Photochemical Reaction of Cp*Ir(CO)2 with C6F5X (X = CN, F): Formation of Diiridium(II) Complexes

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• 作者：Kar Hang Garvin Mak ; Pek Ke Chan ; Wai Yip Fan ; Rakesh Ganguly ; Weng Kee Leong
• 刊名：Organometallics
• 出版年：2013
• 出版时间：February 25, 2013
• 年：2013
• 卷：32
• 期：4
• 页码：1053-1059
• 全文大小：479K
• 年卷期：v.32,no.4(February 25, 2013)
• ISSN：1520-6041

文摘

Visible light irradiation of Cp*Ir(CO)₂ (1) in pentafluorobenzontrile resulted in the formation of the two isomeric diiridium(II) complexes [Cp*Ir(渭-CO)(C₆F₄CN)]₂ (3) and [Cp*Ir(CO)(C₆F₄CN)]₂ (4), while the analogous reaction of 1 in hexafluorobenzene to give [Cp*Ir(渭-CO)(C₆F₅)]₂ (3a) required UV irradiation. Complex 4 isomerizes to 3 under visible light irradiation. A reaction pathway to 4 involving aromatic nucleophilic substitution has been proposed on the basis of experimental and computational data. The isomerization of 4 to 3 is believed to proceed via a radical species resulting from homolytic fission of the Ir鈥揑r bond.