Table 7.
Optimized O...O distances using CP-OPT (Å) for water dimer
| Basis | B3LYP | M05 | M05-2X | M06 | M06-2X | B2PLYP | B2PLYPD | X3LYP | MPWB1K | B97D | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Functions | |||||||||||
| aug-cc-pV5Z | 574 | 2.921 | 2.922 | 2.917 | 2.912 | 2.900 | 2.916 | 2.893 | 2.907 | 2.916 | 2.940 |
| cc-pV5Z | 402 | 2.924 | 2.924 | 2.919 | 2.919 | 2.909 | 2.917 | 2.896 | 2.910 | 2.918 | 2.944 |
| aug-cc-pVQZ | 344 | 2.921 | 2.922 | 2.918 | 2.911 | 2.900 | 2.916 | 2.893 | 2.907 | 2.916 | 2.940 |
| cc-pVQZ | 230 | 2.935 | 2.933 | 2.926 | 2.920 | 2.910 | 2.930 | 2.908 | 2.920 | 2.926 | 2.957 |
| aug-cc-pVTZ | 184 | 2.923 | 2.915 | 2.920 | 2.913 | 2.907 | 2.918 | 2.895 | 2.909 | 2.918 | 2.942 |
| 6-311++G(3df,2p) | 118 | 2.934 | 2.920 | 2.931 | 2.911 | 2.909 | 2.936 | 2.915 | 2.919 | 2.928 | 2.953 |
| cc-pVTZ | 116 | 2.950 | 2.934 | 2.947 | 2.930 | 2.929 | 2.950 | 2.929 | 2.935 | 2.939 | 2.971 |
| aug-cc-pVDZ | 82 | 2.927 | 2.919 | 2.935 | 2.913 | 2.913 | 2.938 | 2.914 | 2.913 | 2.922 | 2.942 |
| 6-311++G(d,p) | 72 | 2.941 | 2.923 | 2.937 | 2.911 | 2.920 | 2.958 | 2.937 | 2.925 | 2.935 | 2.964 |
| D95++(d,p) | 64 | 2.910 | 2.911 | 2.920 | 2.903 | 2.909 | 2.933 | 2.908 | 2.895 | 2.913 | 2.924 |
| 6-31++G(d,p) | 62 | 2.934 | 2.928 | 2.938 | 2.924 | 2.920 | 2.951 | 2.927 | 2.920 | 2.922 | 2.943 |
| 6-311G(d,p) | 60 | 2.978 | 2.960 | 2.961 | 2.938 | 2.948 | 2.989 | 2.972 | 2.964 | 2.958 | 3.018 |
| D95(d,p) | 52 | 2.892 | 2.901 | 2.898 | 2.892 | 2.893 | 2.914 | 2.895 | 2.882 | 2.893 | 2.903 |
| 6-31G(d,p) | 50 | 2.937 | 2.933 | 2.934 | 2.923 | 2.921 | 2.948 | 2.929 | 2.927 | 2.919 | 2.948 |
| cc-pVDZ | 48 | 2.982 | 2.967 | 2.977 | 2.952 | 2.965 | 2.996 | 2.978 | 2.968 | 2.963 | 3.011 |
| 6-31G(d) | 38 | 2.912 | 2.915 | 2.909 | 2.912 | 2.893 | 2.926 | 2.905 | 2.900 | 2.896 | 2.914 |