Synthesis and Structural Determination of Nine-coordinate K2［YⅢ(dtpa)(H2O)］.7H2O  

作　　者：王君 赵瑾 张向东 高敬群 

出　　处：《Rare Metals》2000年第4期241-247,共7页稀有金属（英文版）

基　　金：ThisprojectwassupportedbytheScienceFoundationofScienceandTechnologyCommitteeofLiaoningProvince .

摘　　要：The synthesis and structure of the title complex K_2[Y Ⅲ(dtpa)(H_2O)]·7H_2O (dtpa=diethylenetriaminepentaacetate) were studied. The crystal and molecular structures of the complex were determined by single-crystal X-ray structure analysis. The crystal of the complex K_2[Y Ⅲ(dtpa)(H_2O)]·7H_2O belongs to triclinic crystal system and P(-1) space group.The crystal data are as follows:a=0.9671(2)nm,b=1.1327(2)nm,c=1.3389(3)nm,β=86.76(3)°,γ=68.72(3)°,V=1.3324(5)nm3,Z=2,M=699.53,D_C=1.744 g·cm -3,μ=2.586 mm -1 and F(000)=720. The final R and R_W are 0.0467 and 0.1195 for 4524(I>2σ(I)) unique reflections, respectively. The complex anion [Y Ⅲ(dtpa)(H_2O)] 2- has a pseudo-monocapped square antiprismatic nine-coordinate structure in which eight coordinate atoms, three N and five O are from a dtpa ligand and one water molecule coordinates to Y Ⅲ ion directly as the ninth ligand.The synthesis and structure of the title complex K_2[Y Ⅲ(dtpa)(H_2O)]·7H_2O (dtpa=diethylenetriaminepentaacetate) were studied. The crystal and molecular structures of the complex were determined by single-crystal X-ray structure analysis. The crystal of the complex K_2[Y Ⅲ(dtpa)(H_2O)]·7H_2O belongs to triclinic crystal system and P(-1) space group.The crystal data are as follows:a=0.9671(2)nm,b=1.1327(2)nm,c=1.3389(3)nm,β=86.76(3)°,γ=68.72(3)°,V=1.3324(5)nm3,Z=2,M=699.53,D_C=1.744 g·cm -3,μ=2.586 mm -1 and F(000)=720. The final R and R_W are 0.0467 and 0.1195 for 4524(I>2σ(I)) unique reflections, respectively. The complex anion [Y Ⅲ(dtpa)(H_2O)] 2- has a pseudo-monocapped square antiprismatic nine-coordinate structure in which eight coordinate atoms, three N and five O are from a dtpa ligand and one water molecule coordinates to Y Ⅲ ion directly as the ninth ligand.

关 键 词：YⅢ Diethylenetriaminepentaacetate(dtpa) Complex Structure 

分 类 号：O614.3[理学—无机化学]