Synthesis of Imidazolin-2-iminato Titanium Complexes Containing Aryloxo Ligands and Their Catalytic Performance in the Polymerization of α-Olefins

Dana Shoken, Linda J.W. Shimon, Matthias Tamm*, Moris S. Eisen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

The synthesis of mixed (aryloxo)(imidazolin-2-iminato)titanium dichloride complexes is presented. Full characterization of the complexes, including solid-state X-ray diffraction analysis of four complexes, is reported. Their catalytic activity in the polymerization of ethylene, propylene, 1-hexene, and 1-octene was studied. The different substituents at the aryloxo moiety were found to have a substantial impact on the reactivity of the complexes, indicating the need for a balance of steric and electronic effects. The complex (1,3-di-tert-butylimidazolin-2-iminato)(2,6-di-tert-butyl-4-methylphenoxide)titanium dichloride (1) was found to be the most active in the polymerization of ethylene, whereas the complex (1,3-di-tert-butylimidazolin-2-iminato)(2,6-di-tert-butylphenoxide)titanium dichloride (2) was found to be the most active in the polymerization of propylene. Interestingly, all complexes were more active in the polymerization of propylene than in that of ethylene.

Original languageEnglish
Pages (from-to)1125-1131
Number of pages7
JournalOrganometallics
Volume35
Issue number8
DOIs
StatePublished - 9 May 2016
Externally publishedYes

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