Issue 21, 2023

Manipulating pre-equilibria in olefin polymerization catalysis: backbone-stiffening converts a living into a highly active salan-type catalyst

Abstract

Stiffening of the catalyst backbone of salan-type catalyst 1via ring closure yields indanosalan 3 and increases activity and molar mass capability by two orders of magnitude. In propene polymerization, catalyst 3 is highly isotactic selective and nearly as active as one of the most productive known salan-catalysts today (2), showing much higher molar mass capability. NMR studies provide evidence of the identity of the active metal-polymeryl species for the catalyst pair 1/3, explaining their vast activity differences: the traditional salan catalyst 1 is trapped in the inactive mermer configuration, while indanosalan 3 prefers the active facfac isomer.

Graphical abstract: Manipulating pre-equilibria in olefin polymerization catalysis: backbone-stiffening converts a living into a highly active salan-type catalyst

Supplementary files

Article information

Article type
Research Article
Submitted
04 Aug 2023
Accepted
21 Sep 2023
First published
22 Sep 2023
This article is Open Access
Creative Commons BY license

Inorg. Chem. Front., 2023,10, 6401-6406

Manipulating pre-equilibria in olefin polymerization catalysis: backbone-stiffening converts a living into a highly active salan-type catalyst

D. V. Uborsky, M. I. Sharikov, G. P. Goryunov, K. M. Li, A. Dall'Anese, C. Zuccaccia, A. Vittoria, T. Iovine, G. Galasso, C. Ehm, A. Macchioni, V. Busico, A. Z. Voskoboynikov and R. Cipullo, Inorg. Chem. Front., 2023, 10, 6401 DOI: 10.1039/D3QI01537H

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