beta-Diketiminato Rare-Earth Metal Complexes. Structures, Catalysis, and Active Species for Highly cis-1,4-Selective Polymerization of Isoprene

	beta-Diketiminato Rare-Earth Metal Complexes. Structures, Catalysis, and Active Species for Highly cis-1,4-Selective Polymerization of Isoprene
	Li DF ; Li SH ; Cui DM ; Zhang XQ
刊名	organometallics
	2010
卷号	29 期号:9 页码:2186-2193
关键词	SEPARATED ION-PAIRS 1 METHYL-METHACRYLATE 3-BUTADIENE POLYMERIZATION MOLECULAR-STRUCTURES BOROHYDRIDE COMPLEXES EPSILON-CAPROLACTONE STEREOSPECIFIC POLYMERIZATION ALTERNATING COPOLYMERIZATION REACTIVE ORGANOLANTHANIDES DIALKYLSCANDIUM COMPLEXES
ISSN号	0276-7333
通讯作者	cui dm
中文摘要	lithiation of the beta-diketimines (2,6-c6h3r2)nh=c(me)ch=c(me)n(2,6-c6h3r2) (r = me (hl1), et (hl2)) by nbuli was followed by metathesis reaction with lncl(3)(thf)(x) and y(bh4)(3)(thf)(2) to afford the corresponding complexes l(1)lncl(2)(thf)(2) (ln = gd (1), nd (3), dy (4), er (5), y (6)), (lgdcl2)-gd-2(thf)2 (2), and (ly)-y-1(bh4)(2)(thf) (8), respectively. treatment of neutral hl1 with y(ch2sime3)(3)(thf)(2) generated the bis(alkyl) complex 7, (ly)-y-1(ch2sime3)(2)-(thf). upon activation with [phnhme2][b(c6f5)(4)] and alibu(3), complex 6 showed the highest cis1,4 selectivity (99.3%, t-p = 0 degrees c) toward the polymerization of isoprene, while complex 7 had a comparatively low cis-1,4 selectivity, and in contrast, complex 8 was completely inert. the influences of the ortho substituents of the n-aryl rings of the ligands, the types of central metals and cocatalysts, and addition sequence of the catalyst components had been thoroughly investigated. by means of x-ray diffraction and h-1 nmr spectroscopy analyses, the intermediates arising from the stoichiometric reactions among the catalyst components and the probable active species were elucidated, which facilitates further investigation of the mechanism for diene polymerization.
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000277212300027
公开日期	2012-06-06
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/43749]
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	Li DF,Li SH,Cui DM,et al. beta-Diketiminato Rare-Earth Metal Complexes. Structures, Catalysis, and Active Species for Highly cis-1,4-Selective Polymerization of Isoprene[J]. organometallics,2010,29(9):2186-2193.
APA	Li DF,Li SH,Cui DM,&Zhang XQ.(2010).beta-Diketiminato Rare-Earth Metal Complexes. Structures, Catalysis, and Active Species for Highly cis-1,4-Selective Polymerization of Isoprene.organometallics,29(9),2186-2193.
MLA	Li DF,et al."beta-Diketiminato Rare-Earth Metal Complexes. Structures, Catalysis, and Active Species for Highly cis-1,4-Selective Polymerization of Isoprene".organometallics 29.9(2010):2186-2193.