Oligomerisation of ethylene to linear α-olefins by tetrahedral cobalt(II) precursors stabilised by benzo[b]thiophen-2-yl-substituted (imino)pyridine ligands
作者:Claudio Bianchini、Giuliano Giambastiani、Giuseppe Mantovani、Andrea Meli、David Mimeau
DOI:10.1016/j.jorganchem.2003.10.034
日期:2004.4
On activation by MAO, 2-(imino)pyridine cobalt dichlorides bearing a benzo[b]thiophen-2-yl substituent in the 6-position of the pyridine ring oligomerise ethylene to alpha-olefins with turn-over-frequencies as high as 1.5 x 10(6) mol of C2H4 converted (mol of Co x h)(-1) and productivities as high as 3769 kg of oligomers (mol of Co x h x bar)(-1). Aldimine precursors are more active than ketimine analogues, yet ketimines give higher molecular weight oligomers. (C) 2003 Elsevier B.V. All rights reserved.