Synthesis and Structural Determination of Eight Coordinate NH_4[Yb(Ⅲ)(Cydta)(H_2O)_2]·5H_2O

作     者：王君 张向东 贾卫国 李慧芳 领小 

作者机构：Dept. of Chem. Liaoning Univ. Shenyang 110036 China 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2002年第20卷第5期

页      面：391-394页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：ProjectsupportedbytheNationalScienceFoundationofLiaoningProvinceScienceandTechnologyCommittee ( 9810 3 0 0 90 1) 

主　　题：rare earths Yb 3+ trans 1,2 cyclohexanediaminetetraacetic acid(H 4Cydta) 

摘      要：Synthesis and structure of the complex NH 4[Yb(Cydta) (H 2O) 2]·5H 2O(Cydta=trans 1,2 cyclohexanediaminetetraacetic acid) were reported. The crystal and molecular structures of the title complex were determined by single crystal X ray structure analysis. The crystal of the complex NH 4[Yb Ⅲ(Cydta)(H 2O) 2]·5H 2O belongs to triclinic crystal system and P (1) space group. The crystal data are as follows: a =0.8584(4) nm, b =1.0040(4) nm, c =1.4418(6) nm, V =1.2025(9) nm 3, Z =2, M =659.49, D c=1.821 g·cm -3 , μ =3.963 mm -1 and F (000)=662. The final R and R w values for 4093 ( I 2 θ(I )) unique reflections are 0.0454 and 0.0927, and the R and R w values for 4877 (all data) are 0.0624 and 0.0985, respectively. The complex anion [Yb(Cydta)(H 2O) 2] - has a pseudo square antiprismatic eight coordinate structure in which the six coordinate atoms, two N and four O, are from a Cydta ligand and two water molecules coordinate to Yb(Ⅲ) ion directly as the another two ligands.