The condensed Fukui functions have been calculated using the Mulliken
population analysis (MPA) and natural population analysis (NPA) scheme
s for the molecules BH2F, BH2Cl and trans and cis forms of the FC(O)OF
and nitrosoethylene molecules and another isomer of nitrosoethylene,
oxazete. The changes in the relative reactive sites of these molecules
due to the MPA and NPA schemes have been reported. The basis set depe
ndence of the condensed Fukui functions have also been studied. The co
ncept of a larger condensed Fukui function for higher reactivities has
been verified for the nitrosoethylene molecule.