C7

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:   1Su+
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
To = 39556 ± 30 T Ne 1Su+-X 246 253 Forney, Freivogel, et al., 1996
To = 40470 Ar Szczepanski and Vala, 1991
Vib. 
sym. 		  No.   Approximate 
 type of mode 		  cm-1   Med.   Method   References
979 ± 30 Ne AB Forney, Freivogel, et al., 1996
428 ± 30 Ne AB Forney, Freivogel, et al., 1996

State:   B
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
To = 32765 ± 22 T Ne B-X 246 306 Forney, Freivogel, et al., 1996
To = 34360 T Ar Szczepanski and Vala, 1991
Vib. 
sym. 		  No.   Approximate 
 type of mode 		  cm-1   Med.   Method   References
1256 ± 25 Ne AB Forney, Freivogel, et al., 1996
695 ± 25 Ne AB Forney, Freivogel, et al., 1996

State:   1Πu
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
To = 18440 ± 7 Ne 1Πu-X 485 543 Forney, Freivogel, et al., 1996
Vib. 
sym. 		  No.   Approximate 
 type of mode 		  cm-1   Med.   Method   References
2170 ± 10 Ne AB Forney, Freivogel, et al., 1996
1873 ± 10 Ne AB Forney, Freivogel, et al., 1996
568 ± 10 Ne AB Forney, Freivogel, et al., 1996
478 ± 10 Ne AB Forney, Freivogel, et al., 1996

State:   a
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
Txx = 13800 ± 80 gas Kohno, Suzuki, et al., 1999

State:   X

Vib. 
sym. 		  No.   Approximate 
 type of mode 		  cm-1   Med.   Method   References
Σg+ 3 Sym. stretch 548 ± 90 gas PE Arnold, Bradforth, et al., 1991
3 Sym. stretch 582 T Ar IR Szczepanski, Ekern, et al., 1996
Σu+ 4 Asym. stretch 2138.315 gas DL Heath, Sheeks, et al., 1990
Heath and Saykally, 1991
Neubauer-Guenther, Giesen, et al., 2007
4 Asym. stretch 2134.6 Ne IR Smith, Agreiter, et al., 1994
Forney, Freivogel, et al., 1996
Tam, Macler, et al., 1997
Wu, Chen, et al., 2009
4 Asym. stretch 2127.8 Ar IR Kranze, Rittby, et al., 1996
4 Asym. stretch 2120.4 Kr IR Szczepanski, Ekern, et al., 1996
5 Asym. stretch 1898.378 gas DL QC Heath, Van Orden, et al., 1991
Krieg, Lutter, et al., 2010
5 Asym. stretch 1897.5 Ne IR Smith, Agreiter, et al., 1994
Forney, Freivogel, et al., 1996
Tam, Macler, et al., 1997
Wu, Chen, et al., 2009
5 Asym. stretch 1894.3 Ar IR Kranze, Rittby, et al., 1996
5 Asym. stretch 1889.3 Kr IR Szczepanski, Ekern, et al., 1996
6 1100.1 Ar IR Gonzalez, Rittby, et al., 2011
Πu 7 Bend 496 ± 110 gas PE Arnold, Bradforth, et al., 1991

Additional references: Jacox, 1994, page 369; Jacox, 1998, page 329; Jacox, 2003, page 343

Notes

TTentative assignment or approximate value
oEnergy separation between the v = 0 levels of the excited and electronic ground states.
xxEnergy separation between the band maxima of both the excited state and the ground state of a molecular cation, derived from a photoelectron spectrum.

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.

