New iron-based bis(imino)pyridine and acetyliminopyridine complexes as single-site catalysts for the oligomerization of ethylene

被引：58

作者：

Bluhm, ME ^{[1
]}

Folli, C ^{[1
]}

Döring, M ^{[1
]}

机构：

[1] Forschungszentrum Karlsruhe, Inst Chem Tech, ITC, CPV, D-76021 Karlsruhe, Germany

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2004年 / 212卷 / 1-2期

关键词：

oligomerization; single-site catalysts; ethylene; bis(imino)pyridines; acetylimino-pyridines;

D O I：

10.1016/j.molcata.2003.11.003

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

New iron-based bis(imino)pyridine complexes 6, 7 and the acetyliminopyridine complex 8a are active catalysts together with the co-catalyst MAO for the oligomerization of ethylene. The ligands 1-4 with electron donating methoxy- and electron withdrawing trifluoromethyl-substituents react with FeCl2 (thf)(2) to the Fe(II) complexes 6-8a. Especially p-methoxy substituents in 6b increase the selectivity in the production of alpha-olefins. The distribution of oligomers obtained in the catalyzed ethylene oligomerization with 5-8a follows Schulz-Flory rules for oligomers >C-4. The probability of chain propagation ot is increased by lowering the reaction temperature, while higher pressure of the ethylene gas in the reaction has nearly no effect on the ce-values. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：13 / 18

页数：6

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