化学学报 ›› 1996, Vol. 54 ›› Issue (11): 1084-1088. 上一篇    下一篇

研究论文

镧系金属有机配合物研究LX: 含碳、氮稀土金属σ键的稀土金属有机配合物的合成和表征

钱长涛;王兵   

  1. 中国科学院上海有机化学研究所;中国科学院金属有机化学开放实验室
  • 发布日期:1996-11-15

Studies on organolanthanide complexes LX: Synthesis and characterization of organolanthanide complexes containing Ln-C or Ln-N σ bonds

QIAN CHANGTAO;WANG BING   

  • Published:1996-11-15

双(2-甲氧乙基环戊二烯基)氯化镧或氯化镱, 在四氢呋喃中, -20℃下,分别与苯乙炔基钠发生交换反应, 生成双(2-甲氧乙基环戊二烯基)苯乙炔基镧或镱, 产率分别为77%和66%。直接将无水三氯化镱或三氯化钇, 在四氢呋喃中, 冰水冷却下, 与两摩尔的双(三甲基甲硅烷基)氨基锂和2-甲氧乙基环戊二烯基钠进行一锅煮反应, 可得2-甲氧乙基环戊二烯基双(双三甲基甲硅烷基氨基)镱或钇, 产率分别为56%和72%。配合物经元素分析, 红外光谱, 核磁共振氢谱和质谱的鉴定, 它们可能是非溶剂化的, 含分子内配位键的中性单体配合物。

关键词: 红外分光光度法, 元素分析, 质谱法, 环戊二烯 P, 镧系金属, 氯化钇, 核磁共振氢谱, 氯化镧, 氯化镱, 有机络合物

The new Ln-C σ-bond complexes bis(2-methoxyethylcyclopentadienyl) alkynyl lanthanum and ytterbium have been synthesized respectively by the displacing reaction of bis(2-methoxyethylcyclopentadienyl) lanthanide chlorides (Ln=La, Yb) with sodium alkynyl in THF at -20℃ with 77% and 66% yields. The new Ln-N σ-bond complexes (2-methoxyethylcyclopentadienyl) bis(bis-trimethylsilyl amido) ytterbium or yttrium were directly prepared by the one-pot reaction of sodium 2-methoxyethylcyclopentadienyl, lithium bis-trimethylsilyl amido and ytterbium or yttrium trichlorides at 0-5℃ with 56% and 72% yields, respectively. These complexes have been characterized by elemental analysis, IR, MS, and ^1H NMR spectra. They may be neutral and unsolvated monomers with the intramolecular coordination bonds between lanthanide metal and ligand oxygen atoms.

Key words: INFRARED SPECTROPHOTOMETRY, ELEMENTAL ANALYSIS, MASS SPECTROGRAPHY, CYCLOPENTADIENE P, LANTHANIDE SERIES METALS, YTTRIUM CHLORIDE, LANTHANUM CHLORIDE, YTTERBIUM CHLORIDE

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