Separation and identification of phenothiazine compounds by thin-layer chromatography

The chromatographic behavior of phenothiazine derivatives is studied by thin-layer chromatography with the use of Sorbfil silica gel plates in a binary benzene-methanol mixture of solvents. An empirical equation describing the dependence of the retention value (mobility R _f ) of the substance on the physicochemical properties of the eluent is proposed. The effect of interactions of different types on the value of their chromatographic retention is estimated; the relation of the obtained coefficients of equations for the substances under study is analyzed. The obtained empirical dependences are used to calculate the R _f values. The discrepancy between the calculated and experimental data is below 0.07.