Molecular and supported Ti( <scp>iii</scp> )-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
Abstract
Ti( iii ) alkyl species polymerize ethylene via an original mechanism, which involves back donation to the π*(C 2 H 4 ) and a delocalization of the unpaired electron in the transition state of C 2 H 4 insertion into the partially alkylidenic Ti( iii )–C bond.
Topics & Concepts
Delocalized electronAlkylPolymerizationEthyleneChemistryPolymer chemistryMetalUnpaired electronCharacter (mathematics)StereochemistryMoleculeCrystallographyPolymerOrganic chemistryCatalysisMathematicsGeometryOrganometallic Complex Synthesis and CatalysisOrganoboron and organosilicon chemistrySynthetic Organic Chemistry Methods