Formation and Reactivity of a Co4-渭-Alkyne Cluster from a Co(I)-Alkene Complex

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• 作者：Nico Weding ; Anke Spannenberg ; Ralf Jackstell ; Marko Hapke
• 刊名：Organometallics
• 出版年：2012
• 出版时间：August 13, 2012
• 年：2012
• 卷：31
• 期：15
• 页码：5660-5663
• 全文大小：239K
• 年卷期：v.31,no.15(August 13, 2012)
• ISSN：1520-6041

文摘

Highly reactive Co(I) complex [CpCo(H₂C鈺怌HSiMe₃)₂] (1) easily forms a tetranuclear Co₄ cluster in hydrocarbon solvents under mild conditions, possessing a bridging alkyne ligand stemming from an unusual C鈥揌 activation of the H₂C鈺怌HSiMe₃ ligand. The cluster was structurally characterized, and the catalytic reactivity in [2+2+2] cycloaddition, hydroformylation, and hydrogenation reactions investigated. Interesting differences were found and compared to the mononuclear complex 1, which could be relevant for the real catalytically active species.