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Is Amine a Stronger Base in Ionic Liquid Than in Common Molecular Solvent? An Accurate Basicity Scale of Amines
Chong Mao1, Zhen Wang1, Pengju Ji1
1†Center of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing 100084, China.
Abstract:
The equilibrium basicities of 21 frequently used amines in two room-temperature ionic liquids (RTILs) were measured precisely. The standard deviation was much superior to that sparsely reported elsewhere. The data comparisons revealed that amines are stronger bases in ionic ligquids than in DMSO and water but weaker base than in acetonitrile (AN). Interestingly, regression analyses demonstrate that the basicity scales obtained in two RTILs correlate well with that in AN but not with those in water and DMSO.
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