Halide Abstraction as a Route to Cationic Transition-Metal Complexes Containing Two-Coordinate Gallium and Indium Ligand Systems

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• 作者：Natalie R. Bunn ; Simon Aldridge ; Deborah L. Kays ; Natalie D. Coombs ; Andrea Rossin ; David J. Willock ; Joanna K. Day ; Cameron Jones ; and Li-ling Ooi
• 刊名：Organometallics
• 出版年：2005
• 出版时间：November 21, 2005
• 年：2005
• 卷：24
• 期：24
• 页码：5891 - 5900
• 全文大小：192K
• 年卷期：v.24,no.24(November 21, 2005)
• ISSN：1520-6041

文摘

Halide abstraction chemistry offers a viable synthetic route to the cationic two-coordinatecomplexes [{Cp*Fe(CO)₂}₂(-E)]⁺ (7, E = Ga; 8, E = In) featuring linear bridging gallium orindium atoms. Structural, spectroscopic, and computational studies undertaken on 7 areconsistent with appreciable Fe-Ga -bonding character; in contrast, the indium-bridgedcomplex 8 is shown to feature a much smaller component to the metal-ligand interaction.Analogous reactions utilizing the supermesityl-substituted gallyl or indyl precursors of thetype (⁵-C₅R₅)Fe(CO)₂E(Mes*)X, on the other hand, lead to the synthesis of halide-bridgedspecies of the type [{(⁵-C₅R₅)Fe(CO)₂E(Mes*)}₂(-X)]⁺, presumably by trapping of the highlyelectrophilic putative cationic diyl complex [(⁵-C₅R₅)Fe(CO)₂E(Mes*)]⁺.