Synthesis and Structural Characterization of Mixed-Valent Ytterbium and Europium Complexes Supported by a Phenoxy(quinolinyl)amide Ligand

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• 作者：Yinyin Jiang ; Xi Zhu ; Muzi Chen ; Yaorong Wang ; Yingming Yao ; Bing Wu ; Qi Shen
• 刊名：Organometallics
• 出版年：2014
• 出版时间：April 28, 2014
• 年：2014
• 卷：33
• 期：8
• 页码：1972-1976
• 全文大小：293K
• 年卷期：v.33,no.8(April 28, 2014)
• ISSN：1520-6041

文摘

The formation of mixed-valent ytterbium and europium complexes L₄Ln^III₂Ln^II (Ln = Yb (1), Eu (2)) was observed for the first time in the spontaneous reduction reaction system of quinolinyl aminophenol (H₂L) with Ln[N(SiMe₃)₂]₃ (Ln = Yb, Eu) in toluene at 90 掳C, whereas the same reaction with Sm[N(SiMe₃)₂]₃ gave the expected monoamido samarium complex LSmN(SiMe₃)₂(DME) (4). The isolation of the binuclear ytterbium complex L₃Yb₂ (3) under mild conditions demonstrates that the transformation from a trivalent ytterbium complex to the mixed-valent ytterbium species 1 may involve a ligand redistribution reaction and homolysis of the Yb鈥揘 bond.