A New Type of Doubly Silylamido-Bridged Cyclopentadienyl Group 4 Metal Complexes
摘要:
Doubly bridged di(silyl-η-amido)cyclopentadienyltitanium and -zirconium complexes and their related cations as the [(PhCH2 )B(C6 F5 )3 ]- salts have been isolated (see structure of the Ti derivative). The neutral benzylzirconium complex was a very efficient catalyst in the presence of methylaluminoxane for producing high molecular weight polyethylene and ethylene-1-hexene copolymers.
The authors acknowledge the MCyT (project MAT2001-1309) for financial support and the EC (project COST-D12/0016/98). J. C. acknowledges CAM for a fellowship.