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C7 anion


Gas phase thermochemistry 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

Quantity Value Units Method Reference Comment
Deltafgas1015. ± 19.kJ/molR-EAArnold, Bradforth, et al., 1991Linear structure for both neutral and anion

Reaction thermochemistry 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

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

(C7- bullet 4294967295carbon) + carbon = C7-

By formula: (C7- bullet 4294967295C) + C = C7-

Quantity Value Units Method Reference Comment
Deltar478. ± 31.kJ/molN/AArnold, Bradforth, et al., 1991gas phase; Linear structure for both neutral and anion

Ion clustering 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

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.

Clustering reactions

(C7- bullet 4294967295carbon) + carbon = C7-

By formula: (C7- bullet 4294967295C) + C = C7-

Quantity Value Units Method Reference Comment
Deltar478. ± 31.kJ/molN/AArnold, Bradforth, et al., 1991gas phase; Linear structure for both neutral and anion

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 = 27090 ± 115 gas Yang, Taylor, et al., 1988
Arnold, Bradforth, et al., 1991

State:   C


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

To = 35231 ± 25 Ne C-X 278 284 Forney, Grutter, et al., 1997


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

Sigmag+ 3 491 ± 25 Ne AB Forney, Grutter, et al., 1997

State:   B


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

To = 20298 gas B-X 447 493 Ohara, Shiromaru, et al., 1997
Tulej, Kirkwood, et al., 1998
Tulej, Kirkwood, et al., 1998, 2
To = 20314 ± 8 Ne B-X 380 493 Forney, Grutter, et al., 1997


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

Sigmag+ 1 Sym. stretch 2038 gas MPD Ohara, Shiromaru, et al., 1997
Tulej, Kirkwood, et al., 1998
Tulej, Kirkwood, et al., 1998, 2
1 Sym. stretch 2058 ± 10 Ne AB Forney, Grutter, et al., 1997
2 1569 ± 9 Ne AB Forney, Grutter, et al., 1997
3 532 gas MPD Tulej, Kirkwood, et al., 1998
Tulej, Kirkwood, et al., 1998, 2
3 575 ± 8 Ne AB Forney, Grutter, et al., 1997

State:   A


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

To = 15930 gas A-X 496 627 Ohara, Shiromaru, et al., 1997
Tulej, Kirkwood, et al., 1998
Tulej, Kirkwood, et al., 1998, 2
Lakin, Pachkov, et al., 2000
To = 15954 ± 5 Ne A-X 495 627 Forney, Grutter, et al., 1997


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

Sigmag+ 1 Sym. stretch 1870 gas MPD Ohara, Shiromaru, et al., 1997
Tulej, Kirkwood, et al., 1998
Tulej, Kirkwood, et al., 1998, 2
Lakin, Pachkov, et al., 2000
1 Sym. stretch 1877 ± 6 Ne AB Forney, Grutter, et al., 1997
2 1452 gas MPD Tulej, Kirkwood, et al., 1998
Tulej, Kirkwood, et al., 1998, 2
Lakin, Pachkov, et al., 2000
2 1457 ± 5 Ne AB Forney, Grutter, et al., 1997
3 543 gas MPD Ohara, Shiromaru, et al., 1997
Tulej, Kirkwood, et al., 1998
Tulej, Kirkwood, et al., 1998, 2
Lakin, Pachkov, et al., 2000
3 562 ± 5 Ne AB Forney, Grutter, et al., 1997

State:   X


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

Sigmau+ 5 Asym. stretch 1736.4 Ne IR Freivogel, Grutter, et al., 1997
5 Asym. stretch 1734.8 Ar IR Szczepanski, Ekern, et al., 1997
Szczepanski, Hodyss, et al., 1998

Additional references: Jacox, 1994, page 370; Jacox, 1998, page 329; Jacox, 2003, page 344

Notes

oEnergy separation between the v = 0 levels of the excited and electronic ground states.
dPhotodissociation threshold

References

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Ion clustering 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., 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]

Forney, Grutter, et al., 1997
Forney, D.; Grutter, M.; Freivogel, P.; Maier, J.P., Electronic Absorption Spectra of Carbon Chain Anions (, J. Phys. Chem. A, 1997, 101, 29, 5292, https://doi.org/10.1021/jp970954k . [all data]

Ohara, Shiromaru, et al., 1997
Ohara, M.; Shiromaru, H.; Achiba, Y., Resonance-enhanced multiphoton electron detachment spectra of C[sub 7][sup -], C[sub 9][sup -], and C[sub 11][sup -], J. Chem. Phys., 1997, 106, 24, 9992, https://doi.org/10.1063/1.474074 . [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]

Tulej, Kirkwood, et al., 1998, 2
Tulej, M.; Kirkwood, D.A.; Pachkov, M.; Maier, J.P., Gas-Phase Electronic Transitions of Carbon Chain Anions Coinciding with Diffuse Interstellar Bands, Astrophys. J., 1998, 506, 1, L69, https://doi.org/10.1086/311637 . [all data]

Lakin, Pachkov, et al., 2000
Lakin, N.M.; Pachkov, M.; Tulej, M.; Maier, J.P.; Chambaud, G.; Rosmus, P., Theoretical and experimental study of the A[sup 2]«PI»[sub u]--X[sup 2]«PI»[sub g] band system of C[sub 7][sup -], J. Chem. Phys., 2000, 113, 21, 9586, https://doi.org/10.1063/1.1321768 . [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]

Szczepanski, Ekern, et al., 1997
Szczepanski, J.; Ekern, S.; Vala, M., Vibrational Spectroscopy of Small Matrix-Isolated Linear Carbon Cluster Anions, J. Phys. Chem. A, 1997, 101, 10, 1841, https://doi.org/10.1021/jp963200z . [all data]

Szczepanski, Hodyss, et al., 1998
Szczepanski, J.; Hodyss, R.; Vala, M., Isotopic Infrared Absorption Study of C, J. Phys. Chem. A, 1998, 102, 43, 8300, https://doi.org/10.1021/jp982963e . [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, Gas phase thermochemistry data, Reaction thermochemistry data, Ion clustering data, Vibrational and/or electronic energy levels, References