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C4-


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   «lambda»min 
 (nm) 
 «lambda»max 
 (nm) 
 References

Td = 31320 ± 80 gas Yang, Taylor, et al., 1988
Arnold, Bradforth, et al., 1991
Xu, Burton, et al., 1997

State:   (3) 2Piu


 Energy 
 (cm-1
 Med.   Transition   «lambda»min 
 (nm) 
 «lambda»max 
 (nm) 
 References

To = 28717 gas (3) 2«PI»u-X 336 348 Tulej, Kirkwood, et al., 1998
To = 28868 Ne 335 347 Freivogel, Grutter, et al., 1997

State:   (2) 2Piu


 Energy 
 (cm-1
 Med.   Transition   «lambda»min 
 (nm) 
 «lambda»max 
 (nm) 
 References

To = 25989 gas (2) 2«PI»u-X 372 384 Tulej, Kirkwood, et al., 1998
To = 26069 ± 14 Ne 372 384 Freivogel, Grutter, et al., 1997


Vib. 
sym. 
 No.   Approximate 
 type of mode 
 cm-1   Med.   Method   References

Sigmag+ 1 2056 gas MPD Tulej, Kirkwood, et al., 1998
2 710 gas MPD Tulej, Kirkwood, et al., 1998
2 755 ± 20 Ne AB Freivogel, Grutter, et al., 1997
Pig 4 374 H gas MPD Tulej, Kirkwood, et al., 1998
4 349 ± 10 H Ne AB Freivogel, Grutter, et al., 1997
Piu 5 268 H gas MPD Tulej, Kirkwood, et al., 1998
5 271 ± 10 H Ne AB Freivogel, Grutter, et al., 1997

State:   C


 Energy 
 (cm-1
 Med.   Transition   «lambda»min 
 (nm) 
 «lambda»max 
 (nm) 
 References

To = 21871.53 gas C-X 379 460 Zhao, de Beer, et al., 1996
Tulej, Kirkwood, et al., 1998
To = 21896 ± 5 Ne C-X 410 527 Freivogel, Fulara, et al., 1995
Schafer, Grutter, et al., 1996
To = 21720 Ar C-X 416 461 Grutter, Freivogel, et al., 1997


Vib. 
sym. 
 No.   Approximate 
 type of mode 
 cm-1   Med.   Method   References

Sigmag+ 1 1729 H gas MPD Tulej, Kirkwood, et al., 1998
1 1801 Ne AB Fulara, Freivogel, et al., 2007
2 752.4 gas PD Zhao, de Beer, et al., 1996
2 759 ± 5 Ne AB Freivogel, Fulara, et al., 1995
2 763 Ar AB Grutter, Freivogel, et al., 1997
Piu 5 Deformation 223 H gas PD Zhao, de Beer, et al., 1996
5 Deformation 242 H Ne AB Fulara, Freivogel, et al., 2007

State:   B


 Energy 
 (cm-1
 Med.   Transition   «lambda»min 
 (nm) 
 «lambda»max 
 (nm) 
 References

To = 10789 ± 2 Ne B-X 672 927 Freivogel, Grutter, et al., 1997


Vib. 
sym. 
 No.   Approximate 
 type of mode 
 cm-1   Med.   Method   References

Sigmag+ 1 2056 ± 5 Ne AB Freivogel, Grutter, et al., 1997
2 930 ± 4 Ne AB Freivogel, Grutter, et al., 1997
Piu 5 259 ± 2 H Ne AB Freivogel, Grutter, et al., 1997

State:   A


 Energy 
 (cm-1
 Med.   Transition   «lambda»min 
 (nm) 
 «lambda»max 
 (nm) 
 References

Ne A-X 907 1206 Freivogel, Grutter, et al., 1997


Vib. 
sym. 
 No.   Approximate 
 type of mode 
 cm-1   Med.   Method   References

Sigmag+ 2 817 ± 3 Ne AB Freivogel, Grutter, et al., 1997
Piu 5 275 ± 2 Ne AB Freivogel, Grutter, et al., 1997

State:   X


Vib. 
sym. 
 No.   Approximate 
 type of mode 
 cm-1   Med.   Method   References

