Issue 22, 2024

Triptycene as a scaffold in metallocene catalyzed olefin polymerization

Abstract

A set of metallocene olefin polymerization catalysts bearing triptycene moieties in either position 4–5 (complexes Ty1–Ty5) or in position 5–6 (complexes Ty6–Ty8) of the basic dimethylsilyl-bridged bis(indenyl) system has been tested in propene polymerization and in ethene/1-hexene copolymerization. Comparison of the results with QSPR (quantitative structure–property relationship) predictions not parametrized for these exotic ligand variations demonstrates that trends can still be identified by extrapolation. Interestingly, Ty7, upon suitable activation, provides a highly isotactic polypropylene with an exceptional amount of 2,1 regio-errors (8%). The previously developed QSPR type models successfully predicted the low regioselectivity of this catalyst, despite the fact that the catalyst structure differs significantly from the benchmark set.

Graphical abstract: Triptycene as a scaffold in metallocene catalyzed olefin polymerization

Supplementary files

Article information

Article type
Paper
Submitted
22 Apr 2024
Accepted
10 May 2024
First published
13 May 2024
This article is Open Access
Creative Commons BY-NC license

Dalton Trans., 2024,53, 9516-9525

Triptycene as a scaffold in metallocene catalyzed olefin polymerization

P. S. Kulyabin, M. I. Sharikov, V. V. Izmer, D. S. Kononovich, G. P. Goryunov, N. V. Alexeev, D. V. Uborsky, A. Vittoria, G. Antinucci, C. Ehm, P. H. M. Budzelaar, R. Cipullo, V. Busico and A. Z. Voskoboynikov, Dalton Trans., 2024, 53, 9516 DOI: 10.1039/D4DT01170H

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