含手性二硫代双缩脲单元的配位聚合物的一锅法合成及晶体结构

facile one-pot synthesis of a novel chiral dithiobiuret type crystalline coordination polymer was achieved using diffusion method, by layering a solution of (1R, 2R)-(-)-1,2-diisothiocyanatocyclohexane and 3-aminopyridine in CH3OH upon a solution of Cd(NO3)2?4H2O in H2O. The crystal structure was characterized by single-crystal X-ray diffraction, and the unprecedented coordination mode between dithiobiuret unit and metal center was elucidated. The results show that this complex crystallizes in orthorhombic system. The asymmetric unit contains one cadmium ion and two ligands. The cadmium ion adopts an octahedral coordination geometry and is six-coordinated by four sulfur atoms and two nitrogen atoms. The two sulfur atoms of dithiobiuret unit from one ligand coordinate with one cadmium ion, while the pyridine nitrogen atom from the same ligand coordinates with another cadmium ion, forming a one-dimensional chain. These one-dimensional chains are further linked each other into a three-dimensional supramolecular structure through hydrogen bonds.