Dihydrocarbyl-silyl-bridged-substituted cyclopentadienyl metallocene complexes for olefin polymerization

he invention relates to a metallocene complexes, I (R1 = C2-​10 alkyl, preferably C3-​10 alkyl, C6-​20 aryl, C7-​20 aralkyl; R2 = H, C1-​10 alkyl; R3, R4, R5, R6 = H, C1-​10 alkyl, C6-​20 aryl, C7-​20 aralkyl groups and wherein R3 and R4, R4 and R5, or R5 and R6 can be connected to form a ring structure; M = Ti, Zr, Hf; X = an anionic ligand to M)​. The invention also relates to a catalyst comprising the reaction product of the metallocene complex and a cocatalyst. Further the invention relates to a (co)​polymn. process of olefinic monomers.