H. Nmr,

, Cl 2 was added dropwise to a solution of lithium bis(trifluoromethylsulfonyl)imide. The solution was stirred at room temperature overnight. After concentration, the organic phase was washed several times with water until the

N. Bis, The procedure used for

H. Nmr,

, Triethylammonium bis(trifluoromethylsulfonyl)imide

, Water content: 15 ppm. 1 H NMR (CD 2 Cl 2 ): ? 1

, A solution of NaBF 4 and [BMIm][Cl] was vigorously stirred at room temperature for 4 days in CH 2 Cl 2. The reaction mixture was filtered and concentrated on a Rotavapor. The obtained viscous liquid was dissolved in water and extracted by CH 2 Cl 2. The CH 2 Cl 2 was then evaporated and

H. Nmr,

, OTf] was obtained as a colorless viscous liquid (86% yield)

, Cl] was vigorously stirred at room temperature for 4 days in dichloromethane. The reaction mixture was filtered and concentrated on a Rotavapor. The obtained viscous liquid was dissolved in dichloromethane and NaCl was extracted by water. The CH 2 Cl 2 was then evaporated

L. Magna, About the Acidity-Catalytic Activity
URL : https://hal.archives-ouvertes.fr/hal-02001586

, butyl-3-methylimidazolium hexafluoro-antimonate [BMIm

, Water content: 15 ppm. 1 H NMR (CD 2 Cl 2 ): ? 0

, A freshly distilled 1-methylimidazole was added dropwise to 1 equivalent of butanesultone in dry toluene. The solution was stirred for 1h at room temperature and refluxed for 12 h. A precipitate formed. It was filtered, washed repeatedly with toluene and Et 2 O. The product was then dried under vacuum at 40°C. The zwitterion [MeIm(CH 2 ) 4 SO 3 ] was obtained as a white solid

, Dropwise addition of 1 eq of HOTf to [MeIm(CH 2 ) 4 SO 3 ] in dry toluene yields to the formation of an oily product which was repeatedly washed with toluene and finally dried under vacuum

H. Nmr,

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