C5O2
- Formula: C5O2
- Molecular weight: 92.0523
- IUPAC Standard InChI: InChI=1S/C5O2/c6-4-2-1-3-5-7
- IUPAC Standard InChIKey: BKMBQDLZBSCFGV-UHFFFAOYSA-N
- CAS Registry Number: 51799-36-1
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: Pentacarbon dioxide
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Phase change data
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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: William E. Acree, Jr., James S. Chickos
Enthalpy of vaporization
| ΔvapH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 1.1 | 258. | A | Stephenson and Malanowski, 1987 | Based on data from 186. to 273. K. See also Klemenc and Wagner, 2006. |
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 | ||
|---|---|---|---|---|---|---|---|
| Txd = 43500 | Ar | Maier, Reisenauer, et al., 1988 | |||||
State: X
| Vib. sym. |
No. | Approximate type of mode |
cm-1 | Med. | Method | References | |
|---|---|---|---|---|---|---|---|
| Σu+ | 4 | 2242.13 | gas | IR | Holland, Winnewisser, et al., 1988 Petry, Klee, et al., 2002 | ||
| 4 | 2213.0 | vs | Ar | IR | Maier, Reisenauer, et al., 1988 | ||
| 5 | 2065.56 | gas | IR | Holland, Winnewisser, et al., 1988 Petry, Klee, et al., 2002 | |||
| 5 | 2058.7 | m | Ar | IR | Maier, Reisenauer, et al., 1988 | ||
| 6 | 1152 | gas | IR | Holland, Winnewisser, et al., 1988 | |||
| 6 | 1144.1 | w | Ar | IR | Maier, Reisenauer, et al., 1988 | ||
| Πu | 9 | 542 | gas | IR | Holland, Winnewisser, et al., 1988 | ||
| 9 | 539.0 | w | Ar | IR | Maier, Reisenauer, et al., 1988 | ||
| 10 | 474 | gas | IR | Holland, Winnewisser, et al., 1988 | |||
| 10 | 470.0 | w | Ar | IR | Maier, Reisenauer, et al., 1988 | ||
Additional references: Jacox, 1994, page 370
Notes
| w | Weak |
| m | Medium |
| vs | Very strong |
| x | Energy separation between the band maximum of the excited electronic state and the v = 0 level of the ground state. |
| d | Photodissociation threshold |
References
Go To: Top, Phase change data, 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.
Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw,
Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2
. [all data]
Klemenc and Wagner, 2006
Klemenc, Alfons; Wagner, Georg,
Pentacarbondioxyd, O:C:C:C:C:C:O,
Ber. dtsch. Chem. Ges. A/B, 2006, 70, 9, 1880-1882, https://doi.org/10.1002/cber.19370700909
. [all data]
Maier, Reisenauer, et al., 1988
Maier, G.; Reisenauer, H.P.; Schafer, U.; Balli, H.,
C5O2 (1,2,3,4-Pentatetraen-1,5-dion), ein neues Oxid des Kohlenstoffs,
Angew. Chem., 1988, 100, 4, 590, https://doi.org/10.1002/ange.19881000421
. [all data]
Holland, Winnewisser, et al., 1988
Holland, F.; Winnewisser, M.; Maier, G.; Reisenauer, H.P.; Ulrich, A.,
The high-resolution Fourier transform infrared spectrum of the ν4 band system of OCCCCCO,
J. Mol. Spectrosc., 1988, 130, 2, 470, https://doi.org/10.1016/0022-2852(88)90094-X
. [all data]
Petry, Klee, et al., 2002
Petry, R.; Klee, S.; Lock, M.; Winnewisser, B.P.; Winnewisser, M.,
Spherical mirror multipass system for FTIR jet spectroscopy: application to the rovibrationally resolved spectrum of OC5O,
J. Mol. Struct., 2002, 612, 2-3, 369, https://doi.org/10.1016/S0022-2860(02)00146-1
. [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, Phase change data, Vibrational and/or electronic energy levels, References
- Symbols used in this document:
ΔvapH Enthalpy of vaporization - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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