Sigmag+ 1 2047 ± 20 Ne LF Schafer, Grutter, et al., 1996
2 936 ± 20 Ne LF Schafer, Grutter, et al., 1996
Sigmau+ 3 Asym. stretch 1699.8 Ar IR Szczepanski, Vala, et al., 1997
Pig 4 Deformation 396 ± 20 H Ne LF Schafer, Grutter, et al., 1996

Additional references: Jacox, 1994, page 183; Jacox, 1998, page 246; Jacox, 2003, page 217

Notes

H(1/2)(2nu)
oEnergy separation between the v = 0 levels of the excited and electronic ground states.
dPhotodissociation threshold

References

Go To: Top, Vibrational and/or electronic energy levels, Notes

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

Yang, Taylor, et al., 1988
Yang, S.; Taylor, K.J.; Craycraft, M.J.; Conceicao, J.; Pettiette, C.L.; Cheshnovsky, O.; Smalley, R.E., UPS of 2--30-atom carbon clusters: Chains and rings, Chem. Phys. Lett., 1988, 144, 5-6, 431, https://doi.org/10.1016/0009-2614(88)87291-9 . [all data]

Arnold, Bradforth, et al., 1991
Arnold, D.W.; Bradforth, S.E.; Kitsopoulos, T.N.; Neumark, D.M., Vibrationally Resolved Spectra of C2-C11 by Anion Photoelectron Spectroscopy, J. Chem. Phys., 1991, 95, 12, 8753, https://doi.org/10.1063/1.461211 . [all data]

Xu, Burton, et al., 1997
Xu, C.; Burton, G.R.; Taylor, T.R.; Neumark, D.M., Photoelectron spectroscopy of C[sub 4][sup -], C[sub 6][sup -], and C[sub 8][sup -], J. Chem. Phys., 1997, 107, 9, 3428, https://doi.org/10.1063/1.474715 . [all data]

Tulej, Kirkwood, et al., 1998
Tulej, M.; Kirkwood, D.A.; Maccaferri, G.; Dopfer, O.; Maier, J.P., Electronic spectra of linear carbon anions, Chem. Phys., 1998, 228, 1-3, 293, https://doi.org/10.1016/S0301-0104(97)00358-3 . [all data]

Freivogel, Grutter, et al., 1997
Freivogel, P.; Grutter, M.; Forney, D.; Maier, J.P., Electronic absorption spectra of C[sub 4][sup -] and C[sub 6][sup -] chains in neon matrices, J. Chem. Phys., 1997, 107, 1, 22, https://doi.org/10.1063/1.474369 . [all data]

Zhao, de Beer, et al., 1996
Zhao, Y.; de Beer, E.; Neumark, D.M., Rotationally resolved spectrum of the C 2«PI»u<--X 2«PI»g electronic transition of C-4 via resonant two-photon detachment spectroscopy, J. Chem. Phys., 1996, 105, 7, 2575, https://doi.org/10.1063/1.472123 . [all data]

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]

Schafer, Grutter, et al., 1996
Schafer, M.; Grutter, M.; Fulara, J.; Forney, D.; Freivogel, P.; Maier, J.P., Emission spectrum of mass-selected C4-:C2«PI»u --> X2«PI»g in a neon matrix, Chem. Phys. Lett., 1996, 260, 3-4, 406, https://doi.org/10.1016/0009-2614(96)00882-2 . [all data]

Grutter, Freivogel, et al., 1997
Grutter, M.; Freivogel, P.; Forney, D.; Maier, J.P., Diffusion of mass-selected carbon atoms and molecules in argon and neon matrices, J. Chem. Phys., 1997, 107, 14, 5356, https://doi.org/10.1063/1.474245 . [all data]

Fulara, Freivogel, et al., 2007
Fulara, J.; Freivogel, P.; Maier, J.P., Electronic Transitions of CsC, J. Phys. Chem. A, 2007, 111, 31, 7551, https://doi.org/10.1021/jp070356y . [all data]

Szczepanski, Vala, et al., 1997
Szczepanski, J.; Vala, M.; Shen, L.N.; Withey, P.A.; Graham, W.R., Infrared Spectroscopy of the C, J. Phys. Chem. A, 1997, 101, 47, 8788, https://doi.org/10.1021/jp971884k . [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, 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

Go To: Top, Vibrational and/or electronic energy levels, References