Metallocene complexes and catalysts prepared therefrom

A racemic metallocene complex of formula (I '), wherein each X is a sigma donor ligand; l is a divalent bridge based on carbon, silicon or germanium wherein one or two backbone atoms are linked to the ligand; m is Ti, Zr or Hf; each Het is independently a monocyclic or polycyclic heteroaryl or heterocyclic group comprising at least one heteroatom selected from O, N or S; each R1 is the same or different and is a linear C1-10 alkyl group, or a linear C1-10 alkoxy group, and each n is 0 to 3; each R2 is the same or different and is a-Si (RaRbRc) group; ra is a C1-10 alkyl group or phenyl group optionally substituted by 1 to 3 C1-6 alkyl groups; rb is C1-10 alkyl or phenyl which is optionally substituted by 1 to 3 C1-6 alkyl groups; rc is phenyl which is optionally substituted by 1 to 3 alkyl groups with 1 to 6 carbon atoms; and each p is 1 to 3. 一种式(I')的外消旋茂金属配合物，其中每个X是σ供体配体；L是基于碳、硅或锗的二价桥，其中一个或两个主链原子与配体连接；M是Ti、Zr或Hf；每个Het独立地是包括至少一个选自O、N或S的杂原子的单环或多环的杂芳基团或杂环基团；每个R1相同或不同，并且是直链C1-10烷基，或是直链C1-10烷氧基，每个n为0-3；每个R2相同或不同