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

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2008
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Babushkin, Dmitrii E.
Panchenko, Valentina N.
Timofeeva, Maria N.
Zakharov, Vladimir A.
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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.

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540 Chemie
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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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