GAS-LIQUID-CHROMATOGRAPHY OF PERFLUOROCARBOXYLIC THIOESTERS .2. SORPTION CHARACTERISTICS

Perfluorocarboxylic thioesters RFC(O)SR (R-F = CF3(CF2)(j), R = CH3(CH 2)(i), i and j = 0-5) were studied for the first time by GLC on packed columns using SE-30, SKTFT-50X, and XE-60 as the stationary phase. Th e values of thermodynamic functions of sorption were calculated. The c orrelations between these functions and the molecular structures as we ll as the conditions of analysis were established. The insertion of th e S atom into the molecules of derivatives of perfluorocarboxylic acid s causes a decrease in the contribution of the orientation interaction and an increase in the dispersion interaction of thioesters with the stationary phases compared to esters and amides of perfluorocarboxylic acids studied previously.