Intramolecular Formation of a CrI(bis-arene) Species via TEA Activation of [Cr(CO)4(Ph2P(C3H6)PPh2)]+: An EPR and DFT Inves

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• 作者：Lucia McDyre ; Emma Carter ; Kingsley J. Cavell ; Damien M. Murphy ; James A. Platts ; Katharine Sampford ; Benjamin D. Ward ; William F. Gabrielli ; Martin J. Hanton ; David M. Smith
• 刊名：Organometallics
• 出版年：2011
• 出版时间：September 12, 2011
• 年：2011
• 卷：30
• 期：17
• 页码：4505-4508
• 全文大小：716K
• 年卷期：v.30,no.17(September 12, 2011)
• ISSN：1520-6041

文摘

Activation of the catalytically relevant complex [Cr(CO)₄(1)]⁺ (1 = Ph₂P(C₃H₆)PPh₂) by Et₃Al (TEA) leads to formation of the Cr(I) bis-arene complex [Cr(1-bis-畏⁶-arene)]⁺, as revealed by EPR and DFT calculations. This bis-arene complex is formed by intramolecular rearrangement and coordination of Cr(I) to the ligand phenyl groups in aliphatic solvents following loss of CO, preventing release of Cr(I) into solution. By comparison in aromatic solvents (toluene), the [Cr(bis-tolyl)]⁺ complex is preferentially formed.