Synthesis, structural characterization, and reactivity of the ethyl substituted aluminum hydroxide and catalytic properties of its derivative

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• 作者：Ying Yang ; Prabhuodeyara M. Gurubasavaraj ; Hongqi Ye ; Zhensheng Zhang ; Herbert W. Roesky ; Peter G. Jones
• 关键词：Aluminum hydroxide ; Heterobimetallic oxide ; β ; -Diketiminato ligand ; Lanthanide ; Polymerization
• 刊名：Journal of Organometallic Chemistry
• 出版年：2008
• 出版时间：15 April 2008
• 年：2008
• 卷：693
• 期：8-9
• 页码：1455-1461
• 全文大小：404 K

文摘

The ethyl substituted aluminum hydroxide LAlEt(OH) (2; L = HC[C(Me)N(Ar)]₂; Ar = 2,6-iPr₂C₆H₃) was prepared by the hydrolysis of LAlEt(Cl) (1) in the presence of a N-heterocyclic carbene. The reaction of 2 with Cp₂ZrMe₂ in toluene afforded LAlEt(μ-O)ZrMeCp₂ (3) by evolution of methane, while the reaction of 2 with Cp₃M in THF led to the intermolecular elimination of HCp and formation of LAlEt(μ-O)M(THF)Cp₂ (M = Yb, 4; Er, 5; Dy, 6; Y, 7). Compounds 2 and 3 were characterized by single X-ray structural analysis. Compound 2 crystallizes in the orthorhombic space group P2₁2₁2₁, while compound 3 crystallizes in space group Pnma. In both cases, the displacement of the Al and the γ-C atom out of the NCCN plane is observed in a boat conformation, but with converse direction. Furthermore, compound 3 was used as catalyst for ethylene polymerization.