[2H4]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: Takehiko 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 CD2 s-str 2251  C  ia 2251 VS liq.
ag 2 CC str 1515  C  ia 1515 VS liq.
ag 3 CD2 scis 981  C  ia 981 M liq.
au 4 CD2 twist 728  E  ia  ia CF
b1g 5 CD2 a-str 2304  C  ia 2304 W liq.
b1g 6 CD2 rock 1009  E  ia OC(«nu»6+«nu»10)
b1u 7 CD2 wag 720  B 720.0 VS gas  ia
b2g 8 CD2 wag 780  C  ia 780 W liq.
b2u 9 CD a-str 2345  C 2345 S gas  ia
b2u 10 CD2 rock 586  E  ia CF. From product rule.
b3u 11 CD2 a-str 2200  C 2200.2 S gas  ia
b3u 12 CD2 scis 1078  C 1077.9 S gas  ia

Source: Shimanouchi, 1972

Notes

VSVery strong
SStrong
MMedium
WWeak
iaInactive
OCFrequency estimated from an overtone or a combination tone indicated in the parentheses.
CFCalculated frequency
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

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