Imidazoline-2-imine Functionalized Fluorenyl Rare-Earth Metal Complexes: Synthesis and Their Application in the Polymerization of <i>ortho</i>-Methoxystyrene
Suting Xu, Jixing Wang, Jingjing Zhai, Fei Wang, Li Pan, Xiaochao Shi
Abstract
We report the preparation of novel imidazoline-2-imine functionalized fluorenyl ligands with an ethylene bridge and their corresponding rare-earth metal complexes. Upon the activation of borate and triisobutyl aluminum (TIBA), all the rare-earth metal complexes could promote the syndiotactic polymerization of ortho-methoxystyrene (up to >99% rrrr), accompanying with the polar group activation effect via σ–π chelation of the methoxy and vinyl groups. The polymerization of 2-vinylprydiene was also performed.
Topics & Concepts
ChemistryPolymerizationPolymer chemistryImineMetalImidazoline receptorRare earthCoordination polymerizationBoronChelationOrganic chemistryAnionic addition polymerizationPolymerCatalysisMedicineMineralogyInternal medicineOrganometallic Complex Synthesis and CatalysisN-Heterocyclic Carbenes in Organic and Inorganic ChemistrySynthetic Organic Chemistry Methods