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H2CO+


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   «lambda»min 
 (nm) 
 «lambda»max 
 (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   «lambda»min 
 (nm) 
 «lambda»max 
 (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   «lambda»min 
 (nm) 
 «lambda»max 
 (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

TTentative assignment or approximate value
oEnergy 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 I«alpha» 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

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