The formation of the cationic species is achieved after rac- 1 is methylated to form rac-(EBI)ZrMe2 (rac- 2 ) by MAO and/or free Al2Me6 contained in MAO. The same sequential reaction has been performed by using rac(EBI)ZrCl2 (rac- 3 ) for the comparison. MAO cannot generate the...
to give rac-(EBI)ZrMe2, and the introduction of [Ph3C] [B(C6F5)4] into the reaction mixture containing rac-(EBI)ZrMe2 led to in situ generation of cationic [rac-(EBI)Zr(μ-Me)2AlMe2]+ species that can polymerize propylene to give iPP showing a meso pentad val...