Collect. Czech. Chem. Commun. 2007, 72, 697-702

Ethene/Norbornene Copolymerization with (Isodicyclopentadienyl)titanium Complex-MAO Catalyst

Sébastien Gentila, Nadine Pirioa, Philippe Meuniera,*, Fabrice Galloub and Leo A. Paquetteb

a Institut de Chimie Moléculaire, 'Université de Bourgogne - UMR CNRS 5260, 9 avenue Alain Savary, BP 47870, 21078 Dijon cedex, France
b Evans Chemical Laboratories, Department of Chemistry, The Ohio State University, Columbus, Ohio 43210, U.S.A.


Norbornene (NB) homopolymerization and ethene/NB copolymerizations with a silylene-bridged (isodicyclopentadienyl)(tert-butylamido)titanium dichloride-methylalumoxane (MAO) catalyst system were investigated. This catalytic system shows no efficiency towards NB homopolymerization but produces poly(ethene-co-norbornene)s. An increase in the initial NB feed content leads to a loss of copolymerization activity as well as NB copolymer incorporation. The structure of the isodicyclopentadienyl fragment (IsodiCp) has a strong limiting effect on comonomer incorporation possibilities.

Keywords: Amido-isodicyclopentadienyl ligand; Poly(ethene-co-norbornene); Titanium catalysts; Constrained geometry complexes; Copolymerization.

References: 24 live references.