Separation of rac and meso Diastereomers

Various strategies have been devised to maximize the formation of the racemic diastereomers of flnra-metallocenes. Most of the hitherto-described methods lack generality and are 

Stereoselective Polymerization with Single-Site Catalysts 

SCHEME 1.10 Generalized synthesis of bis(indenyl) anra-zirconocenes to give a mixture of roc and meso diastereomers. 

---