An analogous inspection of the hydrogen bonded configurations (Figure ) provides a slightly different picture. All models except UFF predict accurately attractive and moderately repulsive energies but only MMFF94s our model reproduces the repulsive region of the interaction energy in this reaction coordinate accurately, with the results of our model being significantly closer results to the ab initio reference data. Fig. . Interaction energy of a water dimer in the O -H reaction coordinate shown in Figure (θ = π) obtained from ab initio calculations (singlets) using CCSD(T)/cc-pVTZ level of theory and several force field models including ours with an order ten correction.