Table 2:

FreeSolv database version 0.52: experimental hydration free energies for small neutral molecules.

Number of molecules in the dataset	642
Average number of heavy (non-H) atoms	8 ± 4.5
Largest molecule number of atoms (non-H)	24
Average hydration free energy, μ ± σ	−3.80 ± 3.85 kcal/mol
Hydration free energy range	(−25.47, 3.43) kcal/mol
Average experimental uncertainty, μ ± σ	0.57 ± 0.31 kcal/mol
Experimental uncertainty range	(0.03, 1.93) kcal/mol
Elements (most to least frequent)	H, C, O, Cl, N, F, S, Br, P, I