A sterically expanded “constrained geometry catalyst” for highly active olefin polymerization and copolymerization: an unyielding comonomer effect

LJ Irwin, JH Reibenspies, SA Miller

Index: Irwin, Levi J.; Reibenspies, Joseph H.; Miller, Stephen A. Journal of the American Chemical Society, 2004 , vol. 126, # 51 p. 16716 - 16717

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Citation Number: 77

Abstract

The 14 Å octamethyloctahydrodibenzofluorene moiety has been incorporated into a sterically expanded constrained geometry catalyst, Me2Si (η 1-C29H36)(η1-Nt Bu) ZrCl2⊙ OEt2 (1). The solid-state structure suggests that the activated olefin polymerization catalyst is quite spatially accessible, rationalizing its extraordinary reactivity toward α-olefins. 1/MAO (MAO= methylaluminoxane) can be more reactive toward α-olefins than toward ethylene ...