Water-like behavior of 1,2-ethanediol in binary mixtures with pyridine and its methyl derivatives: Thermodynamic excesses and the O-H⋯N bonds energy

► Methyl groups in the pyridine ring strengthen the 1:1 complexes of the amines with 1,2-ethanediol. ► Correlation: association energy - excess volume and compressibility. ► Positive contribution to the excess expansibility due to aggregation of the 1:1 complexes. ► Solvent-induced aggregation similar to that in aqueous solutions.