2,4-Cyclopentadiene-1-one
- Formula: C5H4O
- Molecular weight: 80.0847
- IUPAC Standard InChI: InChI=1S/C5H4O/c6-5-3-1-2-4-5/h1-4H
- IUPAC Standard InChIKey: FQQOMPOPYZIROF-UHFFFAOYSA-N
- CAS Registry Number: 13177-38-3
- Chemical structure:
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Vibrational and/or electronic energy levels
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: Marilyn E. Jacox
State: ?
| Energy (cm-1) |
Med. | Transition | λmin (nm) |
λmax (nm) |
References | ||
|---|---|---|---|---|---|---|---|
| Tx = 51300 | Ar | Maier, Franz, et al., 1985 | |||||
State: ?
| Energy (cm-1) |
Med. | Transition | λmin (nm) |
λmax (nm) |
References | ||
|---|---|---|---|---|---|---|---|
| Tx = 27800 | Ar | Maier, Franz, et al., 1985 | |||||
State: X
| Vib. sym. |
No. | Approximate type of mode |
cm-1 | Med. | Method | References | |
|---|---|---|---|---|---|---|---|
| 1870 | w m | Ar | IR | Maier, Franz, et al., 1985 Maier, 1986 | |||
| 1789 | w | Ar | IR | Maier, Franz, et al., 1985 Maier, 1986 | |||
| 1727 | vs | Ar | IR | Maier, Franz, et al., 1985 Maier, 1986 | |||
| 1724 | vs | Ar | IR | Maier, Franz, et al., 1985 | |||
| 1678 | w m | Ar | IR | Maier, Franz, et al., 1985 Maier, 1986 | |||
| 1332 | s | Ar | IR | Maier, Franz, et al., 1985 Maier, 1986 | |||
| 1136 | s | Ar | IR | Maier, Franz, et al., 1985 Maier, 1986 | |||
| 1068 | w m | Ar | IR | Maier, Franz, et al., 1985 Maier, 1986 | |||
| 822 | vs | Ar | IR | Maier, Franz, et al., 1985 Maier, 1986 | |||
| 632 | s | Ar | IR | Maier, Franz, et al., 1985 Maier, 1986 | |||
| 458 | w m | Ar | IR | Maier, Franz, et al., 1985 Maier, 1986 | |||
Additional references: Jacox, 1994, page 419
Notes
| w | Weak |
| m | Medium |
| s | Strong |
| vs | Very strong |
| x | Energy separation between the band maximum of the excited electronic state and the v = 0 level of the ground state. |
References
Go To: Top, Vibrational and/or electronic energy levels, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Maier, Franz, et al., 1985
Maier, G.; Franz, L.H.; Hartan, H.-G.; Lanz, K.; Reisenauer, H.P.,
Kleine Ringe, 54. Cyclopentadienon,
Chem. Ber., 1985, 118, 8, 3196, https://doi.org/10.1002/cber.19851180819
. [all data]
Maier, 1986
Maier, G.,
From silabenzene to cyclopropenylidene,
Pure Appl. Chem., 1986, 58, 1, 95, https://doi.org/10.1351/pac198658010095
. [all data]
Jacox, 1994
Jacox, M.E.,
Vibrational and electronic energy levels of polyatomic transient molecules, American Chemical Society, Washington, DC, 1994, 464. [all data]
Notes
Go To: Top, Vibrational and/or electronic energy levels, References
- Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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