Abstract
Cyclic olefin copolymers are an important class of polymeric materials. Here, we report the synthesis and characterization of several (N-O)-ligated palladium(II) complexes and their use in ethene homopolymerization, as well as ethene/norbornene and carbon monoxide/norbornene copolymerizations. Most notably, these catalysts show relatively high activity toward ethene/functional norbornene copolymerizations, and a high level of incorporation of the norbornene derivative was observed. The molecular weight of the copolymers can be controlled by adjusting the ethene/norbornene feed ratio. The ethene/nonpolar functional norbornene copolymerizations have the characteristics of a "living" polymerization at low ethene/norbornene feed ratios. Finally, the successive stepwise insertions of carbon monoxide and norbornene into a preformed palladiumcarbon bond were observed by NMR spectroscopy.
Original language | English (US) |
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Pages (from-to) | 3160-3168 |
Number of pages | 9 |
Journal | Organometallics |
Volume | 29 |
Issue number | 14 |
DOIs | |
State | Published - Jul 26 2010 |
All Science Journal Classification (ASJC) codes
- Physical and Theoretical Chemistry
- Organic Chemistry
- Inorganic Chemistry