Cationic Alkylaluminum-Complexed Zirconocene Hydrides as Participants in Olefin Polymerization Catalysis

Kurzanzeige
dc.contributor.authorBaldwin, Steven M.deu
dc.contributor.authorBercaw, John E.deu
dc.contributor.authorBrintzinger, Hans-Herbert
dc.date.accessioned2011-03-24T18:14:07Zdeu
dc.date.issued2010deu
dc.description.abstractThe alkylaluminum-complexed zirconocene trihydride cation [(SBI)Zr(μ-H)(3)(Al(i)Bu(2))(2)](+), which is obtained by reaction of (SBI)ZrCl(2) with [Ph(3)C][B(C(6)F(5))(4)] and excess HAl(i)Bu(2) in toluene solution, catalyzes the formation of isotactic polypropene when exposed to propene at -30 °C. This cation remains the sole observable species in catalyst systems free of AlMe compounds. In the presence of AlMe(3), however, exposure to propene causes the trihydride cation to be completely converted, under concurrent consumption of all hydride species by propene hydroalumination, to the doubly Me-bridged cation [(SBI)Zr(μ-Me)(2)AlMe(2)](+). The latter then becomes the resting state for further propene polymerization, which produces, by chain transfer to Al, mainly AlMe(2)-capped isotactic polypropene.
dc.description.versionpublished
dc.format.mimetypeapplication/pdfdeu
dc.identifier.citationFirst publ. in: Journal of the American Chemical Society: JACS 132 (2010), 40, pp. 13969-13971deu
dc.identifier.doi10.1021/ja105040r
dc.identifier.pmid20860389
dc.identifier.ppn336087306deu
dc.identifier.urihttp://kops.uni-konstanz.de/handle/123456789/9747
dc.language.isoengdeu
dc.legacy.dateIssued2011deu
dc.rightsterms-of-usedeu
dc.rights.urihttps://rightsstatements.org/page/InC/1.0/deu
dc.subject.ddc540deu
dc.titleCationic Alkylaluminum-Complexed Zirconocene Hydrides as Participants in Olefin Polymerization Catalysiseng
dc.typeJOURNAL_ARTICLEdeu
dspace.entity.typePublication
kops.citation.bibtex
@article{Baldwin2010Catio-9747,
  year={2010},
  doi={10.1021/ja105040r},
  title={Cationic Alkylaluminum-Complexed Zirconocene Hydrides as Participants in Olefin Polymerization Catalysis},
  number={40},
  volume={132},
  issn={0002-7863},
  journal={Journal of the American Chemical Society: JACS},
  pages={13969--13971},
  author={Baldwin, Steven M. and Bercaw, John E. and Brintzinger, Hans-Herbert}
}
kops.citation.iso690BALDWIN, Steven M., John E. BERCAW, Hans-Herbert BRINTZINGER, 2010. Cationic Alkylaluminum-Complexed Zirconocene Hydrides as Participants in Olefin Polymerization Catalysis. In: Journal of the American Chemical Society: JACS. 2010, 132(40), pp. 13969-13971. ISSN 0002-7863. eISSN 1520-5126. Available under: doi: 10.1021/ja105040rdeu
kops.citation.iso690BALDWIN, Steven M., John E. BERCAW, Hans-Herbert BRINTZINGER, 2010. Cationic Alkylaluminum-Complexed Zirconocene Hydrides as Participants in Olefin Polymerization Catalysis. In: Journal of the American Chemical Society: JACS. 2010, 132(40), pp. 13969-13971. ISSN 0002-7863. eISSN 1520-5126. Available under: doi: 10.1021/ja105040reng
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    <dcterms:abstract>The alkylaluminum-complexed zirconocene trihydride cation [(SBI)Zr(μ-H)(3)(Al(i)Bu(2))(2)](+), which is obtained by reaction of (SBI)ZrCl(2) with [Ph(3)C][B(C(6)F(5))(4)] and excess HAl(i)Bu(2) in toluene solution, catalyzes the formation of isotactic polypropene when exposed to propene at -30 °C. This cation remains the sole observable species in catalyst systems free of AlMe compounds. In the presence of AlMe(3), however, exposure to propene causes the trihydride cation to be completely converted, under concurrent consumption of all hydride species by propene hydroalumination, to the doubly Me-bridged cation [(SBI)Zr(μ-Me)(2)AlMe(2)](+). The latter then becomes the resting state for further propene polymerization, which produces, by chain transfer to Al, mainly AlMe(2)-capped isotactic polypropene.</dcterms:abstract>
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