H(CC)2Br+

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:   D
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
To = 59700 ± 560 U gas Heilbronner, Hornung, et al., 1974

State:   C
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
To = 52525 ± 320 U gas Heilbronner, Hornung, et al., 1974

State:   B
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
To = 29130 ± 320 U gas Heilbronner, Hornung, et al., 1974

State:   A
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
To = 18401.9 ± 0.3 gas A-X 467 658 Klapstein, Maier, et al., 1982
Vib. 
sym. 		  No.   Approximate 
 type of mode 		  cm-1   Med.   Method   References
Σ+ 2 CC stretch 2138 ± 2 gas LF Klapstein, Maier, et al., 1982
3 CC stretch 2037 ± 2 gas LF Klapstein, Maier, et al., 1982
4 C-C stretch 918 ± 2 gas PE LF Maier, Marthaler, et al., 1980
Klapstein, Maier, et al., 1982
5 CBr stretch 409 ± 1 gas EF LF Maier, Marthaler, et al., 1980
Klapstein, Maier, et al., 1982
Π 7 Skel. deform. 478 ± 1 gas EF LF Klapstein, Maier, et al., 1982
8 Skel. deform. 348 ± 2 gas LF Klapstein, Maier, et al., 1982
9 Skel. deform. 111 ± 2 gas LF Klapstein, Maier, et al., 1982

State:   X

Vib. 
sym. 		  No.   Approximate 
 type of mode 		  cm-1   Med.   Method   References
Σ+ 1 CH stretch 3196 T gas EF Klapstein, Maier, et al., 1982
2 CC stretch 2155 ± 1 gas EF Maier, Marthaler, et al., 1980
Klapstein, Maier, et al., 1982
3 CC stretch 1914 ± 1 gas EF Maier, Marthaler, et al., 1980
Klapstein, Maier, et al., 1982
4 C-C stretch 1115 ± 1 gas EF Maier, Marthaler, et al., 1980
Klapstein, Maier, et al., 1982
5 CBr stretch 440 ± 1 gas EF Maier, Marthaler, et al., 1980
Klapstein, Maier, et al., 1982
Π 7 Skel. deform. 509 ± 1 gas EF Klapstein, Maier, et al., 1982
8 Skel. deform. 370 ± 1 gas EF Klapstein, Maier, et al., 1982
9 Skel. deform. 112 ± 1 gas EF Klapstein, Maier, et al., 1982

Additional references: Jacox, 1994, page 339

Notes

UUpper bound
TTentative assignment or approximate value
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.

Heilbronner, Hornung, et al., 1974
Heilbronner, E.; Hornung, V.; Maier, J.P.; Kloster-Jensen, E., The photoelectron spectra of halodiacetylenes, dihalodiacetylenes, and halomethyldiacetylenes, J. Am. Chem. Soc., 1974, 96, 4252. [all data]

Klapstein, Maier, et al., 1982
Klapstein, D.; Maier, J.P.; Misev, L.; Zambach, W., Emission and laser excitation spectra of rotationally cooled cations in the gas phase: Ã2Π ↔ X2Π band systems of 2X+, X «58875» Cl, Br, Chem. Phys., 1982, 72, 1-2, 101, https://doi.org/10.1016/0301-0104(82)87070-5 . [all data]

Maier, Marthaler, et al., 1980
Maier, J.P.; Marthaler, O.; Kloster-Jensen, E., Ã → X band systems of 2X+ (2Π → 2Π, and of CH3???C«58876»C???nX+ (2E → 2E) n = 1,2 with X = Cl, Br, J. Electron Spectrosc. Relat. Phenom., 1980, 18, 2, 251, https://doi.org/10.1016/0368-2048(80)80051-X . [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]

Notes

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