p-C6H4

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:   a
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
To = 1330 ± 130 gas Wenthold, Squires, et al., 1998
Vib. 
sym. 		  No.   Approximate 
 type of mode 		  cm-1   Med.   Method   References
ag 4 995 ± 20 gas PE Wenthold, Squires, et al., 1998
5 610 ± 15 gas PE Wenthold, Squires, et al., 1998

State:   X

Vib. 
sym. 		  No.   Approximate 
 type of mode 		  cm-1   Med.   Method   References
ag 4 990 ± 20 gas PE Wenthold, Squires, et al., 1998
5 635 ± 20 gas PE Wenthold, Squires, et al., 1998
b1u 10 1403 w Ne IR Marquardt, Balster, et al., 1998
11 976 w Ne IR Marquardt, Balster, et al., 1998
11 980 s Ar IR Marquardt, Balster, et al., 1998
12 Ring deform. 918 w Ne IR Marquardt, Balster, et al., 1998
b2u 16 1331 w Ne IR Marquardt, Balster, et al., 1998
17 1207 w Ne IR Marquardt, Balster, et al., 1998
b3u 23 CH wag 721 s Ne IR Marquardt, Balster, et al., 1998
23 CH wag 725 s Ar IR Marquardt, Balster, et al., 1998
24 Ring torsion 435 w Ne IR Marquardt, Balster, et al., 1998

Additional references: Jacox, 2003, page 366

Notes

wWeak
sStrong
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.

Wenthold, Squires, et al., 1998
Wenthold, P.G.; Squires, R.R.; Lineberger, W.C., Ultraviolet Photoelectron Spectroscopy of the, J. Am. Chem. Soc., 1998, 120, 21, 5279, https://doi.org/10.1021/ja9803355 . [all data]

Marquardt, Balster, et al., 1998
Marquardt, R.; Balster, A.; Sander, W.; Kraka, E.; Cremer, D.; Radziszewski, J.G., 1,4-Didehydrobenzol, Angew. Chem., 1998, 110, 7, 1001, https://doi.org/10.1002/(SICI)1521-3757(19980403)110:7<1001::AID-ANGE1001>3.0.CO;2-D . [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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