H2CO+
- Formula: CH2O+
- Molecular weight: 30.0254
- CAS Registry Number: 54288-05-0
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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: C
Energy (cm-1) |
Med. | Transition | λmin (nm) |
λmax (nm) |
References | ||
---|---|---|---|---|---|---|---|
To = 43172 ± 11 | gas | Baker, Baker, et al., 1968 | |||||
Niu, Shirley, et al., 1993 | |||||||
Niu, Shirley, et al., 1993, 2 | |||||||
Vib. sym. |
No. | Approximate type of mode |
cm-1 | Med. | Method | References | |
---|---|---|---|---|---|---|---|
a1 | 1895 | T | gas | PE | Niu, Shirley, et al., 1993 Niu, Shirley, et al., 1993 | ||
1412 | T | gas | PE | Baker, Baker, et al., 1968 Niu, Shirley, et al., 1993 Niu, Shirley, et al., 1993, 2 | |||
State: B
Energy (cm-1) |
Med. | Transition | λmin (nm) |
λmax (nm) |
References | ||
---|---|---|---|---|---|---|---|
To = 39928 ± 6 | gas | Baker, Baker, et al., 1968 | |||||
Niu, Shirley, et al., 1993 | |||||||
Niu, Shirley, et al., 1993, 2 | |||||||
Vib. sym. |
No. | Approximate type of mode |
cm-1 | Med. | Method | References | |
---|---|---|---|---|---|---|---|
a1 | 2 | CO stretch | 1304 ± 4 | gas | PE | Baker, Baker, et al., 1968 Niu, Shirley, et al., 1993 Niu, Shirley, et al., 1993, 2 | |
State: A
Energy (cm-1) |
Med. | Transition | λmin (nm) |
λmax (nm) |
References | ||
---|---|---|---|---|---|---|---|
To = 25929 ± 5 | gas | Baker, Baker, et al., 1968 | |||||
Niu, Shirley, et al., 1993 | |||||||
Niu, Shirley, et al., 1993, 2 | |||||||
Vib. sym. |
No. | Approximate type of mode |
cm-1 | Med. | Method | References | |
---|---|---|---|---|---|---|---|
a1 | 1488 ± 4 | gas | PE | Niu, Shirley, et al., 1993 Niu, Shirley, et al., 1993, 2 | |||
1250 ± 4 | gas | PE | Baker, Baker, et al., 1968 Niu, Shirley, et al., 1993 Niu, Shirley, et al., 1993, 2 | ||||
b1 | 4 | OPLA | 263 ± 4 | gas | PE | Niu, Shirley, et al., 1993 Niu, Shirley, et al., 1993, 2 | |
State: X
Vib. sym. |
No. | Approximate type of mode |
cm-1 | Med. | Method | References | |
---|---|---|---|---|---|---|---|
a1 | 1 | CH stretch | 2580 ± 4 | gas | PE | Baker, Baker, et al., 1968 Niu, Shirley, et al., 1993 Niu, Shirley, et al., 1993, 2 | |
2 | CO stretch | 1675 ± 4 | gas | PE | Niu, Shirley, et al., 1993 Niu, Shirley, et al., 1993, 2 | ||
3 | CH2 scissors | 1210 ± 4 | gas | PE | Baker, Baker, et al., 1968 Niu, Shirley, et al., 1993 Niu, Shirley, et al., 1993, 2 Liu, Kim, et al., 2001 | ||
b1 | 4 | OPLA | 1036.5 ± 0.3 | gas | TPE | Schulenburg, Meisinger, et al., 2008 | |
b2 | 5 | CH2 a-stretch | 2718 ± 24 | gas | PE | Liu, Kim, et al., 2001 | |
6 | CH2 deform. | 823.7 ± 0.3 | gas | TPE | Schulenburg, Meisinger, et al., 2008 | ||
Additional references: Jacox, 1994, page 140; Jacox, 1998, page 223; Jacox, 2003, page 172; Cederbaum, Domcke, et al., 1975; Bombach, Dannacher, et al., 1981; Wiedmann, White, et al., 1994
Notes
T | Tentative assignment or approximate value |
o | Energy separation between the v = 0 levels of the excited and electronic ground states. |
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.
Baker, Baker, et al., 1968
Baker, A.D.; Baker, C.; Brundle, C.R.; Turner, D.W.,
The electronic structures of methane, ethane, ethylene and formaldehyde studied by high-resolution molecular photoelectron spectroscopy,
Intern. J. Mass Spectrom. Ion Phys., 1968, 1, 285. [all data]
Niu, Shirley, et al., 1993
Niu, B.; Shirley, D.A.; Bai, Y.; Daymo, E.,
High-resolution He Iα photoelectron spectroscopy of H2CO and D2CO using supersonic molecular beams,
Chem. Phys. Lett., 1993, 201, 1-4, 212, https://doi.org/10.1016/0009-2614(93)85058-V
. [all data]
Niu, Shirley, et al., 1993, 2
Niu, B.; Shirley, D.A.; Bai, Y.,
High resolution photoelectron spectroscopy and femtosecond intramolecular dynamics of H2CO+ and D2CO+,
J. Chem. Phys., 1993, 98, 4377. [all data]
Liu, Kim, et al., 2001
Liu, J.; Kim, H.-T.; Anderson, S.L.,
Multiphoton ionization and photoelectron spectroscopy of formaldehyde via its 3p Rydberg states,
J. Chem. Phys., 2001, 114, 22, 9797, https://doi.org/10.1063/1.1370943
. [all data]
Schulenburg, Meisinger, et al., 2008
Schulenburg, A.M.; Meisinger, M.; Radi, P.P.; Merkt, F.,
The formaldehyde cation: Rovibrational energy level structure and Coriolis interaction near the adiabatic ionization threshold,
J. Mol. Spectrosc., 2008, 250, 1, 44, https://doi.org/10.1016/j.jms.2008.04.005
. [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]
Jacox, 1998
Jacox, M.E.,
Vibrational and electronic energy levels of polyatomic transient molecules: supplement A,
J. Phys. Chem. Ref. Data, 1998, 27, 2, 115-393, https://doi.org/10.1063/1.556017
. [all data]
Jacox, 2003
Jacox, M.E.,
Vibrational and electronic energy levels of polyatomic transient molecules: supplement B,
J. Phys. Chem. Ref. Data, 2003, 32, 1, 1-441, https://doi.org/10.1063/1.1497629
. [all data]
Cederbaum, Domcke, et al., 1975
Cederbaum, L.S.; Domcke, W.; von Niessen, W.,
On the controversial assignment of the ionization potentials of formaldehyde,
Chem. Phys. Lett., 1975, 34, 1, 60, https://doi.org/10.1016/0009-2614(75)80200-4
. [all data]
Bombach, Dannacher, et al., 1981
Bombach, R.; Dannacher, J.; Stadelmann, J.-P.; Vogt, J.,
The fragmentation of formaldehyde molecular cations: The lifetime of CD2O+ (A2B1),
Chem. Phys. Lett., 1981, 77, 399. [all data]
Wiedmann, White, et al., 1994
Wiedmann, R.T.; White, M.G.; Wang, K.; McKoy, V.,
Rotationally resolved photoionization of polyatomic hydrides: CH3, H2O, H2S, H2CO,
J. Chem. Phys., 1994, 100, 7, 4738, https://doi.org/10.1063/1.466264
. [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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