The reaction of the organometallic acid [(η⁵-C₅H₄COOH)₂Co^III]⁺ with HBr and HI. Preparation and characterisation of [(η⁵-C₅H₄COOH)₂Co

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• 作者：Braga ; Dario ; Emiliani ; Dario ; Cojazzi ; Gianna ; Maini ; Lucia ; Polito ; Marco ; Grepioni ; Fabrizia
• 关键词：Water-soluble organometallics ; Dicarboxylic acids ; Hydrogen bonds ; Organometallic zwitterion
• 刊名：Journal of Molecular Structure
• 出版年：2003
• 出版时间：February 28, 2003
• 年：2003
• 卷：647
• 期：1-3
• 页码：113-119
• 全文大小：168 K

文摘

The water soluble dicarboxylic cationic acid [(η⁵-C₅H₄COOH)₂Co^III]⁺ (1) as its Cl⁻ salt has been treated thermally to produce the neutral zwitterion [(η⁵-C₅H₄COOH)(η⁵-C₅H₄COO)Co^III] (2). 2 reacts with HBr in water solution to yield the bromide salt of the dicarboxylic acid [(η⁵-C₅H₄–COOH)₂Co^III]Br, 1Br. Preparation of the iodide [(η⁵-C₅H₄–COOH)₂Co^III]I, 1I, has been achieved by direct oxidation of [(η⁵-C₅H₄Me)₂Co^III]OH with KMnO₄ immediately followed by reaction with HI. The crystal structures of 1Br and 1I have been determined by single crystal X-ray diffraction. The hydrogen bonding interactions between the acid cations and between the acid cation and the halide ions have been investigated.