C1-Symmetric {cyclopentadienyl/indenyl}-metallocene catalysts: synthesis, structure, isospecific polymerization of propylene and stereocontrol mechanism

A series of new Me 2 Si-bridged cyclopentadiene/indene proligands {Me 2 Si(R 2′,5′ 2 -R 3′,4′ 2 -Cp)(R 2 ,R 4 ,R 5 ,R 6 -Ind)H 2 } (1a–j) with various substitutions both on the indene and cyclopentadiene moieties was prepared.