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Issue 25, 2016

Hydrosilane-B(C6F5)3 adducts as activators in zirconocene catalyzed ethylene polymerization

Author affiliations

Abstract

Hydrosilane-B(C6F5)3 adducts were found to activate zirconocene dihalides and generate ternary catalytic systems possessing moderate to high activity in ethylene polymerization to high density polyethylene (HDPE). The activation efficacy of the adducts increased with increasing hydride donor ability and decreased with steric crowding of the particular hydrosilane used. NMR investigation of the HSiEt3/B(C6F5)3/Cp*2ZrF2 system (Cp* = η5-C5Me5) revealed the formation of a stable intermediate [Cp*2ZrF(FSiEt3-κF)]+[HB(C6F5)3], whereas a crucial role of the [HB(C6F5)3] anion as a hydride donor for generation of an active cationic zirconium hydride center was elucidated.

Graphical abstract: Hydrosilane-B(C6F5)3 adducts as activators in zirconocene catalyzed ethylene polymerization

Supplementary files

Article information


Submitted
16 May 2016
Accepted
18 May 2016
First published
19 May 2016

Dalton Trans., 2016,45, 10146-10150
Article type
Communication

Hydrosilane-B(C6F5)3 adducts as activators in zirconocene catalyzed ethylene polymerization

V. Varga, M. Lamač, M. Horáček, R. Gyepes and J. Pinkas, Dalton Trans., 2016, 45, 10146 DOI: 10.1039/C6DT01946C

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