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Polymerization of phenylacetylene with Di-μ-pentafluorothiophenolate bis (1,5-cyclooctadiene) rhodium (I) and its analogues

✍ Scribed by Ramón Vilar; Roberto Salcedo; Ruben Gaviño; Takeshi Ogawa

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
393 KB
Volume
30
Category
Article
ISSN
0014-3057

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✦ Synopsis

Polyphenylacetylene, in good yields and with high molecular weight, has been obtained using three new Rh based catalytic systems, i.e. [Rh(COD)(SC6Fs)]2, [Rh(COD)(SC6Hs)]2 and Rh(SC 6 F 5)(P4~3)(COD) where COD = 1,5-cyclooctadiene. t H-and 13C-NMR spectra have shown that the polyphenylacetylene obtained is highly stereoregular. The dependence of polyphenylacetylene yield and molecular weight on different experimental factors, namely solvent characteristics and monomer initial concentration, is also discussed in this work. Although the mechanism by which these catalysts polymerize phenylacetylene has not been completely elucidated due to its high complexity, new information was obtained and a catalytic mechanism has been proposed.

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Effects of substituent groups and substi
Effects of substituent groups and substituted benzenes on the polymerization of phenylacetylenes initiated by di-μ-pentafluorothiophenolate bis(1,5-cyclooctadiene) rhodium(I)
✍ Alfonso Escudero; Ramón Vilar; Roberto Salcedo; Takeshi Ogawa 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 349 KB

Abatraet-In order to study the mechanism of polymerization of phenylacetylene initiated by rhodium catalysts, the polymerization of phenylacetylene was carried out in the presence of various substituted benzenes. It was found that the benzenes with electron donor substituents had little effect on th