C8

Gas phase ion energetics data

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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: John E. Bartmess

View reactions leading to C8+ (ion structure unspecified)

Electron affinity determinations

EA (eV) Method Reference Comment
4.3790 ± 0.0060LPESArnold, Bradforth, et al., 1991Linear structure for both neutral and anion
4.42 ± 0.10LPESYang, Taylor, et al., 1989EA given is Vertical Detachment Energy. probably linear structure.

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 3Su-
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
Tx = 38600 gas Boguslavskiy and Maier, 2006
To = 36071 ± 26 Ne Grutter, Wyss, et al., 1999

State:   ?
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
To = 32934 ± 22 Ne 285 304 Grutter, Wyss, et al., 1999
Vib. 
sym. 		  No.   Approximate 
 type of mode 		  cm-1   Med.   Method   References
Σg+ 3 1639 ± 34 Ne AB Grutter, Wyss, et al., 1999
4 473 ± 32 Ne AB Grutter, Wyss, et al., 1999

State:   3Su-
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
To = 15630 ± 5 Ne 3Su--X 550 640 Freivogel, Fulara, et al., 1995
Vib. 
sym. 		  No.   Approximate 
 type of mode 		  cm-1   Med.   Method   References
Σg+ 1 2075 ± 5 Ne AB Freivogel, Fulara, et al., 1995
4 471 ± 5 Ne AB Freivogel, Fulara, et al., 1995

State:   3Πg
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
To = 8310 ± 160 gas Xu, Burton, et al., 1997

State:   3Su+
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
To = 6290 ± 160 gas Xu, Burton, et al., 1997

State:   1Sg+
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
To = 930 ± 120 gas Xu, Burton, et al., 1997

State:   1Dg
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
To = 570 ± 120 gas Xu, Burton, et al., 1997
Vib. 
sym. 		  No.   Approximate 
 type of mode 		  cm-1   Med.   Method   References
Σg+ 1 Sym. stretch 1903 ± 50 gas PE Xu, Burton, et al., 1997
3 Sym. stretch 1355 ± 50 gas PE Xu, Burton, et al., 1997

State:   X

Vib. 
sym. 		  No.   Approximate 
 type of mode 		  cm-1   Med.   Method   References
Σg+ 1 Sym. stretch 1928 ± 50 gas PE Xu, Burton, et al., 1997
3 Sym. stretch 1361 ± 50 gas PE Xu, Burton, et al., 1997
4 Sym. stretch 565 T gas PE Arnold, Bradforth, et al., 1991
Σu- 5 2067.98 gas DL Neubauer-Guenther, Giesen, et al., 2003
5 2067.8 Ne IR Freivogel, Fulara, et al., 1995
Freivogel, Grutter, et al., 1997
Tam, Macler, et al., 1997
5 2063.9 Ar IR Forney, Grutter, et al., 1996
5 2065.3 T Kr IR Szczepanski, Ekern, et al., 1996
6 1707.8 Ne IR Forney, Grutter, et al., 1996
Szczepanski, Ekern, et al., 1996
Freivogel, Grutter, et al., 1997
6 1705.6 Ar IR Forney, Grutter, et al., 1996
6 1706.0 T Kr IR Szczepanski, Ekern, et al., 1996

Additional references: Jacox, 1994, page 381; Jacox, 1998, page 340; Jacox, 2003, page 360; Van Zee, Ferrante, et al., 1988

Notes

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

References

Go To: Top, Gas phase ion energetics data, 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.

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]

Yang, Taylor, et al., 1989
Yang, S.; Taylor, K.J.; Craycraft, M.J.; Conceicao, J.; Pettiette, C.L.; Cherhnovsky, O.; Smalley, R.E., UPS of 2-30 Atom Carbon Clusters: Chains and Rings, Chem. Phys. Lett., 1989, 144, 5-6, 431, https://doi.org/10.1016/0009-2614(88)87291-9 . [all data]

Boguslavskiy and Maier, 2006
Boguslavskiy, A.; Maier, J.P., Gas phase electronic spectra of the carbon chains C[sub 5], C[sub 6], C[sub 8], and C[sub 9], J. Chem. Phys., 2006, 125, 9, 094308, https://doi.org/10.1063/1.2276848 . [all data]

Grutter, Wyss, et al., 1999
Grutter, M.; Wyss, M.; Riaplov, E.; Maier, J.P.; Peyerimhoff, S.D.; Hanrath, M., Electronic absorption spectra of linear C[sub 6], C[sub 8] and cyclic C[sub 10], C[sub 12] in neon matrices, J. Chem. Phys., 1999, 111, 16, 7397, https://doi.org/10.1063/1.480062 . [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]

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]

Neubauer-Guenther, Giesen, et al., 2003
Neubauer-Guenther, P.; Giesen, T.F.; Berndt, U.; Fuchs, G.; Winnewisser, G., The Cologne Carbon Cluster Experiment: ro-vibrational spectroscopy on C8 and other small carbon clusters, Spectrochim. Acta A59, 2003, 59, 3, 431, https://doi.org/10.1016/S1386-1425(02)00380-3 . [all data]

Freivogel, Grutter, et al., 1997
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]

Tam, Macler, et al., 1997
Tam, S.; Macler, M.; Fajardo, M.E., Matrix isolation spectroscopy of laser ablated carbon species in Ne, D[sub 2], and H[sub 2] matrices, J. Chem. Phys., 1997, 106, 22, 8955, https://doi.org/10.1063/1.474028 . [all data]

Forney, Grutter, et al., 1996
Forney, D.; Grutter, M.; Freivogel, P.; Maier, J.P., Proc. 10th Int. Symp. Atomic, 1996, Molecular, Cluster, Ion, and Surf. Physics,. [all data]

Szczepanski, Ekern, et al., 1996
Szczepanski, J.; Ekern, S.; Chapo, C.; Vala, M., Infrared spectroscopy of matrix-isolated carbon clusters, with emphasis on C8 and C9, Chem. Phys., 1996, 211, 1-3, 359, https://doi.org/10.1016/0301-0104(96)00212-1 . [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]

Van Zee, Ferrante, et al., 1988
Van Zee, R.J.; Ferrante, R.F.; Zeringue, K.J.; Weltner, W., Jr., Electron spin resonance of the C6, C8, and C10 molecules, J. Chem. Phys., 1988, 88, 6, 3465, https://doi.org/10.1063/1.453895 . [all data]

Notes

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