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Yushi Nakamura, Misato Wakabayashi, Koichiro Sadakane, Tetsuo Ohta, Yohei Oe, Synthesis of Cationic Sandwich-type Ruthenium Complexes with η6-Arene Ligands Bearing Long Alkyl Chains and Their Behavior in Water, Chemistry Letters, Volume 51, Issue 9, September 2022, Pages 936–939, https://doi.org/10.1246/cl.220247
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Abstract
Novel sandwich-type ruthenium complexes [Ru(η6-arene)(p-cymene)](BF4)2, in which the η6-arene ligands have long alkyl chains, were prepared. These complexes were dispersed in water to form corresponding micelles. Alkoxy moieties on the η6-arene ligands were reacted with OH− to afford the corresponding phenolic species. Thus, [Ru(p-undecyloxyanisole)(p-cymene)]2+ was converted to [Ru(η6-p-methoxyphenolate)(p-cymene)]+ through the unexpected demethylation by treatment with Na2CO3 with the micelle remaining. The micelle collapsed when similar ruthenium complex bearing dodecyl 2-(4-methoxyphenoxy)acetate as an arene ligand was treated with Na2CO3 aq.