| ［Ln(EO2)3］(ClO4)3·3H2O的晶体结构研究 |
| STUDY ON THE CRYSTAL STRUCTURE OF ［Ln(EO2)3］(ClO4)3·3H2O |
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| 摘要: 合成了希土高氯酸盐开环冠醚二缩乙二醇(EO2)晶体，(Ln=Nd, Ho)，测定了结构，文内以Nd-L的数据为主要研究对象(方括号内是Ho-L的数据)。晶体属单斜晶系，P21/n空间群，化学式［Ln(EO2)3］(ClO4)3·3H2O，晶胞参数为：a=14.124(1)［14.087］, b=13.990(1)［14.039］, c=15.265(1)［15.014］?; β=95.78(1)［95.64］°; V=3001.1(6)［2955］?3; Mr=815.01［835.70］; Z=4; Dc=1.804［1.865］g/cm3；石墨单色器，μ(MoKα)=2.09［3.07］ mm-1，最终偏离因子R=0.055［0.074］, RW=0.071［0.109］。研究结果表明晶体具有相同的结构，配位多面体为九配位三帽三棱柱。发现EO2醚链有绕C-C键呈STT分布的规律。弱配体高氯酸根不参加配位。 |
| 关键词: 希土高氯酸盐 开环冠醚二缩乙二醇(EO2) 晶体结构 |
| 基金项目: |
| Abstract: The crystals of title compunds are synthesized (Ln=Nd, Ho) and their crystal structures are determined. The data of Nd-L are being used in this report (in ［］ lelongs to Ho-L). These crystals belong to monoclinic system with space group P21/n. The cell parameters are a=14.124(1)［14.087］, b=13.990(1)［14.039］, c=15.265(1)［15.014］?; β=95.78(1)［95.64］°; V=3001.1(6)［2955］?3; Mr=815.01［835.70］; Z=4; Dc=1.804［1.865］g/cm3; μ(MoKα)=2.09［3.07］ mm-1. The final R=0.055［0.074］, RW=0.071［0.109］. The result showed that the coordinative polyhedron was nine-coordinated and three prism with three caps. We also found that the ether link round the bond of C-C arranged into STT(Symmetry, Trans). The ClO4-1 does not take part in coordination. |
| Keywords: rare earth perchlorate acyclic polyether diglycol(EO2) crystal structure |
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| 顾建明,胡秀荣,李巧玲,陈林深.［Ln(EO2)3］(ClO4)3·3H2O的晶体结构研究[J].无机化学学报,1998,14(3):313-317. |
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