Organoaluminum Hydroxides Supported by β-Diketiminato Ligands: Synthesis, Structural Characterization, and Reactions

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• 作者：Ying Yang ; Thomas Schulz ; Michael John ; Zhi Yang ; Victor Manuel Jim&#xe9 ; nez-P&#xe9 ; rez ; Herbert W. Roesky ; Prabhuodeyara M. Gurubasavaraj ; Dietmar Stalke ; Hongqi Ye
• 刊名：Organometallics
• 出版年：2008
• 出版时间：February 25, 2008
• 年：2008
• 卷：27
• 期：4
• 页码：769 - 777
• 全文大小：557K
• 年卷期：v.27,no.4(February 25, 2008)
• ISSN：1520-6041

文摘

Three β-diketiminato ligands (L¹ = HC[C(Me)N(Ar)]₂, Ar = 2,4,6-Me₃C₆H₂; L² = HC[C(Me)N(Ar)]₂, Ar = 2,6-iPr₂C₆H₃; L³ = HC[C(tBu)N(Ar)]₂, Ar = 2,6-iPr₂C₆H₃) were employed to prepare the organoaluminum hydroxides LAlR(OH) (R = Me, Et, Ph, OEt, OSiMe₃) by hydrolysis of the corresponding chlorides in the presence of a N-heterocyclic carbene as HCl scavenger. Reaction of the organoaluminum hydroxide with Cp₂ZrMe₂ in toluene afforded the heterobimetallic oxide LAlR(μ-O)ZrMeCp₂ under evolution of methane. All compounds were characterized by multinuclear NMR, IR, mass spectrometry, and elemental analysis. The structures of L¹AlPh(OH) (10), L²AlPh(OH) (11), L²AlOEt(OH) (12), L²AlOSiMe₃(OH) (13), and L²AlPh(μ-O)ZrMeCp₂ (17) were determined by single-crystal X-ray diffraction studies. The polymerization of ethylene was studied with compound 17, which exhibits moderate catalytic activity.