Hafnocene catalysts for selective propylene oligomerization: efficient synthesis of 4-methyl-1-pentene by β-methyl transfer

Y Suzuki, T Yasumoto, K Mashima…

Index: Suzuki, Yasuhiko; Yasumoto, Takahiro; Mashima, Kazushi; Okuda, Jun Journal of the American Chemical Society, 2006 , vol. 128, # 39 p. 13017 - 13025

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Citation Number: 20

Abstract

A series of hafnocene complexes (η5-C5Me4R1)(η5-C5Me4R2) HfCl2 with [R1, R2]=[H, H](1),[Me, H](2),[Me, Me](3),[Et, Me](4),[i Pr, Me](5),[SiMe3, Me](6),[t Bu, Me](7),[n Bu, Me](8),[i Bu, Me](9),[Et, Et](10),[n Bu, n Bu](11),[i Bu, i Bu](12) was tested as catalyst precursors for propylene oligomerization. Upon activation with methylaluminoxane or [Ph3C][B (C6F5) 4]/Al i Bu3, complexes 2-4 and 8-12 catalyzed the dimerization of ...