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Toward a p K a Scale of N-base Amines in Ionic Liquids

2014; American Chemical Society; Volume: 118; Issue: 16 Linguagem: Inglês

10.1021/jp501082t

1520-6106

Daniela Millán, Mabel Rojas, José G. Santos, Javiera Morales, Maurício Isaacs, Carlos Díaz, Paulina Pávez,

Chemical and Physical Properties in Aqueous Solutions

An electrochemical technique was used to investigate pKa values of some substituted secondary alicyclic (SA) amines, pyridines (py), anilines (AN), and triethylamine (Et3N) in different ionic liquids. The method involves cyclic voltammetry at a platinized Pt electrode. The experimental data were correlated with pKa values reported previously in aqueous solution, and Hammett parameters were correlated with pKa values in ionic liquids to determine ρ values in these media.