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Benzene

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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: Takehiko Shimanouchi

Symmetry:   D6h     Symmetry Number sigma = 12


 Sym.   No   Approximate   Selected Freq.  Infrared   Raman   Comments 
 Species   type of mode   Value   Rating   Value  Phase  Value  Phase

a1g 1 CH str 3062  C  ia 3061.9 VS p liq.
a1g 2 Ring str 992  C  ia 991.6 VS p liq.
a2g 3 CH bend 1326  E  ia 1326 VW liq.
a2u 4 CH bend 673  B 673 S gas  ia
b1u 5 CH str 3068  C 3067.57 VW sln.  ia
b1u 6 Ring deform 1010  C 1010 W sln.  ia
b2g 7 CH bend 995  E  ia  ia OC(«nu»19+«nu»7,«nu»20+«nu»7)
b2g 8 Ring deform 703  E  ia  ia OC(«nu»19+«nu»8, «nu»20+«nu»8)
b2u 9 Ring str 1310  C 1310 W liq.  ia
b2u 10 CH bend 1150  C 1150 W liq.  ia
e1g 11 CH bend 849  C  ia 848.9 M dp liq.
e1u 12 CH str 3063  E 3080 S liq.  ia FR(«nu»13+«nu»16)
e1u 12 CH str 3063  E 3030 S liq.  ia FR(«nu»13+«nu»16)
e1u 13 Ring str + deform 1486  B 1486 S gas  ia
e1u 14 CH bend 1038  B 1038 S gas  ia
e2g 15 CH str 3047  C  ia 3046.8 S dp liq.
e2g 16 Ring str 1596  E  ia 1606.4 S dp liq. FR(«nu»2+«nu»18)
e2g 16 Ring str 1596  E  ia 1584.6 S dp liq. FR(«nu»2+«nu»18)
e2g 17 CH bend 1178  C  ia 1178.0 S dp liq.
e2g 18 Ring deform 606  C  ia 605.6 S dp liq.
e2u 19 CH bend 975  C 975 W liq.  ia
e2u 20 Ring deform 410  C 417.7 S sln.  ia
e2u 20 Ring deform 410  C 403.0 S sln.  ia

Source: Shimanouchi, 1972

Notes

VSVery strong
SStrong
MMedium
WWeak
VWVery weak
iaInactive
pPolarized
dpDepolarized
FRFermi resonance with an overtone or a combination tone indicated in the parentheses.
OCFrequency estimated from an overtone or a combination tone indicated in the parentheses.
B1~3 cm-1 uncertainty
C3~6 cm-1 uncertainty
E15~30 cm-1 uncertainty

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.

Shimanouchi, 1972
Shimanouchi, T., Tables of Molecular Vibrational Frequencies Consolidated Volume I, National Bureau of Standards, 1972, 1-160. [all data]


Notes

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