basic, neutral or acidic ionic liquids, exemplified by the well-researched haloaluminates. In addition we can make protic acidic liquids which are simultaneously of any Lewis aspect.12 How is proton chemistry in ionic liquids related to proton chemistry in water? First, acidic protons in ionic liquids often occur as anions, e.g., HCl 2-, HBr 2, H 2Br 3, rather than cations. Second, protons bonded to bases such as pyridine and l-methylimidazole are not labile.13 Do these bases behave in line with their pk bâs in water? No. Bases in ionic