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学科主题: 金属有机化学 ; 有机氟化学
题名: Dramatic electronic effect of fluoro substituents on the olefin polymerization activity of mono beta-diiminato titanium complexes
其他题名: Dramatic electronic effect of fluoro substituents on the olefin polymerization activity of mono beta-diiminato titanium complexes
作者: Xie GY(谢光勇) ; Qian ZT(钱长涛)
通讯作者: 谢光勇
刊名: J. Polym. Sci. Pol. Chem.
发表日期: 2008
卷: 46, 期:1, 页:211-217
收录类别: SCI
部门归属: 上海有机所
英文摘要: A series of new mono beta-diiminato titanium complexes [(N(Ar)C(CH3))(2) CH]TiCl3 (3a: Ar = 2.6-F2C6H3; 3b: Ar = C6F5; 3c: Ar = 2.6-Me2C6H3) have been synthesized and characterized. The crystal structure of 3a revealed that the fl-diiminato ligand in our complex is more close to the eta(2)-coordination mode with little delocalization of the double bonds, which is different from the strong delocalization in the ligands of eta(5)-coordinated (Tolnacnac)TiCl3 and eta(2-)coordinated (Dipnacnac)ZrCl3. The significant electronic effects of fluoro-substituents on the olefin polymerization activity of mono beta-diiminato titanium complexes were found. Titanium complexes with fluorine-containing beta-diiminato ligands, on activation with MMAO, are extremely active catalysts for polymerization of ethylene. The activity of copolymerization of ethylene and 1-hexene is higher than homopolymerization of ethylene and increases with the increase of 1-hexene concentrations, which show the positive "comonomer effect." The molar percentage of 1-hexene incorporation and polymer microstructures can also be modulated by the initial comonomer concentrations. (c) 2007 Wiley Periodicals, Inc.
语种: 英语
相关网址: 查看原文
WOS记录号: WOS:000251980900022
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内容类型: 期刊论文
URI标识: http://ir.sioc.ac.cn/handle/331003/15301
Appears in Collections:金属有机化学国家重点实验室_期刊论文

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Recommended Citation:
Xie GY,Qian ZT. Dramatic electronic effect of fluoro substituents on the olefin polymerization activity of mono beta-diiminato titanium complexes[J]. J. Polym. Sci. Pol. Chem.,2008,46(1):211-217.
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