Condensed descriptors for reactivity: A methodological study

► Condensed Fukui functions and dual descriptor for a set of organic molecules. ► No correlation between finite difference approach and Koopmans approximation. ► Good correlation between Bader's and Hirschfeld's condensed values. ► Pathological differences found for diffuse f+. ► Larger span of Bader's values fostering the use of QTAIM in reactivity studies.