Dramatic electronic effect of fluoro substituents on the olefin polymerization activity of mono beta-diiminato titanium complexes

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	Dramatic electronic effect of fluoro substituents on the olefin polymerization activity of mono beta-diiminato titanium complexes
	Xie GY(谢光勇) ; Qian ZT(钱长涛)
刊名	J. Polym. Sci. Pol. Chem.
	2008
卷号	46 期号:1 页码:211-217
ISSN号	0887-624X
其他题名	Dramatic electronic effect of fluoro substituents on the olefin polymerization activity of mono beta-diiminato titanium complexes
通讯作者	谢光勇
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.
学科主题	金属有机化学 ; 有机氟化学
收录类别	SCI
原文出处	http://dx.doi.org/10.1002/pola.22373
语种	英语
WOS记录号	WOS:000251980900022
公开日期	2013-01-22
内容类型	期刊论文
源URL	[http://202.127.28.38/handle/331003/15301]
专题	上海有机化学研究所_金属有机化学国家重点实验室
推荐引用方式 GB/T 7714	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.
APA	谢光勇,&钱长涛.(2008).Dramatic electronic effect of fluoro substituents on the olefin polymerization activity of mono beta-diiminato titanium complexes.J. Polym. Sci. Pol. Chem.,46(1),211-217.
MLA	谢光勇,et al."Dramatic electronic effect of fluoro substituents on the olefin polymerization activity of mono beta-diiminato titanium complexes".J. Polym. Sci. Pol. Chem. 46.1(2008):211-217.