Table 5.
Uncorrected optimized O...O distances (Å) for water dimer.a
| Basis | B3LYP | M05 | M05-2X | M06 | M06-2X | B2PLYP | B2PLYPD | X3LYP | MPWB1K | B97D | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Functions | |||||||||||
| aug-cc-pV5Z | 574 | 2.919 | 2.918 | 2.909 | 2.902 | 2.894 | 2.906 | 2.883 | 2.905 | 2.912 | 2.931 |
| cc-pV5Z | 402 | 2.915 | 2.916 | 2.914 | 2.904 | 2.898 | 2.909 | 2.887 | 2.901 | 2.911 | 2.930 |
| aug-cc-pVQZ | 344 | 2.919 | 2.919 | 2.908 | 2.901 | 2.894 | 2.906 | 2.883 | 2.905 | 2.912 | 2.931 |
| cc-pVQZ | 230 | 2.913 | 2.916 | 2.911 | 2.903 | 2.899 | 2.904 | 2.882 | 2.899 | 2.907 | 2.927 |
| aug-cc-pVTZ | 184 | 2.912 | 2.908 | 2.918 | 2.902 | 2.895 | 2.907 | 2.884 | 2.897 | 2.913 | 2.931 |
| 6-311++G(3df,2p) | 118 | 2.918 | 2.919 | 2.912 | 2.900 | 2.890 | 2.911 | 2.888 | 2.904 | 2.911 | 2.929 |
| cc-pVTZ | 116 | 2.909 | 2.905 | 2.917 | 2.898 | 2.899 | 2.902 | 2.880 | 2.895 | 2.906 | 2.917 |
| aug-cc-pVDZ | 82 | 2.912 | 2.906 | 2.920 | 2.902 | 2.895 | 2.910 | 2.886 | 2.897 | 2.905 | 2.930 |
| 6-311++G(d,p) | 72 | 2.899 | 2.891 | 2.895 | 2.882 | 2.883 | 2.899 | 2.881 | 2.887 | 2.892 | 2.917 |
| D95++(d,p) | 64 | 2.879 | 2.885 | 2.888 | 2.880 | 2.878 | 2.884 | 2.866 | 2.867 | 2.881 | 2.891 |
| 6-31++G(d,p) | 62 | 2.886 | 2.890 | 2.895 | 2.886 | 2.877 | 2.888 | 2.871 | 2.874 | 2.880 | 2.894 |
| 6-311G(d,p) | 60 | 2.886 | 2.792 | 2.872 | 2.758 | 2.869 | 2.886 | 2.814 | 2.774 | 2.874 | 2.902 |
| D95(d,p) | 52 | 2.869 | 2.883 | 2.877 | 2.876 | 2.871 | 2.878 | 2.859 | 2.858 | 2.868 | 2.875 |
| 6-31G(d,p) | 50 | 2.785 | 2.793 | 2.856 | 2.773 | 2.855 | 2.882 | 2.810 | 2.773 | 2.868 | 2.866 |
| cc-pVDZ | 48 | 2.771 | 2.778 | 2.888 | 2.757 | 2.882 | 2.886 | 2.802 | 2.759 | 2.878 | 2.878 |
| 6-31G(d) | 38 | 2.777 | 2.788 | 2.746 | 2.768 | 2.734 | 2.874 | 2.805 | 2.767 | 2.857 | 2.849 |
Values in bold correspond structure B in figure 1.