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Poly(methylene)


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 CH2 s-str 2848  C  ia 2848 S sln.
ag 2 CH2 scis 1440  C  ia 1440 M sln.
ag 3 CC str 1131  C  ia 1131 M sln.
au 4 CH2 twist 1050  D 1050 ia VW sln.  ia «nu»1063 cm(«nu»1 )is given to this mode
b1g 5 CH2 wag 1370  D  ia 1370 VW sln.
b1g 6 CC str 1061  C  ia 1061 M sln.
b1u 7 CH2 a-str 2919  C 2919 S sln.  ia
b1u 8 CH2 rock 725  C 731 S sln.  ia Doublet due to the crystal field effect
b1u 8 CH2 rock 725  C 720 S sln.  ia Doublet due to the crystal field effect
b2g 9 CH2 twist 1295  C  ia 1295 M sln.
b2u 10 CH2 s-str 2851  C 2851 S sln.  ia
b2u 11 CH2 scis 1468  C 1473 S sln.  ia Doublet due to the crystal field effect
b2u 11 CH2 scis 1468  C 1463 S sln.  ia Doublet due to the crystal field effect
b3g 12 CH2 a-str 2883  C  ia 2883 S sln.
b3g 13 CH2 rock 1168  C  ia 1168 W sln.
b3u 14 CH2 wag 1176  C 1176 VW sln.  ia

Source: Shimanouchi, 1972

Notes

SStrong
MMedium
WWeak
VWVery weak
iaInactive
C3~6 cm-1 uncertainty
D6~15 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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