Propene polymerization with Ziegler‐type catalysts formed from Me2Si(Ind)2ZrMe2and cation‐generating reagents

Kinetic and polymer analytical results obtained with the systems Me2Si(Ind)2ZrMe2/[B(C6F4Si(i‐Pr)3)4]−[(C6H5)3C]+(2)and Me2Si(Ind)2ZrMe2/[B(C6F5)4]−[(C6H5)3C]+(3)in olefin polymerizations are compared (Me: methyl; Ind: indenyl). Both systems show that the polymerization rate increases with increasing metallocene concentration in a surplus due to the formation of binuclear species. The expected influence of increasing cation‐anion distance on the stereo‐errors of the poly(propylene)s when changing from system 3into system 2could not be detected.