Synthesis of Heterocyclic-Fused Cyclopentadienyl Scandium Complexes and the Catalysis for Copolymerization of Ethylene and Dicyclopentadiene

	Synthesis of Heterocyclic-Fused Cyclopentadienyl Scandium Complexes and the Catalysis for Copolymerization of Ethylene and Dicyclopentadiene
	Chen,Runhai; Yao,Changguang; Wang,Meiyan; Xie,Hongyan; Wu,Chunji; Cui,Dongmei
刊名	organometallics
	2015
卷号	34 期号:2 页码:455-461
关键词	ALPHA-OLEFIN POLYMERIZATION SYNDIOSPECIFIC STYRENE POLYMERIZATION CONSTRAINED-GEOMETRY CATALYST HALF-SANDWICH COMPLEXES EARTH-METAL PRECURSORS ISOTACTIC POLYPROPYLENE AMINOBENZYL COMPLEXES ALKYL CATALYSTS CYCLIC DIENES DONOR LIGAND
通讯作者	wu,cj
英文摘要	heterocyclic-fused cyclopentadienyl scandium bis(alkyl) complexes l1-4sc(ch2sime3)(2)thf ((5-me-1-ph-cyclopenta[b]pyrrol-4-yl)sc(ch2sime3)(2)thf (1), (2,5-me-2-3-ph-6h-cyclopenta[b]thiophenyl)sc(ch2sime3)(2)thf (2), (2,4,5,6-me-4-4h-cyclopenta[b]thiophenyl)sc(ch2sime3)(2)thf (3), (2,3,4,5,6-me-5-4h-cyclopenta[b]thiophenyl)sc(ch2sime3)(2)thf) (4)) were facilely synthesized by alkane elimination reaction of sc(ch2sime3)3(thf)2 with the heterocyclic-fused cyclopentadienyl ligands hl1-4 in high yields. complexes 1-4 were characterized by h-1 and c-13 nmr spectroscopies and x-ray diffraction analyses as thf-solvated monomers, adopting a half-sandwich geometry. upon activation of [ph3c][b(c6f5)(4)]/alibu(3), these half-sandwich scandium complexes displayed various activities toward the copolymerization of ethylene (e) and dicyclopentadiene (dcpd). complex 1, supported by the phenyl-substituted pyrrole-fused cyclopentadienyl ligand, showed a slightly higher activity than the phenyl-substituted thiophene-fused cyclopentadienyl complex 2. among the thiophene-fused cyclopentadienyl complexes 2-4, 4, bearing pentamethyl substituents, showed the highest activity of 2.9 x 10 (6) g/molsc.h.bar. the resultant copolymers had adjustable dcpd incorporation varying from 14.0 up to 46.1 mol %, of which the alternating poly(e-alt-dcpd) had a high tg of 166 degrees c. in addition, no cross-linking was observed in the copolymers, suggesting that these catalytic systems were highly regioselective for the two active double bonds within dcpd.
收录类别	SCI
语种	英语
公开日期	2016-05-31
内容类型	期刊论文
源URL	[http://ir.ciac.jl.cn/handle/322003/65180]
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	Chen,Runhai,Yao,Changguang,Wang,Meiyan,et al. Synthesis of Heterocyclic-Fused Cyclopentadienyl Scandium Complexes and the Catalysis for Copolymerization of Ethylene and Dicyclopentadiene[J]. organometallics,2015,34(2):455-461.
APA	Chen,Runhai,Yao,Changguang,Wang,Meiyan,Xie,Hongyan,Wu,Chunji,&Cui,Dongmei.(2015).Synthesis of Heterocyclic-Fused Cyclopentadienyl Scandium Complexes and the Catalysis for Copolymerization of Ethylene and Dicyclopentadiene.organometallics,34(2),455-461.
MLA	Chen,Runhai,et al."Synthesis of Heterocyclic-Fused Cyclopentadienyl Scandium Complexes and the Catalysis for Copolymerization of Ethylene and Dicyclopentadiene".organometallics 34.2(2015):455-461.