I have optimized the geometry of a heteromolecular complex and applied counterpoise corrections to calculate the theoretical frequencies. I need to find the interaction energy of this complex. Usually for calculating the interaction energy, we need to use the value corresponding to the sum of electronic and zero point energies in the output file. But in my Gaussian output file, I could see another value corresponding to the counterpoise corrected energy. Which one should I use for calculating the interaction energy of the complex? Is it the counterpoise corrected energy or the sum of electronic and zero point energy? Can anyone explain the difference between the two? Thanks in advance