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Acetylene

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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:   Dinftyh     Symmetry Number sigma = 2


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

«sigma»g+ 1 CH str 3374  C  ia 3373.7 S gas
«sigma»g+ 2 CC str 1974  C  ia 1973.8 VS gas
«sigma»u+ 3 CH str 3289  B 3294.9 S gas  ia FR(«nu»2+«nu»4+«nu»5)
«sigma»u+ 3 CH str 3289  B 3281.9 VS gas  ia FR(«nu»2+«nu»4+«nu»5)
«pi»g 4 CH bend 612  C  ia 611.8 VW gas
«pi»u 5 CH bend 730  A 730.3 VS gas  ia

Source: Shimanouchi, 1972

Notes

VSVery strong
SStrong
VWVery weak
iaInactive
FRFermi resonance with 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

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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