G. Xie, Tingcheng Li, A. Zhang
Oct 1, 2010
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0
Influential Citations
36
Citations
Journal
Inorganic Chemistry Communications
Abstract
Abstract A series of asymmetric 2,6-bis(arylimino)pyridines with alkyl and halogen substitutients on different iminoaryl rings and corresponding iron (II) complexes ([2-(Ar 1 N = CCH 3 )-6-(Ar 2 N = CCH 3 )C 5 H 3 N]FeCl 2 , 3a – 3j ) are synthesized and characterized. These Fe(II) complexes are highly active for ethylene oligomerization with high selectivity for linear α-olefins. The oligomer distributions can be tuned by the synergism of alkyl-steric effect and halogen electronic effect, and the production of C 6 –C 16 can reach more than 80% with the highest selectivity being 87.5% for 3 g (Ar 1 = 2-ethylphenyl, Ar 2 = 2-fluorophenyl), which is 15–30% higher than that catalyzed by their methyl or fluoro-substituted symmetric counterparts.