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Novel zirconocene hydride complexes in homogeneous and in SiO 2 -supported olefin-polymerization catalysts modified with diisobutylaluminum hydride or triisobutylaluminum

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Babushkin_236669.pdf
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2008

Autor:innen

Babushkin, Dmitrii E.
Panchenko, Valentina N.
Timofeeva, Maria N.
Zakharov, Vladimir A.

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http://nbn-resolving.de/urn:nbn:de:bsz:352-236669
DOI (zitierfähiger Link)
https://doi.org/10.1002/macp.200800084
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Published

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Macromolecular Chemistry and Physics. 2008, 209(12), pp. 1210-1219. ISSN 1022-1352. eISSN 1521-3935. Available under: doi: 10.1002/macp.200800084

Zusammenfassung

Reactive species in SiO2-supported, zirconocene-based olefin-polymerization catalysts have been characterized by comparison of their UV-vis spectra with those of related, NMR-spectroscopically identified catalyst species in homogeneous solution. Neutral zirconocene dihydride complexes are found to arise in hydrocarbon solutions as well as on SiO2 supports when catalyst systems that contain rac-Me2Si(ind)2ZrCl2 and methylaluminoxane (MAO) are modified by addition of diisobutylaluminum hydride or triisobutylaluminum. These complexes, tentatively formulated as adducts with Lewis-acidic alkylaluminum species AlR2X, rac-Me2Si(ind)2ZrH2 · {nAlR2X}, are reconverted into the initial reactive zirconocene cations upon addition of isobutene to these reaction systems.

Zusammenfassung in einer weiteren Sprache

Fachgebiet (DDC)
540 Chemie

Schlagwörter

MAO activation, metallocene catalysts, olefin polymerization, polyolefins, SiO2 support

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ISO 690BABUSHKIN, Dmitrii E., Valentina N. PANCHENKO, Maria N. TIMOFEEVA, Vladimir A. ZAKHAROV, Hans-Herbert BRINTZINGER, 2008. Novel zirconocene hydride complexes in homogeneous and in SiO 2 -supported olefin-polymerization catalysts modified with diisobutylaluminum hydride or triisobutylaluminum. In: Macromolecular Chemistry and Physics. 2008, 209(12), pp. 1210-1219. ISSN 1022-1352. eISSN 1521-3935. Available under: doi: 10.1002/macp.200800084
BibTex
@article{Babushkin2008Novel-23666,
  year={2008},
  doi={10.1002/macp.200800084},
  title={Novel zirconocene hydride complexes in homogeneous and in SiO 2 -supported olefin-polymerization catalysts modified with diisobutylaluminum hydride or triisobutylaluminum},
  number={12},
  volume={209},
  issn={1022-1352},
  journal={Macromolecular Chemistry and Physics},
  pages={1210--1219},
  author={Babushkin, Dmitrii E. and Panchenko, Valentina N. and Timofeeva, Maria N. and Zakharov, Vladimir A. and Brintzinger, Hans-Herbert}
}
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