Transition metal acetylide catalysts for polymerization of alkynes 3. Polymerization mechanism

CORC > 化学研究所 > 中国科学院化学研究所

	Transition metal acetylide catalysts for polymerization of alkynes 3. Polymerization mechanism
	Zhan, XW ; Yang, MJ
刊名	JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
	2001-03-28
卷号	169 期号:1-2 页码:57-62
关键词	Transition Metal Acetylide Catalyst Alkyne Polymerization Mechanism
ISSN号	1381-1169
英文摘要	A coordination insertion mechanism is proposed for the polymerization of alkynes initiated by transition metal acetylides on the basis of some experimental results. A transition metal acetylide coordinates with an alkyne resulting in the formation of a penta-coordinated complex, which is a preliminary activation and rate-determining step. The polymeric chain begins by insertion of the pi -coordinated monomer molecule into the metal-carbon sigma -bond. For large-bulk monomers such as p-diethynylbenzene and its derivatives, the insertion is almost trans-type to give rich trans polymers. On the other hand, for small-bulk monomers such as phenylacetylene, cis insertion easily occurs to yield cyclotrimers. The propagation of the polymer chain can be interrupted when the sigma -bonded monomer transfers its acidic hydrogen to the growing chain. (C) 2001 Elsevier Science B.V. All rights reserved.
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000167803100008
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/77783]
专题	中国科学院化学研究所
通讯作者	Zhan, XW
作者单位	1.Zhejiang Univ, Dept Polymer Sci & Engn, Hangzhou 310027, Peoples R China 2.Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Zhan, XW,Yang, MJ. Transition metal acetylide catalysts for polymerization of alkynes 3. Polymerization mechanism[J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,2001,169(1-2):57-62.
APA	Zhan, XW,&Yang, MJ.(2001).Transition metal acetylide catalysts for polymerization of alkynes 3. Polymerization mechanism.JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,169(1-2),57-62.
MLA	Zhan, XW,et al."Transition metal acetylide catalysts for polymerization of alkynes 3. Polymerization mechanism".JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL 169.1-2(2001):57-62.