N. Schneider, F. Schaper, Katrin Schmidt
Aug 5, 2000
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0
Influential Citations
23
Citations
Journal
Organometallics
Abstract
(2-Methylcyclopenta[l]phenanthryl)2ZrCl2 and (2-phenylcyclopenta[l]phenanthryl)2ZrCl2 were synthesized and used, after activation with MAO, as catalysts for the polymerization of propene. The resulting polymers had low isotacticities (8−18% [mmmm]). Ligand rotation barriers for the corresponding Zr−dibenzyl derivatives were determined by dynamic NMR spectroscopy. Pathways and transition states for ligand rotation in this series of complexes were studied by molecular-mechanics calculations and are discussed in relation to the microstructure of the respective polymer products.