Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology | |
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You are here: Calculated > Vibrations > Bad Calculations > Bad vib. Calc. vs exp. OR Resources > Bad Calculations > Vibrations > Bad vib. Calc. vs exp. |
Calculated frequencies that differ from experiment by more than 400 cm-1 or have a ratio with experiment outside of 0.7 to 1.2 are listed
Calculated vibrational frequencies ("theory" in table) are calculated at
CCD/cc-pVQZ
Calculated values were scaled by 1.
Species | Name | mode | int rot | Symmetry | Experiment | Theory | difference | ratio |
---|---|---|---|---|---|---|---|---|
H2O | Water | 1 | A1 | 3657 | 2430 | -1227 | 1.505 | |
H2O | Water | 3 | B2 | 3756 | 2546 | -1210 | 1.475 | |
NO | Nitric oxide | 1 | Σ | 1876 | 2618 | 742 | 0.716 | |
Mg2 | Magnesium diatomic | 1 | Σg | 48 | 29 | -19 | 1.634 |