Interaction energy in pairs of phthalazinium dibenzoylmethylid (PDBM)-protic solvent molecules estimated in the limits of the cell ternary solution model, by spectral means

► The cell model of ternary solutions was applied to homogeneous solutions of PDBM. ► The active solvent average statistic weight in the first salvation sphere of PDBM was computed. ► The hydrogen bond energy in pairs PA-PDBM and O-PDBM was estimated.