Super acidic ionic liquids for arene carbonylation derived from dialkylimidazolium chlorides and MCl3 (M = Al, Ga, or In)

Ionic liquids, formed by combining 1 mol of 1-butyl-3-methyl-1H-imidazolium chloride, bmim+-Cl−, with 2 mol of a Group IIIA metal chloride (Al, Ga, In), were examined for toluene carbonylation reactivity to determine the effect for changing the M(III) cation. These ionic liquids were characterized for Brønsted acidity indirectly by 13C NMR of labeled acetone, CH3*COCH3. These results were explained by a mechanism where the Brønsted acidity of the ionic liquid was influenced by the strength of the Lewis acid: M3+Cl3.

Ionic liquids, formed by combining 1 mol of 1-butyl-3-methyl-1H-imidazolium chloride, bmim+-Cl−, with 2 mol of a Group IIIA metal chloride (Al, Ga, In), were examined for toluene carbonylation reactivity to determine the effect for changing the M(III) cation. These ionic liquids were characterized for Brønsted acidity indirectly by 13C NMR of labeled acetone, CH3*COCH3. These results were explained by a mechanism where the Brønsted acidity of the ionic liquid was influenced by the strength of the Lewis acid: M3+Cl3.Figure optionsDownload as PowerPoint slide