Zirconium-Allyl Complexes as Resting States in Zirconocene-Catalyzed α-Olefin Polymerization

UV‐vis spectroscopic data indicate that zirconocene cations with Zr‐bound allylic chain ends are generally formed during olefin polymerization with zirconocene catalysts. The rates and extent of their formation and of their re‐conversion to the initial pre‐catalyst cations depend on the types of zir...

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Bibliographic Details
Published in:Macromolecular rapid communications. 2015-01, Vol.36 (2), p.249-253
Main Authors: Panchenko, Valentina N., Babushkin, Dmitrii E., Brintzinger, Hans H.
Format: Article
Language:English
Subjects:
Alkenes - chemistry
allyl complexes
Catalysis
Catalysts
Cationic polymerization
Cations
Chains (polymeric)
Formations
metallocene catalysts
olefin polymerization
Olefins
Organometallic Compounds - chemistry
Polymerization
Polymers - chemical synthesis
Polymers - chemistry
resting states
Spectrometry, Fluorescence
Zirconium
Zirconium - chemistry
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Summary:UV‐vis spectroscopic data indicate that zirconocene cations with Zr‐bound allylic chain ends are generally formed during olefin polymerization with zirconocene catalysts. The rates and extent of their formation and of their re‐conversion to the initial pre‐catalyst cations depend on the types of zirconocene complexes and activators used. Formation of zirconocene cations with Zr‐bound allylic chain ends is shown to be a general phenomenon when olefins are polymerized with a zirconocene catalyst. The rate and the extent of Zr‐allyl formation depend on the kinds of zirconocene precatalysts and activators used for the catalyst system considered.
ISSN:1022-1336
1521-3927
DOI:10.1002/marc.201400444