1,2-Azaborolyl-Ligated Titanium(IV) Half-Metallocenes: Synthesis, Characterization, and Catalytic Activity in Ethylene Polymerization
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- 作者：Yang Chen ; Xiangdong Fang ; Wenyan Dan
- 刊名：Organometallics
- 出版年：2016
- 出版时间：January 11, 2016
- 年：2016
- 卷：35
- 期：1
- 页码：15-19
- 全文大小：295K
- ISSN：1520-6041
文摘
The synthesis and characterization of 1,2-azaborolyl (Ab)-ligated titanium(IV) half-metallocene complexes are presented, and their catalytic properties in ethylene polymerization have been evaluated. Mono-Ab TiCl3 complexes 3 and 4 can be conveniently converted to other half-metallocene derivatives (5–8) in moderate to good yields. The molecular structures of titanium complexes 3–8 have been determined by X-ray diffraction analysis. Upon activation with methylaluminoxanes (MAO), mono-Ab Ti half-metallocenes demonstrated high catalytic activity in ethylene polymerization (1.50 × 107 g of PE (mol of Ti)?1 h–1) at a low [MAO] (Al:Ti = 30) .