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化学学报
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化学学报 ›› 2002, Vol. 60 ›› Issue (8): 1452-1458. 上一篇    下一篇

研究论文

九配位K_3[Ho(nta)_2(H_2O)]·5H_2O和八配位NH_4[Ho(cdta)(H_2O)_2]·4.5H_2O配合物的合成及结构

王君;张向东;贾卫国;李慧芳;领小   

  1. 辽宁大学化学系,沈阳(110036)
  • 发布日期:2002-08-15

Synthesis and Structures of Nine-Coordinated K_3[Ho(nta)_2(H_2O)]· 5H_2O and Eight-Coordinated NH_4[Ho(cdta)(H_2O)_2]·4.5H_2O

Wang Jun;Zhang Xiangdong;Jia Weiguo;Li Huifang;Ling Xiao   

  1. Department of Chemistry, Liaoning University,Shenyang(110036)
  • Published:2002-08-15

PDF

603

被引次数

8

报道了稀土金属Ho~(III)离子氨基多羧酸（nta=氨基三乙酸，cdta=反式-1， 2-环乙二氨四乙酸）配合物的合成及分子结构和晶体结构的测定。具体结果如下： （a)分子式K_3[Ho(nta)_2(H_2O)]·5H_2O，单斜晶系，C2/c空间群，a = 1.5364 (8) nm, b = 1.2881(7) nm，c = 2.6163(13) nm, β = 96.140(9)°, V = 5. 416(5) nm~3，Z = 8，D_c = 1.932 g/cm~3, μ = 3.635 nm~(-1)和F(000) = 2944。其R和R_w值分别为0.0310和0.0675(对4509个独立的衍射点），R和R_w值分 别为0.0442和0.0707（对所有10336个衍射点）。K_3[Ho(nta)_2(H_2O)]·5H_2O配 合物中，Ho~(III)N_2O_7部分是一个九配位单帽四方反棱柱体结构。(b)分子式 NH_4[Ho(cdta)(H_2O)_2]·4.5H_2O，三斜晶系，P1，空间群，a = 0.8636(3) nm, b = 1.0072(3) nm, c = 1.4457(5) nm, α = 88.382(5)°, β = 75.275(5)°, γ = 88.382(5)°, V = 1.2154(7) nm~3, Z = 2, D_c = 1.657 g/cm~3, μ = 3.315 nm~(-1)和F(000) = 606。其R和R_w值分别为0.0283和0.0708（对4203个独 立的衍射点），R和R_w值分别为0.0325和0.0730(对所有4595个衍射点）。NH_4 [Ho(cdta)(H_2O)_2]·4.5H_2O配合物中Ho~(III)N_2O_6部分是一个八配位四方反 棱柱体结构。

关键词: 钬络合物, 氨基三乙酸, 晶体结构

The crystal structures of two Ho~(III) complexes with nta (nitrilotriacetic acid) and cdta (trans-1,2- cyclohexanediaminetetraacetic acid) ligands have been reported, respectively. The crystal data are as follows: (a) K_2[Ho(nta)_2(H_2O)] ·5H_2O, monoclinic system, C2/c space group, a = 1.5364(8) nm, b = 1. 2881(7) nm, c = 2.6163(13) nm, β = 96.140(9)°, V = 5.416(5) nm~3, Z = 8, D_c = 1.932 g·cm~(-3), μ = 3.635 mm~(-1), F(000) = 2944, R = 0. 0310, R_w = 0.0675 for 4509 unique reflections and R = 0.0442, R_w = 0. 0707 for all 10336 reflections. The Ho~(III)N_2O_7 part in the complex anion [Ho(nta)_2(H_2O)]~(3-) is a pseudo-monocapped square antiprismatic nine-coordinated structure. (b) NH_4[Ho(cdta)(H_2O)_2]· 4.5H_2O, triclinic system, P1 space group, a = 0.8636(3) nm, b = 1.0072 (3) nm, c = 1.4457(5) nm, α = 88.382(5)°, β = 75.275(5)°, γ = 88. 380(5)°, V = 1.2154(7) nm~3, Z = 2, D_c = 1.657 g/cm~3, μ = 3.315 mm~ (-1), F(000) = 606, R = 0.0283, R_w = 0.0708 for 4203 unique reflections and R = 0.0325, R_w = 0.0730 for all 4595 reflections. The Ho~(III)N_2O_6 part in the complex anion [Ho(cdta) (H_2O)_2]~- is a pseudo square antiprismatic eight-coordinated structure.

Key words: HOLMIUM COMPLEX, nitrilotriacetic acid, CRYSTAL STRUCTURE

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