| Version | 2023.06 |
| Tag | 56801 |
| Molecule - Descriptor | Methyl ketene, 1-Propen-1-one (CH3CHCO) - vt=0, 1 |
| Isotope | parent |
| Hyperfine | N/A |
| Lines in DB | 22733 |
| Frequency max. (MHz) | 599982.6842 |
| J max. | 76 |
| Cite these data as | Fuentetaja R., Bermúdez C., Cabezas C., Agúndez M., Tercero B., Marcelino N., Pardo J.R., Margules L., Motiyenko R.A., Guillemin J.-C., et al. 2023, A&A, 671, L6 https://doi.org/10.1051/0004-6361/202245732 |
| T(K) | Qt | Qrot | Qvib |
|---|---|---|---|
| 310.0 | 331001.741 | 157051.5 | 2.1076 |
| 300.0 | 294784.540 | 145976.3 | 2.0194 |
| 290.0 | 262026.388 | 135351.2 | 1.9359 |
| 280.0 | 232452.018 | 125176.1 | 1.857 |
| 270.0 | 205789.803 | 115450.1 | 1.7825 |
| 260.0 | 181787.356 | 106171.8 | 1.7122 |
| 250.0 | 160210.820 | 97339.34 | 1.6459 |
| 240.0 | 140860.872 | 88949.78 | 1.5836 |
| 230.0 | 123524.756 | 80999.84 | 1.525 |
| 220.0 | 108023.641 | 73485.47 | 1.47 |
| 210.0 | 94197.735 | 66401.9 | 1.4186 |
| 200.0 | 81878.659 | 59743.64 | 1.3705 |
| 190.0 | 70925.486 | 53504.44 | 1.3256 |
| 180.0 | 61217.615 | 47677.27 | 1.284 |
| 170.0 | 52619.255 | 42254.28 | 1.2453 |
| 160.0 | 45029.513 | 37226.78 | 1.2096 |
| 150.0 | 38346.205 | 32585.15 | 1.1768 |
| 140.0 | 32476.034 | 28318.83 | 1.1468 |
| 130.0 | 27336.422 | 24416.24 | 1.1196 |
| 120.0 | 22848.977 | 20864.74 | 1.0951 |
| 110.0 | 18944.335 | 17650.55 | 1.0733 |
| 100.0 | 15558.695 | 14758.77 | 1.0542 |
| 90.0 | 12634.689 | 12173.32 | 1.0379 |
| 80.0 | 10118.957 | 9876.971 | 1.0245 |
| 70.0 | 7962.123 | 7851.418 | 1.0141 |
| 60.0 | 6119.330 | 6077.396 | 1.0069 |
| 50.0 | 4546.314 | 4534.977 | 1.0025 |
| 40.0 | 3206.401 | 3204.478 | 1.0006 |
| 30.0 | 2069.497 | 2069.497 | 1.0 |
| 20.0 | 1125.664 | 1125.664 | 1.0 |
| 10.0 | 398.865 | 398.865 | 1.0 |
Details: Each level is characterized by the usual asymmetric top quantum numbers
J, Ka, and Kc, and the free rotor quantum number m.
When table includes hyperfine levels, standard F = J+I quantum number is added to the labeling.
The correspondence between
m quantum number in .cat file and the vibrational torsional quantum number vt and symmetry species Γ = A or E
of C3v symmetry point group is given in the table →
| m | vt | Γ |
|---|---|---|
| 0 | 0 | A |
| 1 | 0 | E |
| -3 | 1 | A |
| -2 | 1 | E |
| 3 | 2 | A |
| 4 | 2 | E |
| -6 | 3 | A |
| -5 | 3 | E |
| 6 | 4 | A |
| 7 | 4 | E |
Lille Spectroscopic Database