Dimethyl ether

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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:   C     Symmetry Number σ = 2


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

a1 1 CH3 d-str 2996  B 2996 S gas 2989 S liq.
a1 2 CH3 s-str 2817  B 2817 S gas 2815 VS p liq.
a1 3 CH3 d-deform 1464  D 1464 M gas
a1 4 CH3 s-deform 1452  D 1452 M gas 1452 S dp liq.
a1 5 CH3 rock 1244  B 1244 W gas
a1 6 CO s-str 928  B 928 S gas 922 S p liq.
a1 7 COC deform 418  C 418 M gas 428 M p liq.
a2 8 CH3 d-str 2952  C  ia 2952 S liq.
a2 9 CH3 d-deform 1464  D  ia SF3)
a2 10 CH3 rock 1150  C  ia 1150 M d liq.
a2 11 Torsion 203  E  ia CF
b1 12 CH3 d-str 2996  B 2996 S gas 2989 S liq. OV1)
b1 13 CH3 s-str 2817  B 2817 S gas 2815 VS p liq. OV2)
b1 14 CH3 d-deform 1464  D 1464 M gas OV3)
b1 15 CH3 s-deform 1452  D 1452 M gas 1452 S dp liq. OV4)
b1 16 CH3 rock 1227  C 1227 W liq.
b1 17 CO a-str 1102  B 1102 VS gas 1104 M dp liq.
b2 18 CH3 d-str 2925  B 2925 S gas
b2 19 CH3 d-deform 1464  D 1464 M gas OV3)
b2 20 CH3 rock 1179  B 1179 VS gas 1170 sh liq.
b2 21 Torsion 242  C 242 W gas

Source: Shimanouchi, 1972

Notes

dPhotodissociation threshold
VSVery strong
SStrong
MMedium
WWeak
iaInactive
shShoulder
pPolarized
dpDepolarized
CFCalculated frequency
SFCalculation shows that the frequency approximately equals that of the vibration indicated in the parentheses.
OVOverlapped by band indicated in parentheses.
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

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