| |
| Three novel complexes, Zn(BDC-Cl4)(C5H5N)3(1), Cu(BDC-Cl4)(C5H5N)3(2) and Cd(BDC-Cl4)(C5H5N)3(3) (BDC-Cl4 = 2,3,5,6-tetrachloro-1,4-benzenedicarboxylate, tetrachloroterephthalate) have been synthesized. Complexes were characterized by X-ray single crystal diffraction, elemental analyse, FT-IR and thermogravimetric analysis. Complex 1 and 2 have been obtained by solvothermal method. Both of them have a five-coordination geometry with two monodentate tetrachloroterephthalate ligands and three pyridine molecules coordinated to the Zn(II) or Cu(II) ion center. The monodentate tetrachloroterephthalate bridge the adjacent Zn(II) or Cu(II) centers to lead to zig-zag chains. Complex 3 have also been gained by slow solvent diffusion. Each Cd(II) atom is six-coordinated to three carboxylate oxygen atoms and three pyridyl nitrogen atoms. Two type of tetrachloroterephthalate ligand, monodentate and bidentate carboxylate, connects Cd(II) center form zig-zag chains. Thermogravimetric analysis indicate that the mass loss of ligand starts at 240, 220 and 250 ℃ for complex 1, 2 and 3 respectively. |
|
| Keywords:2,3,5,6-Tetrachloro-1,4-benzenedicarboxylate;Coordination polymers;Zig-zag chains;X-ray diffraction |
|