Forney, Freivogel, et al., 1996
Forney, D.; Freivogel, P.; Grutter, M.; Maier, J.P., Electronic absorption spectra of linear carbon chains in neon matrices. IV. C2n+1 n=2--7, J. Chem. Phys., 1996, 104, 13, 4954, https://doi.org/10.1063/1.471127 . [all data]

Szczepanski and Vala, 1991
Szczepanski, J.; Vala, M., Correlation of infrared and UV-visible bands of matrix-isolated carbon clusters, J. Phys. Chem., 1991, 95, 7, 2792, https://doi.org/10.1021/j100160a030 . [all data]

Kohno, Suzuki, et al., 1999
Kohno, M.; Suzuki, S.; Shiromaru, H.; Achiba, Y., Characterization of the lowest triplet states of linear form C[sub 2n+1] by anion photoelectron spectroscopy, J. Chem. Phys., 1999, 110, 8, 3781, https://doi.org/10.1063/1.478269 . [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]

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]

Heath, Sheeks, et al., 1990
Heath, J.R.; Sheeks, R.A.; Cooksy, A.L.; Saykally, R.J., The C7 cluster: structure and infrared frequencies, Science, 1990, 249, 4971, 895, https://doi.org/10.1126/science.11538081 . [all data]

Heath and Saykally, 1991
Heath, J.R.; Saykally, R.J., Infrared laser absorption spectroscopy of the ν4(σu) fundamental and associated ν11(πu) hot band of C7: Evidence for alternating rigidity in linear carbon clusters, J. Chem. Phys., 1991, 94, 3, 1724, https://doi.org/10.1063/1.459945 . [all data]

Neubauer-Guenther, Giesen, et al., 2007
Neubauer-Guenther, P.; Giesen, T.F.; Schlemmer, S.; Yamada, K.M.T., High resolution infrared spectra of the linear carbon cluster C[sub 7]: The ν[sub 4] stretching fundamental band and associated hot bands, J. Chem. Phys., 2007, 127, 1, 014313, https://doi.org/10.1063/1.2749520 . [all data]

Smith, Agreiter, et al., 1994
Smith, A.M.; Agreiter, J.; Hartle, M.; Engel, C.; Bondybey, V.E., Rare gas matrix studies of absorption and fluorescence of reactive intermediates formed in discharges through acetylene, Chem. Phys., 1994, 189, 2, 315, https://doi.org/10.1016/0301-0104(94)00299-1 . [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]

Wu, Chen, et al., 2009
Wu, Y.-J.; Chen, H.-F.; Camacho, C.; Sitek, H.A.; Hsu, S.-C.; Lin, M.-Y.; Chou, S.-L.; Ogilvie, J.F.; Cheng, B.-M., FORMATION AND IDENTIFICATION OF INTERSTELLAR MOLECULE LINEAR C, Astrophys. J., 2009, 701, 1, 8, https://doi.org/10.1088/0004-637X/701/1/8 . [all data]

Kranze, Rittby, et al., 1996
Kranze, R.H.; Rittby, C.M.L.; Graham, W.R.M., Fourier transform infrared and theoretical isotopic study of the ν4(σu) and ν5(σu) modes of linear C7, J. Chem. Phys., 1996, 105, 13, 5313, https://doi.org/10.1063/1.472400 . [all data]

Heath, Van Orden, et al., 1991
Heath, J.R.; Van Orden, A.; Kuo, E.; Saykally, R.J., The ν5 band of C7, Chem. Phys. Lett., 1991, 182, 1, 17, https://doi.org/10.1016/0009-2614(91)80096-G . [all data]

Krieg, Lutter, et al., 2010
Krieg, J.; Lutter, V.; Hardy, F.-X.; Schlemmer, S.; Giesen, T.F., The ν[sub 5] antisymmetric stretching mode of linear C[sub 7] revisited in high resolution, J. Chem. Phys., 2010, 132, 22, 224306, https://doi.org/10.1063/1.3431964 . [all data]

Gonzalez, Rittby, et al., 2011
Gonzalez, E.; Rittby, C.M.L.; Graham, W.R.M., Isotopic Study of New Fundamentals and Combination Bands of Linear C, J. Phys. Chem. A, 2011, 115, 12, 2533, https://doi.org/10.1021/jp111974d . [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

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