中华医学超声杂志

应用化学 ›› 1991, Vol. 0 ›› Issue (1): 23-27.

• 研究论文 • 上一篇    下一篇

[Li3DME][(η5-C5H5)3Nd(μ-H)Nd(η5-C5H5)3]的合成及其分子结构

孙益民, 沈琪, 金松春, 林永华   

  1. 中国科学院长春应用化学研究所稀土化学与物理开放实验室, 长春 130022
  • 收稿日期:1989-11-30 修回日期:1990-05-15 出版日期:1991-02-10 发布日期:1991-02-10

SYNTHESIS AND MOLECULAR STRUCTURE OF[Li3DME][(η5-C5H5)3Nd(μ-H)Nd(η5-C5H5)3]

Sun Yimin, Shen Qi, Jin Songchun, Lin Yonghua   

  1. Laboratory of Rare-earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Academia Sinica, Changchun 130022
  • Received:1989-11-30 Revised:1990-05-15 Published:1991-02-10 Online:1991-02-10

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摘要： 标题配合物是以THF作溶剂,通过(C5H5)2NdCl·ZLiCl和甲基萘钠的还原反应合成的。其晶体属单斜晶系,P2/c空间群,晶胞参数a=9.235(2)Å,b=11.695(2)Å,c=20.810(3)Å,β=92.88(1)°,Z=2。研究结果表明,标题配合物由相互不相联的〔Li3DME〕+和〔(η5-C5H5)3Nd(μ-H)Nd(η5-C5H5)3〕-离子对组成。阳离子中,Li原子与由3个DME提供的6个O原子配位,形成八面体构型,Li—O平均键长为2.116Å;阴离子中,2个Nd原子不直接键合,系通过桥H联接,Nd—H=2.19Å。此外,每个Nd原子各有3个C5H5-与之配位,Nd—C平均键长为2.812Å。

关键词: 轻稀土, 轻稀土有机氢化物, 合成, 结构

Abstract: The title complex was synthesized by reaction of (C5H5)2NdCl·2LiCl with sodiumnaphthalene in THF.The crystals of the complex belong to monoclinic, space group P 2/c with cell dimensions: a = 9.235(2), b = 11.695(2), c = 20.810(3)Å,β = 92.88(1)°and Z = 2.The x-ray structural analysis shows that the title complex consists of ion pairs:(Li3DME)+ and [(η5-C5H5)3Nd(μ-H) Nd(η5-C5H5)3]-.In the cation species Li atom iscoordinated by six O atoms offered from three DME, forming a six-coordinated octahedronstructure with average Li-O = 2.116Å.In the anion the two Nd atoms do not bond directly,they are linked through the bridged H, Nd-H = 2.19Å.Furthermore, each Nd atom issurrounded dy three cyclopentadienyl (C5H5)-, and the average Nd-C bond length is 2.812Å.

Key words: light lanthanoid, organohydride, synthesis, structure

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