1,2,3,4-C6H2F4+

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:   B
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
To = 23291.7 gas B-X 415 465 Allan, Maier, et al., 1977
Cossart-Magos, Cossart, et al., 1979
Bondybey and Miller, 1979
Tuckett, 1981
To = 23192 Ne B-X 387 480 Bondybey, English, et al., 1980
Vib. 
sym. 		  No.   Approximate 
 type of mode 		  cm-1   Med.   Method   References
a1 2 1539 Ne LF Bondybey, English, et al., 1980
4 1355 Ne LF Bondybey, English, et al., 1980
6 1172 Ne LF Bondybey, English, et al., 1980
7 1060 Ne LF Bondybey, English, et al., 1980
8 654 gas LF Bondybey and Miller, 1979
8 668 Ne LF Bondybey, English, et al., 1980
9 433 gas EM LF Cossart-Magos, Cossart, et al., 1979
Bondybey and Miller, 1979
Nibu, Fujii, et al., 1999
9 442 Ne LF Bondybey, English, et al., 1980
10 324 gas LF Tuckett, 1981
Nibu, Fujii, et al., 1999
10 324 Ne LF Bondybey, English, et al., 1980
11 271 gas EM LF Cossart-Magos, Cossart, et al., 1979
Bondybey and Miller, 1979
Nibu, Fujii, et al., 1999
11 277 Ne LF Bondybey, English, et al., 1980

State:   A
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
gas B-A 520 600 Allan, Maier, et al., 1977
To = 2767 T Ne Bondybey, Vaughn, et al., 1981

State:   X

Vib. 
sym. 		  No.   Approximate 
 type of mode 		  cm-1   Med.   Method   References
a1 2 1665 gas EM EF Cossart-Magos, Cossart, et al., 1979
Tuckett, 1981
2 1665 Ne LF Bondybey, English, et al., 1980
1228 gas EM Cossart-Magos, Cossart, et al., 1979
6 1198 Ne LF Bondybey, English, et al., 1980
7 1083 gas EF Tuckett, 1981
7 1082 Ne LF Bondybey, English, et al., 1980
8 678 gas EF Tuckett, 1981
8 680 Ne LF Bondybey, English, et al., 1980
593 gas EM Cossart-Magos, Cossart, et al., 1979
9 444 gas EM LF Cossart-Magos, Cossart, et al., 1979
Bondybey and Miller, 1979
Nibu, Fujii, et al., 1999
9 444 gas EF Tuckett, 1981
9 443 Ne LF Bondybey, English, et al., 1980
10 343 gas EF LF Tuckett, 1981
Nibu, Fujii, et al., 1999
10 340 Ne LF Bondybey, English, et al., 1980
11 271 gas EM LF Cossart-Magos, Cossart, et al., 1979
Bondybey and Miller, 1979
Nibu, Fujii, et al., 1999
11 271 gas EF Tuckett, 1981
11 273 Ne LF Bondybey, English, et al., 1980

Additional references: Jacox, 1994, page 435; Jacox, 2003, page 400; Dujardin, Leach, et al., 1980; Maier and Thommen, 1981; Bondybey, Vaughn, et al., 1981, 2

Notes

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

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.

Allan, Maier, et al., 1977
Allan, M.; Maier, J.P.; Marthaler, O., Radative relaxation of the B(π-1)EXCITED ELECTRONIC STATES OF THE RADICAL CATIONS OF REXAFLUOROBENZENE, PENTAFLUOROBENZENE, 1,2,3,4-, 1,2,3,5-, 1,2,4,5-TETRAFLUOROBENZENE, 1,3,5-, 1,2,4-TRIFLUOROBENZENE AND 1,3-DIFLUOROBENZENE, Chem. Phys., 1977, 26, 1, 131, https://doi.org/10.1016/0301-0104(77)87099-7 . [all data]

Cossart-Magos, Cossart, et al., 1979
Cossart-Magos, C.; Cossart, D.; Leach, S., Emission spectra of seven fluorobenzene cations, Mol. Phys., 1979, 37, 3, 793, https://doi.org/10.1080/00268977900103201 . [all data]

Bondybey and Miller, 1979
Bondybey, V.E.; Miller, T.A., Laser induced fluorescence from fluorobenzene radical cations in the gas phase, J. Chem. Phys., 1979, 70, 1, 138, https://doi.org/10.1063/1.437231 . [all data]

Tuckett, 1981
Tuckett, R.P., Fluorescence spectra of fluorobenzene cations excited in a supersonic molecular beam, Chem. Phys., 1981, 58, 2, 151, https://doi.org/10.1016/0301-0104(81)80052-3 . [all data]

Bondybey, English, et al., 1980
Bondybey, V.E.; English, J.H.; Miller, T.A., Laser-induced fluorescence spectra of several nonsymmetrical fluorobenzene radical cations in solid Ne, J. Mol. Spectrosc., 1980, 81, 2, 455, https://doi.org/10.1016/0022-2852(80)90205-2 . [all data]

Nibu, Fujii, et al., 1999
Nibu, Y.; Fujii, N.; Shimada, H., Electronic Spectra of Tetrafluorobenzene Cations Produced by Pulsed Glow Discharge in a Supersonic Free Jet., Bull. Chem. Soc. Japan, 1999, 72, 11, 2395, https://doi.org/10.1246/bcsj.72.2395 . [all data]

Bondybey, Vaughn, et al., 1981
Bondybey, V.E.; Vaughn, C.R.; Miller, T.A.; English, J.H.; Shiley, R.H., Halogenated benzene radical cations and ground state degeneracy splitting by asymmetric substitution, J. Chem. Phys., 1981, 74, 12, 6584, https://doi.org/10.1063/1.441120 . [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, 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]

Dujardin, Leach, et al., 1980
Dujardin, G.; Leach, S.; Taieb, G., Fluorescence quantum yields and lifetimes of nine fluorobenzene cations. Electronic state relaxation processes, Chem. Phys., 1980, 46, 3, 407, https://doi.org/10.1016/0301-0104(80)85217-7 . [all data]

Maier and Thommen, 1981
Maier, J.P.; Thommen, F., Fluorescence quantum yields and lifetimes of fluorobenzene cations in selected levels of their B and C states determined by photoelectron-photoion coincidence spectroscopy, Chem. Phys., 1981, 57, 319. [all data]

Bondybey, Vaughn, et al., 1981, 2
Bondybey, V.E.; Vaughn, C.; Miller, T.A.; English, J.H.; Shiley, R.H., Spectroscopy and decay dynamics of several methyl- and fluorine-substituted benzene radical cations, J. Am. Chem. Soc., 1981, 103, 21, 6303, https://doi.org/10.1021/ja00411a006 . [all data]

Notes

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