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Ethylene

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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: T. Shimanouchi

Symmetry:   D2h     Symmetry Number sigma = 4


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

ag 1 CH2 s-str 3026  B  ia 3026.4 p gas
ag 2 CC str 1623  D  ia 1622.6 p gas FR(2«nu»10)
ag 3 CH2 scis 1342  B  ia 1342.2 p gas
au 4 CH2 twist 1023  E  ia  ia OC(«nu»4+«nu»6)
b1g 5 CH2 a-str 3103  B  ia 3102.5 dp gas
b1g 6 CH2 rock 1236  C  ia 1236 dp liq.
b1u 7 CH2 wag 949  A 949.3 M gas  ia
b2g 8 CH2 wag 943  C  ia 943 dp liq.
b2u 9 CH2 a-str 3106  B 3105.5 S gas  ia
b2u 10 CH2 rock 826  A 826.0 W gas  ia
b3u 11 CH2 s-str 2989  A 2988.66 S gas  ia
b3u 12 CH2 scis 1444  B 1443.5 S gas  ia

Source: Shimanouchi, 1972

Notes

SStrong
MMedium
WWeak
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.
A0~1 cm-1 uncertainty
B1~3 cm-1 uncertainty
C3~6 cm-1 uncertainty
D6~15 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

Go To: Top, Vibrational and/or electronic energy levels, References