(AM1),(PM3) and HartreeFock in basis set (HF/STO-3G). The practical values (Log P) were
predicted depending on the physical properties of the drugs compounds. The physico-
chemical data were evaluated theoretically (ie LUMO, HOMO, entropy, Gibbs free energy,…
etc) and used to find the lipophilicity. An excellent correlation was obtained between the
theoretical and the experimental values.