Synthesis and Crystal Structure of Neodymium Complex with Glycine [Nd（Gly）(H2O)7]Cl3

The title complex [Nd(Gly)(H 2O) 7]Cl 3 was synthesized and its crystal structure was determined by X ray diffraction to obtain a final R value of 0 026 0 and a wR value of 0 086 8. The crystal is of monoclinic system with a space groug Pm . Every two neodymium ions in the crystal are connected with a carboxyl group to form a polymeric chain molecule. And each neodymium ion is further coordinated with seven oxygen atoms from water molecules. The counter ion(Cl -) is non coordinated to fill up the space between the polymeric chains. So the Nd 3+ cation is nine coordinated and the coordination polyhedron is a trigonotetradecahedron. In addition, there exists the mirror symmetry in the complex.