First, the results of DFT calculations using different functionals and any of the tested dispersion corrections are very close to each other, as was also the case for the dimers. Secondly, the application of any dispersion treatment to a particular functional once again improves the agreement to the reference B3LYP-D3(BJ) values. In general, the minimum energy, V min , of the DFT-D3(BJ) and DFT-D4 are compatible, and that of DFT-NL is slightly more negative. Finally, in DFT calculations without a dispersion correction, V min improves as one ascends the Jacob's ladder.