Based on the results of a series of propylene polymns. using oscillating metallocene catalysts of type [(2-Ar-indenyl)2ZrCl2] (Ar = C6H5 or 3,5-(t-Bu)2-4-MeO-C6H2) with various cocatalysts (MAO, TIBAl), the oscillating behavior of the zirconocenes is discussed with respect to the rac/meso stereochem. outcome of the obtained polypropylenes. These catalysts can change their stereoselectivity depending on their interaction with the reaction system (cocatalyst, solvent, counterion).
"Oscillating" metallocene catalysts: how do they oscillate? / Busico, Vincenzo; Cipullo, Roberta; Kretschmer Winfried, P; Talarico, Giovanni; Vacatello, Michele; Van Axel Castelli, Valeria. - In: ANGEWANDTE CHEMIE. INTERNATIONAL EDITION. - ISSN 1433-7851. - STAMPA. - 41:(2002), pp. 505-508.
"Oscillating" metallocene catalysts: how do they oscillate?
BUSICO, VINCENZO;CIPULLO, ROBERTA;TALARICO, GIOVANNI;VACATELLO, MICHELE;
2002
Abstract
Based on the results of a series of propylene polymns. using oscillating metallocene catalysts of type [(2-Ar-indenyl)2ZrCl2] (Ar = C6H5 or 3,5-(t-Bu)2-4-MeO-C6H2) with various cocatalysts (MAO, TIBAl), the oscillating behavior of the zirconocenes is discussed with respect to the rac/meso stereochem. outcome of the obtained polypropylenes. These catalysts can change their stereoselectivity depending on their interaction with the reaction system (cocatalyst, solvent, counterion).| File | Dimensione | Formato | |
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