Comparative Study of Topological and Linear Free Energy-Related Parameters for the Prediction of GC Retention Indices

Abstract The different molecular connectivity indices were considered as to their capacity for describing GC retention indices of a data set consisting of molecules of different chemical families. 1 χ describes best the chromatographic behavior on nonpolar stationary phases, whereas 3 χ P in combination with an electronic parameter (σ) yields the best results when using the polar stationary phases.