Rare earth metal complexes that contain linked amido-cyclopentadienyl ligands: ansa-metallocene mimics and “constrained geometry” catalysts
- 17 April 2003
- journal article
- perspective
- Published by Royal Society of Chemistry (RSC) in Dalton Transactions
- No. 12,p. 2367-2378
- https://doi.org/10.1039/b300818e
Abstract
A survey of group 3 metal complexes that contain a linked amido-cyclopentadienyl ligand is given. Originally designed as ansa-metallocene analogues for the development of single-component olefin polymerization catalysts, variations in the metals and ligand substituents have allowed the synthetic access to new rare earth metal complexes including olefin polymerization initiators, divalent complexes and heterobimetallic metallocenes. The linked amido-cyclopentadienyl ligands have made half-sandwich complexes of group 3 metals accessible in a more systematic manner and provided a better understanding of the electronic and steric constraints of chelating ligands for the larger rare earth metal centres.Keywords
This publication has 1 reference indexed in Scilit:
- Rare earth metal-based catalysts for the polymerization of nonpolar and polar monomersPublished by Walter de Gruyter GmbH ,2001