Synthesis and Structures of Triple-Decker Complexes with a Bridging Tetramethylcyclopentadienyl Ligand

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• 作者：Sonam K. Ghag ; Michael L. Tarlton ; Ernst A. Henle ; Elizabeth M. Ochoa ; Alex W. Watson ; Lev N. Zakharov ; Eric J. Watson
• 刊名：Organometallics
• 出版年：2013
• 出版时间：March 25, 2013
• 年：2013
• 卷：32
• 期：6
• 页码：1851-1857
• 全文大小：378K
• 年卷期：v.32,no.6(March 25, 2013)
• ISSN：1520-6041

文摘

New triple-decker complexes with bridging tetramethylcyclopentadienyl ligands were synthesized by the reaction of electrophilic metal fragments with octamethylferrocene, Cp鈥?sub>2Fe (Cp鈥?= C₅Me₄H). The reaction of coordinatively unsaturated ruthenium cations [(C₅R₅)Ru]⁺ (R = H, CH₃) with Cp鈥?sub>2Fe afforded purple-colored heterometallic triple-decker complexes [(C₅R₅)Ru(渭-Cp鈥?FeCp鈥瞉⁺ by direct electrophilic addition. Surprisingly, the analogous reaction with the coordinatively unsaturated manganese cation [Mn(CO)₃]⁺ and Cp鈥?sub>2Fe produced a blue homometallic triple-decker complex, [Cp鈥睩e(渭-Cp鈥?FeCp鈥瞉⁺, by ring abstraction and subsequent addition of the newly generated cation [Cp鈥睩e]⁺ to an equivalent of Cp鈥?sub>2Fe. Three air-stable triple-decker complexes, [Cp鈥睩e(渭-Cp鈥?FeCp鈥瞉⁺ (2), [CpRu(渭-Cp鈥?FeCp鈥瞉⁺ (3), and [Cp*Ru(渭-Cp鈥?FeCp鈥瞉⁺ (4), have been characterized by NMR spectroscopy, elemental analysis, and single-crystal X-ray diffraction.