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学科主题: 金属有机化学 ; 有机氟化学
题名: Fluoro-substituted 2,6-bis(imino)pyridyl iron and cobalt complexes: High-Activity ethylene oligomerization catalysts
其他题名: 氟取代2,6二亚胺吡啶铁和钴配合物:高活性乙烯齐聚催化剂
作者: Chen YF(陈耀峰) ; Qian ZT(钱长涛) ; Sun J(孙杰)
通讯作者: 钱长涛
刊名: Organometallics
发表日期: 2003
卷: 22, 期:6, 页:1231-1236
收录类别: SCI
部门归属: 中国科学院上海有机化学研究所金属有机化学开放实验室
英文摘要: Six five-coordinate difluoro-substituted 2,6-bis(imino)pyridyl iron and cobalt complexes,[{2,6-(2,X-F2C6H3NdCCH3)2C5H3N}MCl2] (X = 6, M ) Fe (1), Co (2); X = 5, M = Fe (3), Co(4)); X = 4, M = Fe (5), Co (6)), were synthesized by reactions of the corresponding bis-(imino)pyridyl ligands with FeCl2a4H2O or CoCl2 in tetrahydrofuran (THF). However, a reaction between 2,6-diacetylpyridinebis(2,6-difluoroanil) and FeCl2a4H2O inCH3CN provided the ion-pair complex [Fe{2,6-(2,6-F2C6H3NdCCH3)2C5H3N}2]2+[FeCl4]2- (7) instead of a fivecoordinate complex. The molecular structures of complexes 3 and 6 were determined by X-ray diffraction. The catalytic activities of complexes 1-7 for ethylene oligomerization were studied using modified methylaluminoxane (MMAO) as cocatalyst. At 60 °C and 10 atm of ethylene pressure, the iron complexes 1, 3, and 5 show very high activities: 4.07 _ 107, 9.33 _ 107, and 11.1 _ 107 g/((mol of cat.) h), respectively. The oligomers formed consist mainly of dimer, trimer, and tetramer, with approximately 90% of the products being in the range of C4-C8. The complexes 1, 3, and 5 also exhibit high selectivity for linear R-olefins: >98% (complex 1) and >93% (complexes 3 and 5). The cobalt complexes 2, 4, and 6 and the ion-pair iron complex 7 are inactive for ethylene oligomerization
语种: 英语
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WOS记录号: WOS:000181507300010
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内容类型: 期刊论文
URI标识: http://ir.sioc.ac.cn/handle/331003/15265
Appears in Collections:金属有机化学国家重点实验室_期刊论文

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Recommended Citation:
Chen YF,Qian ZT,Sun J. Fluoro-substituted 2,6-bis(imino)pyridyl iron and cobalt complexes: High-Activity ethylene oligomerization catalysts[J]. Organometallics,2003,22(6):1231-1236.
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