Dialkyl Rare Earth Complexes Supported by Potentially Tridentate Amidinate Ligands: Synthesis, Structures, and Catalytic Activity in Isoprene Polymerization

	Dialkyl Rare Earth Complexes Supported by Potentially Tridentate Amidinate Ligands: Synthesis, Structures, and Catalytic Activity in Isoprene Polymerization
	Rad'kov VY ; Skvortsov GG ; Lyubov DM ; Cherkasov AV ; Fukin GK ; Shavyrin AS ; Cui DM ; Trifonov AA
刊名	european journal of inorganic chemistry
	2012
期号	13 页码:2289-2297
关键词	MONOANIONIC ANCILLARY LIGANDS YTTRIUM ALKYL COMPLEXES COORDINATION CHEMISTRY OLEFIN POLYMERIZATION ORGANOYTTRIUM CHEMISTRY ETHENE POLYMERIZATION GUANIDINATE LIGANDS MOLECULAR-STRUCTURE METAL-CATALYSTS REACTIVITY
ISSN号	1434-1948
通讯作者	trifonov aa
中文摘要	two new amidines that contain a pendant lewis base in the side arm, 2-meoc6h4nc(tbu)nh(2,6-r2c6h3) (r = me, ipr), were synthesized and successfully employed as tridentate ligands for the preparation of the dialkyl rare earth complexes [2-meoc6h4nc(tbu)n(2,6-r2c6h3)]ln(ch2sime3)2(l)n {ln = y, lu; r = me, ipr; l = thf (n = 2), dme (n = 1)}. these ligands provided enhanced stability for the complexes. the x-ray structure determinations revealed that intramolecular coordination of the 2-meoc6h4 group is realized if a thf molecule is coordinated to the metal center (ln = y, lu), which results in the coordination number of six. the treatment of complex [2-meoc6h4nc(tbu)n(2,6-me2c6h3)]lu(ch2sime3)2(thf) with dme afforded a six-coordinate dme adduct in which the methoxy group of the amidinate ligand has drifted out from the metal coordination sphere. the reaction of [2-meoc6h4nc(tbu)n(2,6-ipr2c6h3)]y(ch2sime3)2(thf) with 2,6-diisopropylaniline in hexane at 70 degrees c, regardless of the ratio of the reagent, afforded the six-coordinate diamido compound [2-meoc6h4nc(tbu)n(2,6-ipr2c6h3)]y(nhc6h3-2,6-ipr2)2(thf), for which intramolecular coordination of the oxygen atom of the side chain was detected by an x-ray study. complex [2-meoc6h4nc(tbu)n(2,6-ipr2c6h3)]y(ch2sime3)2(thf) was evaluated as a precatalyst for isoprene polymerization. the ternary system [2-meoc6h4nc(tbu)n(2,6-ipr2c6h3)]y(ch2sime3)2(thf)/[ph3c][b(c6f5)4]/alibu3provided isoprene polymerization with moderate activity but without control of the regioselectivity (3,4-regularity was slightly predominant at 52?%). nevertheless, high 1,4-trans-selectivity was found (96%) for the 1,4-polyisoprenes. the obtained polyisoprene has a mn of 13.0 x 10(4) and moderate polydispersity (2.12).
收录类别	SCI收录期刊论文
语种	英语
WOS记录号	WOS:000303155200013
公开日期	2013-05-22
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/48193]
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	Rad'kov VY,Skvortsov GG,Lyubov DM,et al. Dialkyl Rare Earth Complexes Supported by Potentially Tridentate Amidinate Ligands: Synthesis, Structures, and Catalytic Activity in Isoprene Polymerization[J]. european journal of inorganic chemistry,2012(13):2289-2297.
APA	Rad'kov VY.,Skvortsov GG.,Lyubov DM.,Cherkasov AV.,Fukin GK.,...&Trifonov AA.(2012).Dialkyl Rare Earth Complexes Supported by Potentially Tridentate Amidinate Ligands: Synthesis, Structures, and Catalytic Activity in Isoprene Polymerization.european journal of inorganic chemistry(13),2289-2297.
MLA	Rad'kov VY,et al."Dialkyl Rare Earth Complexes Supported by Potentially Tridentate Amidinate Ligands: Synthesis, Structures, and Catalytic Activity in Isoprene Polymerization".european journal of inorganic chemistry .13(2012):2289-2297.