The next test of the potential function is the interaction energy of the ACN dimers along the dissociation curves for the two lowest energy dimer configurations, 'head-to-head' and 'head-to-tail'. Figure shows the potential energy curves of the ACN dimers calculated with the QM, point charge and SCME model. The curves in Figure have been computed using frozen monomer geometries at di↵erent COM-separations between the monomers, R. For both dimers, the new SCME potential matches the DFT calculations well, whereas the point charge potential is too repulsive at short distances.