Syntheses and structures of nine-coordinate NH4[HoIII(Edta)(H2O)3] · 1.5H2O, (NH4)4[Ho 2 III (Dtpa)2] · 9H2O, and (NH4)3[HoIII(Ttha)] · 5H2O complexes
作者:X. F. Wang、X. Zh. Liu、J. Wang、Zh. H. Zhang、W. Sun、Y. M. Kong、X. D. Zhang
DOI:10.1134/s1070328408020097
日期:2008.2
The three title complexes, NH4[HoIII(Edta)(H2O)3] · 1.5H2O (I) (H4Edta = ethylenedianine-N,N,N′,N′-tetraacetic acid), (NH4)4[Ho 2 III (Dtpa)2] · 9H2O (II) (H5Dtpa = diethylenetriamine-N,N,N′,N″,N″-entaacetic acid), and (NH4)3[HoIII(Ttha)] · 5H2O (III) (H6 Ttha = triethylenetetramine-N,N,N′,N″,N‴,N‴-hexaacetic acid), have been prepared and characterized by FT-IR, elemental analyses, and single-crystal X-ray diffraction technique. Complex I has a nine-coordinate mononuclear structure with distorted monocapped square antiprismatic conformation and its crystal structure belongs to orthorhombic system and Fdd2 space group. The crystal data are as follows: a = 19.343(9), b = 35.125(17), c = 12.364(6) Å, V = 8400(7) Å3, Z = 16, M = 552.26, ρcalcd = 1.747 g cm−3 μ = 3.828 mm−1, and F(000) = 4368. Complex II has a binuclear nine-coordinate pseudomonocapped square antiprismatic conformation and its crystal structure belongs to triclinic system and space P1 group. The crystal data are as follows: a = 9.7637(16), b = 9.9722(16), c = 12.945(2) Å, α= 85.853(2)°, β = 77. 140(2)°, γ = 77.140(2)°, V = 1198.4(3) Å3, Z = 1, M = 1340.80, ρcalcd = 1.858 g cm−3, μ = 3.380 mm−1, and F(000) = 674. As for complex III, it also has nine-coordinate mononuclear structure with distorted tricapped trigonal prism and its crystal structure belongs to monoclinic system andP21/c space group. The crystal data are as follows: a = 10.349(3), b = 12.760(4), c = 23.142(7) Å, β = 91.020(6)°, V = 3055.6(16) Å3, Z = 2, M = 797.55, ρcalcd = 1.734 g cm−3, μ = 2.674 mm−1, and F(000) = 1624. The results showed that although the ligands are different from one another in the shape and the numbers of coordination atoms, they all have nine-coordinate structures. However, one of them has binuclear structure and the other two have mononuclear structures because of the difference of the ligands.
三个标题复合物,NH4[HoIII(Edta)(
H2O)3] - 1.5 (I)(H4Edta =
乙二胺-N,N,N′,N′-
四乙酸),(NH4)4[Ho 2 III (Dtpa)2] - 9 (II)(H5Dtpa =
二乙烯三胺-N,N,N′,N″,N″-五
乙酸)、和 (NH4)3[HoIII(Ttha)] - 5 (III) (H6 Ttha =
三乙烯四胺-N,N,N′,N″,N‴,N‴-六
乙酸),并通过傅立叶变换红外光谱、元素分析和单晶 X 射线衍射技术进行了表征。络合物 I 具有九配位单核结构,具有扭曲的单帽方形反斜方构象,其晶体结构属于正方晶系和 Fdd2 空间群。晶体数据如下:a = 19.343(9), b = 35.125(17), c = 12.364(6) Å, V = 8400(7) Å3, Z = 16, M = 552.26, ρcalcd = 1.747 g cm-3 μ = 3.828 mm-1, F(000) = 4368。络合物 II 具有双核九配位假单封顶方形反三棱构象,其晶体结构属于三linic 系统和 P1 空间群。晶体数据如下:a = 9.7637(16), b = 9.9722(16), c = 12.945(2) Å, α= 85.853(2)°, β= 77.140(2)°, γ = 77.140(2)°, V = 1198.4(3) Å3, Z = 1, M = 1340.80, ρcalcd = 1.858 g cm-3, μ = 3.380 mm-1, F(000) = 674.至于络合物 III,它也是九配位单核结构,具有扭曲的三棱锥,其晶体结构属于单斜体系和 P21/c 空间群。晶体数据如下:a = 10.349(3), b = 12.760(4), c = 23.142(7) Å, β = 91.020(6)°, V = 3055.6(16) Å3, Z = 2, M = 797.55, ρcalcd = 1.734 g cm-3, μ = 2.674 mm-1, F(000) = 1624。结果表明,虽然
配体的形状和配位原子数不同,但它们都具有九配位结构。然而,由于
配体的不同,其中一个具有双核结构,而另外两个具有单核结构。