated Cd (II) centers with all ten donors (eight oxygen and two nitrogen) involved with coordination. Additional iodide I-ions as Counterions are bound to the Cd (II) centers in a terminal mode and the potassium K + ions are located in the layers and surrounded by O and I atoms from neighboring environments. The thermal stability of 1 has been discussed.