Acetylene Cyclotrimerization with an Iron(II) Bis(imino)pyridine Catalyst

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• 作者：Samuel S. Karpiniec ; David S. McGuinness ; George J. P. Britovsek ; Jim Patel
• 刊名：Organometallics
• 出版年：2012
• 出版时间：April 23, 2012
• 年：2012
• 卷：31
• 期：8
• 页码：3439-3442
• 全文大小：216K
• 年卷期：v.31,no.8(April 23, 2012)
• ISSN：1520-6041

文摘

Acetylene oligomerization with an activated iron bis(imino)pyridine complex with low steric hindrance leads to benzene as the major product, in contrast to this reaction with a more sterically encumbered analogue, which leads to polyacetylene. The mechanism of benzene formation was studied and likely occurs via metallacycle intermediates; this process can be interrupted by addition of ZnEt₂ as a chain transfer agent to generate hexadiene instead.