C12-

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:   (2) 2Πu
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
To = 11636 ± 5 Ne 642 860 Freivogel, Fulara, et al., 1995
Freivogel, Grutter, et al., 1997
Vib. 
sym. 		  No.   Approximate 
 type of mode 		  cm-1   Med.   Method   References
Σg+ 1 2014 ± 6 Ne AB Freivogel, Grutter, et al., 1997
2 1923 ± 6 Ne AB Freivogel, Fulara, et al., 1995
Freivogel, Grutter, et al., 1997
4 1463 ± 5 Ne AB Freivogel, Grutter, et al., 1997
6 320 ± 4 Ne AB Freivogel, Fulara, et al., 1995
Freivogel, Grutter, et al., 1997

State:   C
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
To = 8100 ± 100 gas C-X 1100 1240 Ohara, Kasuya, et al., 2000
To = 8006 ± 5 Ne C-X 1200 1250 Freivogel, Fulara, et al., 1995
To = 7906 ± 10 Ar Szczepanski, Fuller, et al., 2001
Vib. 
sym. 		  No.   Approximate 
 type of mode 		  cm-1   Med.   Method   References
Σg+ 6 323 ± 5 Ne AB Freivogel, Fulara, et al., 1995

State:   X

Vib. 
sym. 		  No.   Approximate 
 type of mode 		  cm-1   Med.   Method   References
Σu+ 2012.6 Ne IR Freivogel, Grutter, et al., 1997, 2
1819.3 Ne IR Freivogel, Grutter, et al., 1997, 2

Additional references: Jacox, 1998, page 355; Jacox, 2003, page 380

Notes

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.

Freivogel, Fulara, et al., 1995
Freivogel, P.; Fulara, J.; Jakobi, M.; Forney, D.; Maier, J.P., Electronic absorption spectra of linear carbon chains in neon matrices. II. C-2n, C2n, and C2nH, J. Chem. Phys., 1995, 103, 1, 54, https://doi.org/10.1063/1.469621 . [all data]

Freivogel, Grutter, et al., 1997
Freivogel, P.; Grutter, M.; Forney, D.; Maier, J.P., Electronic absorption spectra of carbon chain anions C[sub 2n][sup -] (n=4--7) in neon matrices, J. Chem. Phys., 1997, 107, 12, 4468, https://doi.org/10.1063/1.475314 . [all data]

Ohara, Kasuya, et al., 2000
Ohara, M.; Kasuya, D.; Shiromaru, H.; Achiba, Y., Resonance-Enhanced Multiphoton Electron Detachment (REMPED) Study of Carbon Anions up to C, J. Phys. Chem. A, 2000, 104, 38, 8622, https://doi.org/10.1021/jp0010637 . [all data]

Szczepanski, Fuller, et al., 2001
Szczepanski, J.; Fuller, J.; Ekern, S.; Vala, M., Electronic absorption and resonance Raman spectra of large linear carbon clusters isolated in solid argon, Spectrochim. Acta A, 2001, 57, 4, 775, https://doi.org/10.1016/S1386-1425(00)00443-1 . [all data]

Freivogel, Grutter, et al., 1997, 2
Freivogel, P.; Grutter, M.; Forney, D.; Maier, J.P., Infrared bands of mass-selected carbon chains Cn (n = 8-12) and Cn- (n = 5-10, 12) in neon matrices, Chem. Phys., 1997, 216, 3, 401, https://doi.org/10.1016/S0301-0104(97)00038-4 . [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]

Notes

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