Probing the Characteristics of Mono- or Bimetallic (Iron or Cobalt) Complexes Bearing 2,4-Bis(6-iminopyridin-2-yl)-3H-benzazepines: Synthesis, Characterization, and Ethylene Reactivity

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• 作者：Wen-Hua Sun ; Qifeng Xing ; Jiangang Yu ; Elena Novikova ; Weizhen Zhao ; Xiubo Tang ; Tongling Liang ; Carl Redshaw
• 刊名：Organometallics
• 出版年：2013
• 出版时间：April 22, 2013
• 年：2013
• 卷：32
• 期：8
• 页码：2309-2318
• 全文大小：420K
• 年卷期：v.32,no.8(April 22, 2013)
• ISSN：1520-6041

文摘

A series of 2,4-bis(6-iminopyridin-2-yl)-3H-benzazepines and the mono- or bimetallic (Fe²⁺ or Co²⁺) complexes thereof were synthesized and characterized. All title complexes, when activated by MAO or MMAO, exhibited high activities of up to 4.0 脳 10⁷ g (mol of Fe)^鈭? h^鈥? for ethylene oligomerization and polymerization. The iron(II) precatalysts generally showed higher activities and produced a wider distribution of products (including oligomers and polyethylene) than did their corresponding cobalt(II) analogues. The bimetallic precatalysts exhibited higher (almost twice) activities in comparison to their monometallic analogues. The distribution of the resulting oligomers closely resembled the Schultz鈥揊lory rule.