| 希土季铵盐配合物的研究——Ⅴ.[(n-C4H9)4N]3Nd(NCS)6的晶体结构研究 |
| STUDIES ON RARE EARTH COMPLEXES OF QUATERNARY AMMONIUM SALT V. CRYSTAL AND MOLECULAR STRUCTURE OF TETRABUTYL AMMONIUM HEXAISO-THIOCYANATO NEODYMIUM [(C4H9)4N]3Nd(NCS)6 |
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| 摘要: 合成了硫氰酸合希土酸四丁基季铵盐配合物,测定了它们的远红外光谱及部分配合物的中红外光谱,结果表明,配合物中的NCS-是以氮原子与Ln3+配位。用X射线单晶衍射法测定了[(n-C4H9)4N]3Nd(NCS)6晶体的结构,结果表明,该晶体属单斜晶系,Cc空间群,晶胞参数为:a=25.188(8)Å,b=13.320(6)Å,c=25.322(8)Å,β=121.30(2)°,晶胞体积V=7258.9Å3,每一晶胞中有四个配合物分子,中心离子Nd3+与六个来自NCS-的氮原子配位,这六个氮位于配位正八面体的六个顶角上,构成配阴离子Nd(NCS)63-,它与三个[(n-C4H9)4N]+以静电引力结合成中心分子,所以晶体为离子型晶体。 |
| 关键词: 希土配合物 结构 合成 硫氰酸合希土酸四丁基季铵盐 |
| 基金项目: 国家自然科学基金委员会 |
| Abstract: The complexes of tetrabutyl ammonium hcxaisothiocyanato rare earths, have been synthesized. The crystal and molecular structure of [(n-C4H9)4N]3Nd(NCS)6 has been determined by single crystal X-ray diffraction techniques with a four circle diffractometer to a final R value of 0.12. The crystal is monoclinic with space group Cc. The unit cell parameters are: a=25.188(8)Å, b= 13.320(6)Å, c=25.322(8)Å, β=121.30(2)°, Z= 4, V=7258.9Å3, dcalc.=1.114g/cm3. The neodymium atom is coordinated by six nitrogen atoms from six isothiocyanate groups to form a complex anion, in which the nitrogen atoms take a distorted octahedron arrangement. The anion is counterbalanced by three [(C4H9)4N]+ cations in the outersphere of the complex through electrostatic attraction to form an ionic crystal. The average bond length of Nd-N is 2.432(20)Å.The infrared spectra of this, series of complexes have been determined and discussed as well. |
| Keywords: rare earth complex structure synthesis telrabutyl ammonium hexaisothiocyanato rare earth |
| 投稿时间：1989-10-18 |
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| 李俊然,黄春辉,许振华,徐光宪,贺存恒,郑启泰.希土季铵盐配合物的研究——Ⅴ.[(n-C4H9)4N]3Nd(NCS)6的晶体结构研究[J].无机化学学报,1992,8(1):49-53. |
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