Viscosity measurements on aniline, p-toludine and p-anisidine + phénol in the temperature range of 303.15-343.15 K

Densities and viscosities of the binary mixtures aniline, p-toluidine and p-aninisidine + phenol between 303.15 and 343.15 K, in the whole range of composition were determined. Experimental results for excess viscosities at 323.15, 333.15 and 343.15 were fitted to Grundberg and Nissan's equation. From the excess viscosity, the δ parameters of the Grundberg-Nissan equation and the activation energies is concluded that interaction between the anilines and phenol increases in the sequence aniline p-toluidine p-anisidine, which is in line with the basicity of the compounds. The basicity of the anilines can be explained in terms of both inductive and mesomeric effects