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Stereospecific living polymerization, acetylenes catalysts

Well-controlled polymerization of substituted acetylenes was also reported. A tetracoordinate organorhodium complex induces the stereospecific living polymerization of phenylacetylene.600 The polymerization proceeds via a 2-1 -insertion mechanism to provide stereoregular poly(phenylacetylene) with m-transoidal backbone structure. Rh complexes were also used in the same process in supercritical C02601 and in the polymerization of terminal alkyl- and arylacetylenes.602 Single-component transition-metal catalysts based on Ni acetylides603 and Pd acet-ylides604 were used in the polymerization of p-diethynylbenzene. [Pg.784]

In these two decades remarkable progress has been made in the development of excellent catalysts for living and stereospecific acetylene polymerizations (10,26-28). The r-conjugated polymers prepared by the sequential polsrmerization are strictly limited to polyacetylenes, except for only a few examples. Thus, synthesis of tailor-made conjugated macromolecules such as end-functionalized polymers, block copolymers, star-shaped polymers is possible only in the case of substituted acetylenes. [Pg.18]

Among a number of transition metal catalysts for polymerization of acetylenes, Rh catalysts can be classified as the most excellent one in terms of both stereospecificity and living... [Pg.888]


See other pages where Stereospecific living polymerization, acetylenes catalysts is mentioned: [Pg.576]    [Pg.886]    [Pg.577]    [Pg.976]    [Pg.98]    [Pg.947]    [Pg.397]    [Pg.402]   
See also in sourсe #XX -- [ Pg.11 ]




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Acetylene catalysts

Catalysts polymerizing

Catalysts stereospecific polymerization

Living catalysts

Living polymerization

Living polymerization acetylenes

Living polymerization catalysts

Polymerized acetylene

Stereospecific catalyst

Stereospecific living polymerization, acetylenes

Stereospecific polymerizations

Stereospecific polymerizations polymerization

Stereospecific polymerizations stereospecificity

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