Highly active half-sandwich chromium(III) catalysts bearing bis(imino)pyrrole ligands for ethylene (co) polymerization

	Highly active half-sandwich chromium(III) catalysts bearing bis(imino)pyrrole ligands for ethylene (co) polymerization
	Liu, Jing-Yu ; Tao, Ping ; Wang, Yong-Xia ; Li,Yue-Sheng
刊名	rsc advances
	2014
卷号	4 期号:37 页码:19433-19439
关键词	MOLECULAR-WEIGHT POLYETHYLENE IMINE CHELATE LIGANDS OLEFIN POLYMERIZATION RADICAL POLYMERIZATION TITANIUM COMPLEXES BLOCK-COPOLYMERS OLIGOMERIZATION BEHAVIOR ACTIVATION ZIRCONIUM
通讯作者	li,ys
英文摘要	a series of half-sandwich cr(iii) complexes bearing bis(imino) pyrrole ligands,cp '[2,5-c4h2n(ch=nar)(2)] crcl [cp ' = c5h5, ar = c6h5 (2a), 2,6-me2c6h3 (2b), 2,6-(pr2c6h3)-pr-i (2c), c6f5 (2d); cp ' = c5me5, ar c6h5 (3a), 2,6-(pr2c6h3)-pr-i (3c)] were synthesized with good yields. the complexes were characterized by ftir and mass spectrometry in addition to elemental analyses. x-ray structural analyses for 2a-c showed that the cr complexes have a pseudo-octahedral coordination environment with a three-legged "piano stool" geometry. one of the imino nitrogen atoms is coordinated with the cr metal. on activation with methylaluminoxane, the cp-based complexes showed high catalytic activities for ethylene polymerization. high molecular weight polymers with unimodal molecular weight distributions were obtained, indicating that the nature of the polymerization was single site. the copolymerization of ethylene with norbornene by the pre-catalysts 2a-d was also explored in the presence of methylaluminoxane. the catalytic activity, co-monomer incorporation and the properties of the resultant polymers can be controlled over a wide range by tuning the catalyst structures and reaction parameters.
收录类别	SCI
语种	英语
公开日期	2015-10-27
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/57262]
专题	长春应用化学研究所_长春应用化学研究所知识产出_期刊论文
推荐引用方式 GB/T 7714	Liu, Jing-Yu,Tao, Ping,Wang, Yong-Xia,et al. Highly active half-sandwich chromium(III) catalysts bearing bis(imino)pyrrole ligands for ethylene (co) polymerization[J]. rsc advances,2014,4(37):19433-19439.
APA	Liu, Jing-Yu,Tao, Ping,Wang, Yong-Xia,&Li,Yue-Sheng.(2014).Highly active half-sandwich chromium(III) catalysts bearing bis(imino)pyrrole ligands for ethylene (co) polymerization.rsc advances,4(37),19433-19439.
MLA	Liu, Jing-Yu,et al."Highly active half-sandwich chromium(III) catalysts bearing bis(imino)pyrrole ligands for ethylene (co) polymerization".rsc advances 4.37(2014):19433-19439.