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• 作者：Yingming Yao ; Mengtao Ma ; Xiaoping Xu ; Yong Zhang ; Qi Shen ; and Wing-Tak Wong
• 刊名：Organometallics
• 出版年：2005
• 出版时间：August 1, 2005
• 年：2005
• 卷：24
• 期：16
• 页码：4014 - 4020
• 全文大小：177K
• 年卷期：v.24,no.16(August 1, 2005)
• ISSN：1520-6041

文摘

A series of amine bis(phenolato)lanthanide methyl and amido complexes were synthesizedby general salt metathesis reaction in this paper. The reaction of anhydrous lanthanidetrichlorides with 1 equiv of sodium amine bis(phenolate) LNa₂ [L = Me₂NCH₂CH₂N{CH₂-(2-O-C₆H₂-Bu^t₂-3,5)}₂] in THF at room temperature gave the amine bis(phenolate) lanthanidechlorides LLnCl(THF) (Ln = Yb (1), Ln = Er (2)). Complexes 1 and 2 can be used as startingmaterials to prepare amine bis(phenolate) lanthanide derivatives. Complexes 1 and 2 reactedwith lithium methyl and lithium amide, respectively, to give the corresponding lanthanidemethyl and amido products LLnMe(THF) (Ln = Yb (3), Ln = Er (4)) and LLnNPh₂(THF)(Ln = Yb (5), Ln = Er (6)). These complexes were well characterized by elemental analysesand IR spectra. The definitive molecular structures of complexes 1, 2, 3, 5, and 6 wereprovided by single-crystal X-ray analyses. Reactivity studies of complexes 3, 5, and 6 haveshown them to be efficient initiators for the ring-opening polymerization of -caprolactone.