Density functional: PW91P86
Reference values and deviations (result - reference) of the respective functional 
w/o dispersion correction, D3(0) dispersion correction, and D3(BJ) dispersion correction in kcal/mol. 
| # | Systems | Stoichiometry | Ref. | without | D3(0) | ||
|---|---|---|---|---|---|---|---|
| 1 | R20 | P20 | -1 | 1 | -3.3 | 2.20 | 2.06 | 
| 2 | R21 | P20 | -1 | 1 | 4.4 | 1.68 | 1.55 | 
| 3 | R22 | P22 | -1 | 1 | -5.9 | 1.36 | 1.08 | 
| 4 | R25 | P25 | -1 | 1 | -4.8 | 2.62 | 2.39 | 
| 5 | R26 | P26 | -1 | 1 | -2.5 | 2.29 | 2.12 | 
| 6 | R28 | P26 | -1 | 1 | 4.0 | 1.74 | 1.58 | 
| 7 | R29 | P25 | -1 | 1 | 4.5 | 1.79 | 1.55 | 
| 8 | R40 | P40 | -1 | 1 | 1.7 | 0.69 | 0.82 | 
| 9 | R43 | P43 | -1 | 1 | 2.9 | 0.58 | 0.69 | 
| 10 | R44 | P44 | -1 | 1 | 3.7 | 2.24 | 2.00 | 
| 11 | R45 | P45 | -1 | 1 | 1.2 | 1.19 | 1.13 | 
| 12 | R46 | P46 | -1 | 1 | 3.7 | 2.01 | 1.75 | 
| 13 | R47 | P47 | -1 | 1 | 3.8 | 2.37 | 2.12 | 
| 14 | R48 | P48 | -1 | 1 | 4.4 | 2.23 | 1.88 | 
| 15 | R49 | P49 | -1 | 1 | 4.2 | 1.21 | 1.22 | 
| 16 | R51 | P51 | -1 | 1 | 1.6 | 0.25 | 0.46 | 
| 17 | R52 | P52 | -1 | 1 | 4.2 | 1.29 | 1.29 | 
| 18 | R56 | P56 | -1 | 1 | 5.9 | 1.74 | 1.76 | 
| 19 | R57 | P51 | -1 | 1 | 5.8 | 1.06 | 0.88 | 
| 20 | R60 | P60 | -1 | 1 | 8.6 | 1.69 | 1.47 | 
| MD | 1.61 | 1.49 | |||||
| MAD | 1.61 | 1.49 | |||||
| RMSD | 1.73 | 1.58 | |||||