Jing-Yu Liu

Olefin Polymerization with Half-Metallocene Catalysts

In this chapter, recent development of half-sandwich titanium complexes containing anionic donor ligands as the catalyst precursors for olefin polymerization has been described. These catalysts display unique characteristics especially for synthesis of new ethylene copolymers by incorporation of new monomers that are very difficult or impossible to be incorporated in ethylene copolymerization by conventional Ziegler-Natta and ordinary metallocene catalysts. Both cyclopentadienyl fragment and anionic donor ligand play an essential key role for both the catalytic activity and the comonomer incorporation in the copolymerization.