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Cyclobutane

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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:   D2d     Symmetry Number sigma = 4


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

a1 1 CH2 s-str 2895  D  ia 2916 p liq. FR(2«nu»2,2«nu»13)
a1 1 CH2 s-str 2895  D  ia 2866 p liq. FR(2«nu»2,2«nu»13)
a1 2 CH2 scis 1443  C  ia 1443 p liq. SF(«nu»13)
a1 3 Ring str 1001  C  ia 1001 p liq. SF(«nu»14)
a1 4 CH2 a-str 2975  E  ia CF
a1 5 CH2 rock 741  C  ia 741 dp liq.
a1 6 Ring puck 197  C  ia 197 liq. CF
a2 7 CH2 wag 1260  E  ia  ia CF
a2 8 CH2 twist 1257  E  ia  ia CF
b1 9 CH2 wag 1219  C  ia 1219 dp liq.
b1 10 Ring deform 926  C  ia 926 dp liq.
b1 11 CH2 twist 1222  E  ia CF
b2 12 CH2 s-str 2893  E CF
b2 13 CH2 scis 1443  C 1443 dp liq. SF(«nu»2)
b2 14 Ring deform 1001  D 1001 p liq. SF(«nu»3)
b2 15 CH2 a-str 2987  C 2987 S gas
b2 16 CH2 rock 627  C 627 S gas
e 17 CH2 a-str 2952  C 2952 liq.
e 18 CH2 twist 1223  C 1223 W gas
e 19 CH2 rock 749  C 749 W gas
e 20 CH2 s-str 2887  D 2897 S gas
e 20 CH2 s-str 2887  D 2878 S gas
e 21 CH2 scis 1447  C 1447 S gas
e 22 CH2 wag 1257  C 1257 S gas
e 23 Ring deform 898  C 898 S gas

Source: Shimanouchi, 1972

Notes

SStrong
WWeak
iaInactive
pPolarized
dpDepolarized
FRFermi resonance with an overtone or a combination tone indicated in the parentheses.
CFCalculated frequency
SFCalculation shows that the frequency approximately equals that of the vibration indicated in the parentheses.
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