Producing Monoaryloxy-ansa-Metallocenes

Patent Method for Producing Monoaryloxy-ansa-Metallocenes 

Binger etal, US Patent 6,620,953 (September 16, 2003) Assignee B as sell Polyolefine GmbH Utility Olefin Polymerization Catalyst 

Zirconium monochloride mono(0-2,4-di-t-butyl)benzene 2THF (1) 

ZiCl4 (30 mmol) and trimethyl (2,4-di-t-butyl-phenoxy)silane (30 mmol) were reacted in THF, re-crystallized, and the product isolated in 55% yield. H-NMR data supplied. 

pseudo-rac Dimethylsilanediylbis(2-methyl-4,5-benzo-indenyl)zirconium monochloride mono(2,4-di-t-butylphenoxide) 

---