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• 作者：Lilian A. Paim ; Fabr¨ªcia M. Dias ; Helmuth G.L. Siebald ; Javier Ellena ; Jos¨¦ D. Ardisson ; Monize M. da Silva ; Alzir A. Batista
• 关键词：Heterobimetallic complexes ; Arene&ndash ; ruthenium ; 1 ; 1&prime ; -Bis(diphenylphosphino)ferrocene ; Mö ; ssbauer ; Electrochemistry
• 刊名：Polyhedron
• 出版年：2012
• 出版时间：25 July, 2012
• 年：2012
• 卷：42
• 期：1
• 页码：110-117
• 全文大小：703 K

文摘

The arene-ruthenium complex [Ru(¦Ç⁶-C₁₀H₁₄)(dppf)Cl]PF₆ (1) was used as a precursor for the syntheses of the [Ru(¦Ç⁶-C₁₀H₁₄)(dppf)Br]PF₆ (2), [Ru(¦Ç⁶-C₁₀H₁₄)(dppf)I]PF₆ (3), [Ru(¦Ç⁶-C₁₀H₁₄)(dppf)SnF₃]PF₆ (4) and [Ru(¦Ç⁶-C₁₀H₁₄)(dppf)Cl][SnCl₃]¡¤0.45CH₂Cl₂ (5) complexes by its reactions with KBr, KI, SnF₂ and SnCl₂, respectively. All of the compounds were characterized by NMR, IR, ⁵⁷Fe and ¹¹⁹Sn-M?ssbauer spectroscopy, and cyclic voltammetry. The single-crystal X-ray structure analysis of the [Ru(¦Ç⁶-C₁₀H₁₄)(dppf)Cl][SnCl₃]¡¤0.45CH₂Cl₂ complex revealed the expected piano-stool geometry. Cyclic voltammograms of the complexes showed only one quasi-reversible electrochemical process, involving the oxidation of Fe(II) and Ru(II) at the same potential, which was confirmed by exhaustive electrolysis experiments. ⁵⁷Fe-M?ssbauer parameters obtained for the complexes (1-5) were fitted with one doublet corresponding to a site of one iron(II). The ¹¹⁹Sn-M?ssbauer parameters of the complex (4) indicate that tin is tetra covalent.