Synthesis, Structures, and Polymerization Catalytic Properties of Doubly Bridged Bis(cyclopentadienyl) Dinuclear (μ-Oxo)titanium Complexes

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• 作者：Shuang Luo ; Bo Shen ; Bin Li ; Haibin Song ; Shansheng Xu ; Baiquan Wang
• 刊名：Organometallics
• 出版年：2009
• 出版时间：May 25, 2009
• 年：2009
• 卷：28
• 期：10
• 页码：3109-3112
• 全文大小：139K
• 年卷期：v.28,no.10(May 25, 2009)
• ISSN：1520-6041

文摘

The doubly bridged dinuclear (μ-oxo)titanium complex (Me₂C)(Me₂Si)(C₅H₃)₂(μ-O)(CpTiCl)₂ (1) was synthesized by the reaction of the lithium compound of the doubly bridged bis(cyclopentadienyl) ligand with (CpTiCl₂)₂O. Treatment of 1 with concentrated HCl or HBr gave the corresponding Cp-decoordinated products (Me₂C)(Me₂Si)(C₅H₃)₂[CpTiX(μ-O)TiX₂] (X = Cl (2), Br (3)). All these titanium complexes were characterized by ¹H NMR, ¹³C NMR, MS spectra, and elemental analysis. The crystal structures of (CpTiCl₂)₂O, 1, and 3 were determined by X-ray diffraction. Their catalytic properties for ethylene polymerization were also studied in the presence of MAO.