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Molecular And Supported Ti(iii)-alkyls: Efficient Ethylene Polymerization Driven By The π-character Of Metal–carbon Bonds And Back Donation From A Singly Occupied Molecular Orbital

Anton Ashuiev, Florian Allouche, Nino Wili, Keith Searles, Daniel Klose, Christophe Copéret, Gunnar Jeschke

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Ti(iii) alkyl species polymerize ethylene via an original mechanism, which involves back donation to the π*(C2H4) and a delocalization of the unpaired electron in the transition state of C2H4 insertion into the partially alkylidenic Ti(iii)–C bond.