C5Me5/ER-Ligated samarium(II) complexes (ER=OAr, SAr, NR1R2): A new type of olefin polymerization catalysts Presented at the 22nd Rare Earth Research Conference, Argonne, July 10-15, 1999 (Abstract No. E-2)

Article abstract of DOI:10.1016/S0925-8388(00)00654-X

The synthesis and polymerization reactions of a series of C₅Me₅/ER-ligated lanthanide(II) complexes (ER = OAr, SAr, NR¹R²) are described. In sharp contrast with the previously known metallocene complexes, this type of heteroleptic samarium(II) complex acts as a unique catalytic system, which cannot only polymerize styrene and ethylene, but also copolymerize them into block styrene-ethylene copolymers in the presence of both monomers.