Trinuclear tris(ansa-metallocene) complexes of zirconium and hafnium for olefin polymerization

Trinuclear group 4 tris(ansa-metallocene) complexes based on an original 1,3,5-phenylene-tris(isopropylidene-bridged cyclopentadienyl/fluorenyl) platform were synthesized and used as precatalysts in polymerization of ethylene and propylene and ethylene/1-hexene copolymerization.126