Stereochemistry of first monomer insertion into a metal-methyl bond : enantioselectivity and diastereoselectivity in 3-methyl 1-pentene polymerization with metallocene catalysts

Kurzanzeige
dc.contributor.authorSacchi, Maria Carmeladeu
dc.contributor.authorBarsties, Elkedeu
dc.contributor.authorTritto, Incoronatadeu
dc.contributor.authorLocatelli, Paolodeu
dc.contributor.authorBrintzinger, Hans-Herbert
dc.contributor.authorStehling, Udodeu
dc.date.accessioned2013-06-24T16:22:26Zdeu
dc.date.available2013-06-24T16:22:26Zdeu
dc.date.issued1997
dc.description.abstractThe stereochemistry of first monomer insertion in the polymerization of racemic 3-methyl-1-pentene ((RS)-3MP1) with three different metallocene complexes, Me2Si(Ind)2ZrCl2 (I), Me2Si(BenzInd)2ZrCl2 (II), and Me2Si(MeBenzInd)2ZrCl2 (III), in the presence of MAO/Al(13CH3)3 cocatalyst has been studied and the results have been compared to those previously obtained using the traditional isospecific TiCl3/Al(13CH3)3 heterogeneous catalyst. The highest enantioselectivity and diastereoselectivity are observed with the least hindered metallocene (catalyst I). While enantioselectivity decreases due to benzannelation of the ligand with catalyst II, the methyl substitution in the 2-position of the cyclopentadienyl rings with catalyst III causes an almost complete lack of diastereoselectivity.eng
dc.description.versionpublished
dc.identifier.citationMacromolecules ; 30 (1997), 5. - S. 1267-1271deu
dc.identifier.doi10.1021/ma9609801deu
dc.identifier.urihttp://kops.uni-konstanz.de/handle/123456789/23758
dc.language.isoengdeu
dc.legacy.dateIssued2013-06-24deu
dc.rightsterms-of-usedeu
dc.rights.urihttps://rightsstatements.org/page/InC/1.0/deu
dc.subject.ddc540deu
dc.titleStereochemistry of first monomer insertion into a metal-methyl bond : enantioselectivity and diastereoselectivity in 3-methyl 1-pentene polymerization with metallocene catalystseng
dc.typeJOURNAL_ARTICLEdeu
dspace.entity.typePublication
kops.citation.bibtex
@article{Sacchi1997Stere-23758,
  year={1997},
  doi={10.1021/ma9609801},
  title={Stereochemistry of first monomer insertion into a metal-methyl bond : enantioselectivity and diastereoselectivity in 3-methyl 1-pentene polymerization with metallocene catalysts},
  number={5},
  volume={30},
  issn={0024-9297},
  journal={Macromolecules},
  pages={1267--1271},
  author={Sacchi, Maria Carmela and Barsties, Elke and Tritto, Incoronata and Locatelli, Paolo and Brintzinger, Hans-Herbert and Stehling, Udo}
}
kops.citation.iso690SACCHI, Maria Carmela, Elke BARSTIES, Incoronata TRITTO, Paolo LOCATELLI, Hans-Herbert BRINTZINGER, Udo STEHLING, 1997. Stereochemistry of first monomer insertion into a metal-methyl bond : enantioselectivity and diastereoselectivity in 3-methyl 1-pentene polymerization with metallocene catalysts. In: Macromolecules. 1997, 30(5), pp. 1267-1271. ISSN 0024-9297. eISSN 1520-5835. Available under: doi: 10.1021/ma9609801deu
kops.citation.iso690SACCHI, Maria Carmela, Elke BARSTIES, Incoronata TRITTO, Paolo LOCATELLI, Hans-Herbert BRINTZINGER, Udo STEHLING, 1997. Stereochemistry of first monomer insertion into a metal-methyl bond : enantioselectivity and diastereoselectivity in 3-methyl 1-pentene polymerization with metallocene catalysts. In: Macromolecules. 1997, 30(5), pp. 1267-1271. ISSN 0024-9297. eISSN 1520-5835. Available under: doi: 10.1021/ma9609801eng
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    <dcterms:abstract xml:lang="eng">The stereochemistry of first monomer insertion in the polymerization of racemic 3-methyl-1-pentene ((RS)-3MP1) with three different metallocene complexes, Me&lt;sub&gt;2&lt;/sub&gt;Si(Ind)&lt;sub&gt;2&lt;/sub&gt;ZrCl&lt;sub&gt;2&lt;/sub&gt; (I), Me&lt;sub&gt;2&lt;/sub&gt;Si(BenzInd)&lt;sub&gt;2&lt;/sub&gt;ZrCl&lt;sub&gt;2&lt;/sub&gt; (II), and Me&lt;sub&gt;2&lt;/sub&gt;Si(MeBenzInd)&lt;sub&gt;2&lt;/sub&gt;ZrCl&lt;sub&gt;2&lt;/sub&gt; (III), in the presence of MAO/Al(13CH3)3 cocatalyst has been studied and the results have been compared to those previously obtained using the traditional isospecific TiCl&lt;sub&gt;3&lt;/sub&gt;/Al(&lt;sup&gt;13&lt;/sup&gt;CH&lt;sub&gt;3&lt;/sub&gt;)&lt;sub&gt;3&lt;/sub&gt; heterogeneous catalyst. The highest enantioselectivity and diastereoselectivity are observed with the least hindered metallocene (catalyst I). While enantioselectivity decreases due to benzannelation of the ligand with catalyst II, the methyl substitution in the 2-position of the cyclopentadienyl rings with catalyst III causes an almost complete lack of diastereoselectivity.</dcterms:abstract>
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kops.identifier.nbnurn:nbn:de:bsz:352-237587deu
kops.sourcefieldMacromolecules. 1997, <b>30</b>(5), pp. 1267-1271. ISSN 0024-9297. eISSN 1520-5835. Available under: doi: 10.1021/ma9609801deu
kops.sourcefield.plainMacromolecules. 1997, 30(5), pp. 1267-1271. ISSN 0024-9297. eISSN 1520-5835. Available under: doi: 10.1021/ma9609801deu
kops.sourcefield.plainMacromolecules. 1997, 30(5), pp. 1267-1271. ISSN 0024-9297. eISSN 1520-5835. Available under: doi: 10.1021/ma9609801eng
kops.submitter.emailoleg.kozlov@uni-konstanz.dedeu
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source.bibliographicInfo.fromPage1267
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source.bibliographicInfo.volume30
source.identifier.eissn1520-5835deu
source.identifier.issn0024-9297
source.periodicalTitleMacromolecules

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