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Updated: Jun 19, 2026

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers
Published on: December 16, 2022
Comparing families of olefin polymerization precatalysts using the percentage of buried volume
1Department of Chemistry, University of Salerno, Via ponte don Melillo, I-84084, Fisciano, Italy.
Abstract:
We report a systematic comparison of the steric properties of different stereoselective olefin polymerization catalysts using the percentage of buried volume, %V(Bur), as a molecular descriptor. For the first time, isoselective and syndioselective group 4 metallocenes are compared with group 4 isoselective phenoxy-amine and group 4 syndioselective phenoxy-imine catalysts using the same molecular descriptor. The results indicate that the basic bis-Cp skeleton of metallocenes is more hindered than the unsusbtituted skeleton of phenoxy-amine and phenoxy-imine based catalysts. The different effect of the same alkyl substituents on the different catalysts skeleton is also examined. A reasonable correlation is found between the experimental stereoselectivity and the %V(Bur).
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