Ethylene polymerization using tetramethyl(2-methylthioethyl)cyclopentadienyI complexes of cobalt

Tetramethyl(2-methylthioethyl)cyclopentadiene complexes of cobalt have been synthesized and tested in ethylene polymerization. In combination with MMAO-3A, tetramethyl(2-methylthioethyl)cyclopentadienylcobalt dilodide (4) was shown to polymerize ethylene to linear polyethylene with M(n)'s in th...

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Bibliographic Details
Published inOrganometallics Vol. 22; no. 23; pp. 4699 - 4704
Main Authors Daugulis, O, Brookhart, M, White, PS
Format Journal Article
LanguageEnglish
Published WASHINGTON Amer Chemical Soc 10.11.2003
Subjects
Chemistry
Chemistry, Inorganic & Nuclear
Chemistry, Organic
Physical Sciences
Science & Technology
LIGANDS
NICKEL
BEHAVIOR
STABILIZATION
OLEFIN POLYMERIZATION
SULFUR
CATALYST
COPOLYMERIZATION
DERIVATIVES
METAL-COMPLEXES
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Summary:Tetramethyl(2-methylthioethyl)cyclopentadiene complexes of cobalt have been synthesized and tested in ethylene polymerization. In combination with MMAO-3A, tetramethyl(2-methylthioethyl)cyclopentadienylcobalt dilodide (4) was shown to polymerize ethylene to linear polyethylene with M(n)'s in the range of 5000-68 000. The activity of the catalyst is improved compared to the previously described catalysts containing the Cp*Co(+)(PR(3)) unit. Cationic (tetramethyl(2-methylthioethyl)cyclopentadienyl)methylcobalt nitrile complexes 8 were also shown to be competent ethylene polymerization catalysts, producing polyethylene with similar properties as observed with 4/MAIAO-3A.
ISSN:0276-7333
DOI:10.1021/om030414b