Journal
JOURNAL OF ORGANOMETALLIC CHEMISTRY
Volume 691, Issue 14, Pages 3114-3121Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jorganchem.2006.01.055
Keywords
cationic rare earth metal alkyls; olefin polymerization; metallocene catalysis; cyclic olefins; styrene; isoprene
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Cationic rare earth metal alkyl species, generated by the treatment of mono(cyclopentadienyl) bis(alkyl) rare earth metal complexes with 1 equiv. of a borate compound such as [Ph3C][B(C6F5)(4)], act as an excellent catalyst for the polymerization and copolymerization of various olefins such as ethylene, 1-hexene, styrene, norbornene, dicyclopentadiene, and isoprene. These catalysts show unprecedented activity and regio- and stereo-selectivity and afford a series of new polymers which are difficult to be prepared previously. (c) 2006 Elsevier B.V. All rights reserved.
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