Calorimetric quantification of the hydrogen-bond acidity of solvents and its relationship with solvent polarity
Abstract
A new solvent polarity–polarizability scale (SPP) has been used to reevaluate the hydrogen-bond acidity scale of organic solvents previously reported and has been extended to a new set of solvents. The hydrogen-bond acidity, expressed as the enthalpy term ΔacidH, has been evaluated by measuring the differences between the solvation enthalpies of N-methylimidazole and N-methylpyrrole in these solvents along with the solvent polarity–polarizability (SPP) values. The ΔacidH values for 63 solvents are reported.