Type of Publication: | Journal article |
URI (citable link): | http://nbn-resolving.de/urn:nbn:de:bsz:352-236687 |
Author: | Babushkin, Dmitrii E.; Brintzinger, Hans-Herbert |
Year of publication: | 2007 |
Published in: | Chemistry - A European Journal ; 13 (2007), 18. - pp. 5294-5299. - ISSN 0947-6539. - eISSN 1521-3765 |
Pubmed ID: | 17385201 |
DOI (citable link): | https://dx.doi.org/10.1002/chem.200601801 |
Summary: |
When triisobutylaluminum (AliBu3) is added to solutions containing methylaluminoxane (MAO) and rac-[Me2Si(ind)2ZrCl2] (ind: indenyl) in C6D6, NMR spectra show that methyl-bridged mixed-alkylaluminum dimers Al(μ-Me)2Me4−xiBux predominate. These dimers react with MAO under partial transfer of isobutyl groups and induce a conversion of the initially prevailing cationic trimethylaluminum adduct rac-[Me2Si(ind)2Zr(μ-Me)2AlMe2+] to rac-[Me2Si(ind)2Zr(μ-Me)2AlMeiBu+] and rac-[Me2Si(ind)2Zr(μ-Me)2AliBu2+]. These species are unstable and release isobutene under formation of zirconocene hydrides.
|
Subject (DDC): | 540 Chemistry |
Keywords: | Aluminum alkyls, metallocenes, methylaluminoxane, polymerization, structure–activity relationships |
Link to License: | In Copyright |
BABUSHKIN, Dmitrii E., Hans-Herbert BRINTZINGER, 2007. Modification of methylaluminoxane-activated ansa-zirconocene catalysts with triisobutylaluminum-transformations of reactive cations studied by NMR spectroscopy. In: Chemistry - A European Journal. 13(18), pp. 5294-5299. ISSN 0947-6539. eISSN 1521-3765. Available under: doi: 10.1002/chem.200601801
@article{Babushkin2007Modif-23668, title={Modification of methylaluminoxane-activated ansa-zirconocene catalysts with triisobutylaluminum-transformations of reactive cations studied by NMR spectroscopy}, year={2007}, doi={10.1002/chem.200601801}, number={18}, volume={13}, issn={0947-6539}, journal={Chemistry - A European Journal}, pages={5294--5299}, author={Babushkin, Dmitrii E. and Brintzinger, Hans-Herbert} }
Babushkin_236687.pdf | 592 |