1-Ethyl-3-methylimidazolium halogenoaluminate ionic liquids as solvents for Friedel–Crafts acylation reactions of ferrocene

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Abstract
Friedel–Crafts acylations of ferrocene in 1-ethyl-3-methylimidazolium halogenoaluminate ionic liquids, [emim]I–(AlCl3)x are described.3 The effect of varying the “bulk” Lewis acidity of the ionic liquids used as solvents in these reactions and the effect of varying the relative amounts of acylating agent with respect to the amount of ferrocene in these reactions is also described. The use of a variety of different acylating agents in our studies demonstrates the scope of this reaction performed in these ionic liquid systems.