ICCAS OpenIR
Transition metal acetylide catalysts for polymerization of alkynes 3. Polymerization mechanism
Zhan, XW; Yang, MJ
2001-03-28
Source PublicationJOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
ISSN1381-1169
Volume169Issue:1-2Pages:57-62
AbstractA 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.
KeywordTransition Metal Acetylide Catalyst Alkyne Polymerization Mechanism
Indexed BySCI
Language英语
WOS IDWOS:000167803100008
PublisherELSEVIER SCIENCE BV
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Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/77784
Collection中国科学院化学研究所
Corresponding AuthorZhan, XW
Affiliation1.Zhejiang Univ, Dept Polymer Sci & Engn, Hangzhou 310027, Peoples R China
2.Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China
Recommended Citation
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.
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