Dialkylaminoethyl-functionalized ansa-zirconocene dichlorides: synthesis, structure, and polymerization properties

Jutzi P, Müller C, Neumann B, Stammler H-G. Dialkylaminoethyl-functionalized ansa-zirconocene dichlorides: synthesis, structure, and polymerization properties. European Journal of Inorganic Chemistry. 2001;625(2):180-185.Donor substituted carbon- and silicon-bridged zirconocene dichlorides of the type [eta (5)-C13H8-CMe2-eta (5)-C5H3(CH2CH2NR2)]ZrCl2 (R = Me (2a), Et (2b), Pr-i (2c)) and [eta (5)-C13H8-SiMe2-eta (5)-C5H3(CH2CH2NR2)]ZrCl2 (R = Me (4a), Et (4b), Pr-i (4c)) have been prepared. Activation of 2a-c and 4a-c with excess methylalumoxane results in the formation of catalytically active species for the polymerization of ethylene and propylene. (C) 2001 Elsevier Science B.V. All rights reserved