Iridium-catalyzed formation of trans-polyphenylacetylene by alkyne polymerization
| Autor: | Mauro Marigo, Nazario Marsich, Dunja Millos, Erica Farnetti |
|---|---|
| Přispěvatelé: | Marigo, M, Millos, D, Marsich, N, Farnetti, Erica |
| Rok vydání: | 2003 |
| Předmět: |
chemistry.chemical_classification
Reaction mechanism Stereochemistry Process Chemistry and Technology Alkyne chemistry.chemical_element Homogeneous catalysis Medicinal chemistry Catalysis chemistry.chemical_compound Stereospecificity chemistry Phenylacetylene Polymerization Iridium Physical and Theoretical Chemistry |
| Zdroj: | Journal of Molecular Catalysis A: Chemical. 206:319-329 |
| ISSN: | 1381-1169 |
| DOI: | 10.1016/s1381-1169(03)00415-1 |
| Popis: | The iridium(I) compounds HIr(cod)(PR 3 ) 2 (cod: 1,5-cyclooctadiene; PR 3 : Ph 3 , P( p -MeOC 6 H 4 ) 3 , P( o -MeOC 6 H 4 )Ph 2 , PCyPh 2 , PCy 2 Ph) were employed as catalyst precursors for the polymerization of phenylacetylene. The polyene was formed as the major product with all the catalysts except the PCy 2 Ph derivative, which promoted preferential formation of oligomers. In all cases the polymerization reactions were highly stereoselective, yielding 100% trans -polyphenylacetylene. From the catalytic mixtures the iridium(III) derivatives fac -HIr(CCPh) 2 (PR 3 ) 3 (PR 3 : PPh 3 , P( p -MeOC 6 H 4 ) 3 ) were isolated. The results of spectroscopic studies are also reported, which provide information on the evolution of the iridium precursors during the catalytic reaction. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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