1,2,4,5-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 = 24443.5 gas B-X 385 500 Allan, Maier, et al., 1977
Cossart-Magos, Cossart, et al., 1979
Bondybey and Miller, 1979
Tuckett, 1981
To = 24352 Ne B-X 385 510 Bondybey, English, et al., 1980
To = 24072 Ar Bondybey, Miller, et al., 1979
Vib. 
sym. 		  No.   Approximate 
 type of mode 		  cm-1   Med.   Method   References
ag 2 1536 Ne LF Bondybey, English, et al., 1980
2 1536 Ar LF Bondybey, Miller, et al., 1979
3 1392 Ar LF Bondybey, Miller, et al., 1979
4 725 Ne LF Bondybey, English, et al., 1980
4 722 Ar LF Bondybey, Miller, et al., 1979
5 460 gas LF Bondybey and Miller, 1979
Nibu, Fujii, et al., 1999
5 465 Ne LF Bondybey, English, et al., 1980
5 470 Ar LF Bondybey, Miller, et al., 1979
6 274 gas LF Bondybey and Miller, 1979
Nibu, Fujii, et al., 1999
6 276 Ne LF Bondybey, English, et al., 1980
6 279 Ar LF Bondybey, Miller, et al., 1979

State:   A
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
gas B-A 550 650 Allan, Maier, et al., 1977
To = 6115 Ne B-A 545 625 Bondybey, Vaughn, et al., 1981

State:   X

Vib. 
sym. 		  No.   Approximate 
 type of mode 		  cm-1   Med.   Method   References
ag 2 1558 gas EF LF Tuckett, 1981
Nibu, Fujii, et al., 1999
2 1558 Ne LF Bondybey, English, et al., 1980
3 1477 gas EF Tuckett, 1981
3 1476 Ne LF Bondybey, English, et al., 1980
4 726 Ne LF Bondybey, English, et al., 1980
5 482 gas EM EF Cossart-Magos, Cossart, et al., 1979
Tuckett, 1981
5 482 gas PI LF Takazawa, Fujii, et al., 1992
Nibu, Fujii, et al., 1999
5 485 Ne LF Bondybey, English, et al., 1980
5 480 Ar LF Bondybey, Miller, et al., 1979
6 287 gas EF LF Tuckett, 1981
Nibu, Fujii, et al., 1999
6 287 Ne LF Bondybey, English, et al., 1980
6 289 Ar LF Bondybey, Miller, et al., 1979
b1u 183 H gas PI Takazawa, Fujii, et al., 1992

Additional references: Jacox, 1994, page 437; Jacox, 2003, page 401; Dujardin, Leach, et al., 1980; Maier and Thommen, 1981; Bondybey, Vaughn, et al., 1981, 2

Notes

H(1/2)(2ν)
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]

Bondybey, Miller, et al., 1979
Bondybey, V.E.; Miller, T.A.; English, J.H., Matrix laser fluorescence spectra of several fluorobenzene radical cations, J. Am. Chem. Soc., 1979, 101, 5, 1248, https://doi.org/10.1021/ja00499a033 . [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]

Takazawa, Fujii, et al., 1992
Takazawa, K.; Fujii, M.; Ebata, T.; Ito, M., Pulsed-field-ionization spectroscopy for the study of molecular cations, Chem. Phys. Lett., 1992, 189, 6, 592, https://doi.org/10.1016/0009-2614(92)85256-A . [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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