Transition Metal Carbonyl Catalysts for Polymerizations of Substituted Acetylenes
| Autor: | Jacky Wing Yip Lam, Yuping Dong, Han Peng, Priscilla Pui Sze Lee, T.W.H. Poon, Qunhui Sun, Kaitian Xu, Ben Zhong Tang, Hongyao Xu, Kevin Ka Leung Cheuk, Fouad Salhi |
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| Rok vydání: | 2000 |
| Předmět: | |
| Zdroj: | Macromolecules. 33:6918-6924 |
| ISSN: | 1520-5835 0024-9297 |
| DOI: | 10.1021/ma000843a |
| Popis: | Most of the existing metal carbonyl catalysts for acetylene polymerizations need to be preactivated by chlorine-containing additives or by UV irradiation in halogenated solvents. In this work, we developed a series of “simple” metal carbonyl catalysts of general structure M(CO)xLy (M = Mo, W), none of which require additives or pre-photoirradiation, most of which are air- and moisture-stable, and some of which work well in nonhalogenated solvents. The acetonitrile complexes M(CO)3(NCCH3)3 initiated polymerizations of a variety of mono- and disubstituted acetylenes at room temperature. The arene and diene complexes W(CO)3(mes) and Mo(CO)3(nbd) (mes = mesitylene, nbd = 2,5-norbornadiene) are tolerant of polar groups and effected polymerizations of functional acetylenes containing ester, ether, and cyano groups. The halogenated complexes MI2(CO)3(NCCH3)2 catalyzed polymerizations of phenylacetylene in toluene. The chlorine-containing acetylene monomers ClC⋮CC6H5 and ClC⋮CC6H13 were readily polymerized by the... |
| Databáze: | OpenAIRE |
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