A deeper inspection of the "optimal solutions" provided by Swarm-CG revealed interesting patterns. In particular, it is interesting to observe that the dipole moment of all the models belonging to this minimum is identical. Namely, despite the fact that their geometry or partial charges can be slightly larger/smaller (Figure ) in the various solutions, these change in such a way that the dipole moment the molecule is conserved. In such a way, the enthalpy of vaporization is also conserved across the various solutions (Figure ).