Hydrogen-Bond Acceptance of Solvents: A ¹⁹F Solvatomagnetic β₁ Database to Replace Solvatochromic and Solvatovibrational Scales

A variety of physicochemical properties and several hydrogen-bond donors have been used to define methods build scales aiming at measuring the acceptance solvents. There is a great deal confusion in these methods. Solvatochromic, solvatocalorimetric, solvatovibrational, 19 F solvatomagnetic comparison are critically reviewed. Only two methods, solvatocalorimetric ones, able yield reliable solvent basicity scales. The β 1 scale defined from chemical shift 4-fluorophenol extended many solvents including ionic liquids green results for about 240 hydrogenbond acceptor organized numerical database. with