While our model can accurately estimate the interaction energies of all the dimers of identical molecules we have shown thus far, it fails (when calibrated exclusively with interaction energies of neutral water molecules) to do so for the interaction energy of (O 2 + O 2 ) -as shown in Figure , thus, using our model to estimate interaction energies between molecules which are not part of its calibration set needs to be done carefully. Nonetheless, our numerical experiments suggest that our model can accurately estimate interaction energies between specific dimers, that is, for every type of dimer considered in some molecular dynamics' simulation a set of different coefficients a k and b k (Equation ) can be used for different dimer interactions. However, this approach would still require us to either possess reliable experimental data to calibrate our model for each type of dimer interaction or perform expensive, yet accurate, ab initio calculations for the same matter.