The additivity rule model together with the complex optical modelpotential correlated by the concept of bonded atoms, which considers theoverlapping effect of electron clouds between two atoms in a molecule,is firstly employed to calculate the absolute differential crosssections for electrons scattered by carbon monoxide at intermediate andhigh energies at the Hartree–Fock level. A comparison of elasticdifferential cross section results, obtained by using the correlatedcomplex optical model potential, with the available experimental data,shows a significant improvement over the uncorrelated ones. Thedifferential cross sections obtained by using the correlated complexoptical model potential are in very good agreement with the experimentaldata. It is shown that the additivity rule model together with thecorrelated complex optical model potential is suitable for thecalculations of the absolute differential cross sections of e-COscattering.