CH3CO

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 = 46500 gas 200 240 Adachi, Basco, et al., 1978
Parkes, 1981

State:   A
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
Tx = 18700 gas Hunziker
Rajakumar, Flad, et al., 2007

State:   ?
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
Td = 16700 Ar Jacox, 1982

State:   X

Vib. 
sym. 		  No.   Approximate 
 type of mode 		  cm-1   Med.   Method   References
CO stretch 1875 m H Ar IR Jacox, 1982
CO stretch 1842 m H Ar IR Shirk, Thesis, et al., 1968
Jacox, 1982
CH3 deform. 1420 w m H Ar IR Jacox, 1982
CH3 deform. 1329 w m H Ar IR Shirk, Thesis, et al., 1968
Jacox, 1982

Additional references: Jacox, 1994, page 317; Hirota, Mizoguchi, et al., 2007

Notes

wWeak
mMedium
H(1/2)(2ν)
xEnergy separation between the band maximum of the excited electronic state and the v = 0 level of the ground state.
dPhotodissociation threshold

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.

Adachi, Basco, et al., 1978
Adachi, H.; Basco, N.; James, D.G.L., The acetyl radical studied by flash photolysis and kinetic spectroscopy, Chem. Phys. Lett., 1978, 59, 3, 502, https://doi.org/10.1016/0009-2614(78)85028-3 . [all data]

Parkes, 1981
Parkes, D.A., The ultraviolet absorption spectra of the acetyl radical and the kinetics of the CH3 + CO reaction at room temperature, Chem. Phys. Lett., 1981, 77, 3, 527, https://doi.org/10.1016/0009-2614(81)85201-3 . [all data]

Hunziker
Hunziker, H.E., unpublished data.. [all data]

Rajakumar, Flad, et al., 2007
Rajakumar, B.; Flad, J.E.; Gierdzak, T.; Ravishankara, A.R.; Burkholder, J.B., Visible Absorption Spectrum of the CH, J. Phys. Chem. A, 2007, 111, 37, 8950, https://doi.org/10.1021/jp073339h . [all data]

Jacox, 1982
Jacox, M.E., The reaction of F atoms with acetaldehyde and ethylene oxide. Vibrational spectra of the CH3CO and CH2CHO free radicals trapped in solid argon, Chem. Phys., 1982, 69, 3, 407, https://doi.org/10.1016/0301-0104(82)88079-8 . [all data]

Shirk, Thesis, et al., 1968
Shirk, J.S.; Thesis, Ph.D.; of California, Univ.; Shirk, Berkeley(1966); J.S.; Pimentel, G.C., Potential functions and the bonding in the XCO free radicals, J. Am. Chem. Soc., 1968, 90, 13, 3349, https://doi.org/10.1021/ja01015a009 . [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]

Hirota, Mizoguchi, et al., 2007
Hirota, E.; Mizoguchi, A.; Ohshima, Y.; Katoh, K.; Sumiyoshi, Y.; Endo, Y., Interplay of methyl-group internal rotation and fine and hyperfine interaction in a free radical: Fourier transform microwave spectroscopy of the acetyl radical, Mol. Phys., 2007, 105, 5-7, 455, https://doi.org/10.1080/00268970601142624 . [all data]

Notes

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