Synthesis, Characterization and Efficient Catalytic Ethylene Polymerization Reactions of Phenylphosphine Half-metallocene Zirconium Complexes

A series of half-metallocene zirconium complexes with phenylphosphine ligands, CpZr(thf)Cl2[O-2-R1-4-R2-6-(PPh2)C6H2] (2a: R1 = tBu, R2 = tBu; 2b: R1 = C(CH3)2CH2CH3, R2 = C(CH3)2CH2CH3; 2c: R1 = tBu, R2 =...