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Catalyst Deactivation Processes During 1-Hexene Polymerization

preprint
submitted on 03.04.2020 and posted on 06.04.2020 by Anuj Joshi, Harmen S. Zijlstra, Scott Collins, J Scott McIndoe

The catalyst [Cp2Zr(μ-Me)2AlMe2]+[B(C6F5)4] (1) has been studied by electrospray ionisation mass spectrometry (ESI-MS) in order to better understand the complexities of catalyst deactivation in the polymerisation of 1-hexene. Using offline, online and flow-based methods, we observe that zirconium π-allyl species are unstable in solution and previously unobserved dimethylalane complexes are more stable. The dimethylalane complexes are resistant to further 1-hexene additions and their formation represent a new pathway for catalyst deactivation.

Funding

NSERC Strategic Project Grant #478998-15

History

Email Address of Submitting Author

mcindoe@uvic.ca

Institution

University of Victoria

Country

Canada

ORCID For Submitting Author

0000-0001-7073-5246

Declaration of Conflict of Interest

Work was partially supported by NOVA Chemicals’ Centre for Applied Research

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