∞ , Helgaker FIG. : Box plots of the differences |∆E HF GTO -∆E HF PW | between extrapolated GTO and PW HF interaction energies of the S22* test systems. Medians are shown as horizontal black lines and yellow lines stand for the mean absolute error (MAE). The dashed(solid) red lines correspond to the smallest MAE(maximum deviation) obtained with plain Q and 5 zeta basis sets reported in Table . The legend is given in Fig. . Signed deviations are also provided in Fig. .