(HCO)2+

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:   E
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
To = 51000 ± 700 gas Turner, Baker, et al.
Vib. 
sym. 		  No.   Approximate 
 type of mode 		  cm-1   Med.   Method   References
ag 1410 ± 80 gas PE Turner, Baker, et al.
990 ± 80 gas PE Turner, Baker, et al.

State:   C,D
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
Tx = 44200 T gas Turner, Baker, et al.

State:   B
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
To = 26870 ± 700 gas Turner, Baker, et al.
Vib. 
sym. 		  No.   Approximate 
 type of mode 		  cm-1   Med.   Method   References
ag 2 CO stretch 1360 ± 80 gas PE Turner, Baker, et al.

State:   A
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
To = 13470 ± 700 gas Turner, Baker, et al.
Cowan, Gleiter, et al., 1971
Arnett, Newkome, et al., 1974
Vib. 
sym. 		  No.   Approximate 
 type of mode 		  cm-1   Med.   Method   References
ag 2 CO stretch 1610 ± 80 gas PE Turner, Baker, et al.
4 CC stretch 970 ± 80 gas PE Turner, Baker, et al.
5 Skel. deform. 400 ± 80 gas PE Turner, Baker, et al.

Additional references: Jacox, 1994, page 329

Notes

TTentative assignment or approximate value
oEnergy separation between the v = 0 levels of the excited and electronic ground states.
xEnergy separation between the band maximum of the excited electronic state and the v = 0 level of the ground state.

References

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Turner, Baker, et al.
Turner, D.W.; Baker, C.; Baker, A.D.; Brundle, C.R., Molecular Photoelectron Spectroscopy, pp. 252-261. Wiley-Interscience, London, 1970.. [all data]

Cowan, Gleiter, et al., 1971
Cowan, D.O.; Gleiter, R.; Hashmall, J.A.; Heilbronner, E.; Hornung, V., Wechselwirkung zwischen den Orbitalen ,,einsamer" Elektronenpaare in Dicarbonylen, Angew. Chem., 1971, 83, 11, 405, https://doi.org/10.1002/ange.19710831111 . [all data]

Arnett, Newkome, et al., 1974
Arnett, J.F.; Newkome, G.; Mattice, W.L.; McGlynn, S.P., Excited electronic states of the α-dicarbonyls, J. Am. Chem. Soc., 1974, 96, 4385. [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

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