Preparation and Selectivity Characteristics of FluorocarbonaceousBonded Stationary Phase for Reverse-Phase H igh-PerformanceLiquid Chromatography

1H, 1H, 2H, 2H, 3H, 3H-Tridecafluoro (4, 4-dimethylheptyl)silanes [3a-3c] were prepared from the corresponding polyfluoroalkene [1] and silanes HSiXY2 {2a; X=Y =C1, 2b X=C1, Y=CH3, 2c; X=Y=OCH3} in the presence of hexachloroplatinic(IV) acid in good yields (71-90%; Scheme 1 and Table 1). The product silanes [3a, 3b] and Dimethyl(1H, 1H, 2H, 2H-tridecafluorooctyl)-chlorosilane [4] were used to prepare the corresponding new-type branched- and straight-fluorocarbonaceous bonded stationary phase (PES) for reverse-phase high-performance liquid chromatography (RP-HPLC).