Type of Publication: | Journal article |
URI (citable link): | http://nbn-resolving.de/urn:nbn:de:bsz:352-236669 |
Author: | Babushkin, Dmitrii E.; Panchenko, Valentina N.; Timofeeva, Maria N.; Zakharov, Vladimir A.; Brintzinger, Hans-Herbert |
Year of publication: | 2008 |
Published in: | Macromolecular Chemistry and Physics ; 209 (2008), 12. - pp. 1210-1219. - ISSN 1022-1352. - eISSN 1521-3935 |
DOI (citable link): | https://dx.doi.org/10.1002/macp.200800084 |
Summary: |
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.
|
Subject (DDC): | 540 Chemistry |
Keywords: | MAO activation, metallocene catalysts, olefin polymerization, polyolefins, SiO2 support |
Link to License: | In Copyright |
BABUSHKIN, 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. 209(12), pp. 1210-1219. ISSN 1022-1352. eISSN 1521-3935. Available under: doi: 10.1002/macp.200800084
@article{Babushkin2008Novel-23666, title={Novel zirconocene hydride complexes in homogeneous and in SiO 2 -supported olefin-polymerization catalysts modified with diisobutylaluminum hydride or triisobutylaluminum}, year={2008}, doi={10.1002/macp.200800084}, 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} }
Babushkin_236669.pdf | 591 |