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Ethane, 1,2-dibromo-

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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

Trans form     Symmetry:   C2h     Symmetry Number sigma = 2


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

ag 1 CH2 s-str 2972  D  ia 2972 p liq.
ag 2 CH2 scis 1440  C  ia 1440 dp liq.
ag 3 CH2 wag 1255  C  ia 1255 p liq. SF(«nu»12)
ag 4 CC str 1053  C  ia 1053 dp liq.
ag 5 CBr str 660  C  ia 660 p liq.
ag 6 CCBr deform 190  C  ia 190 p liq.
au 7 CH2 a-str 3037  D 3037 S liq.  ia
au 8 CH2 twist 1087  C 1087 M liq.  ia
au 9 CH2 rock 753  C 753 S liq.  ia
au 10 Torsion 118  D 118 gas 132
bg 11 CH2 a-str 3013  D  ia 3013 dp
bg 12 CH2 twist 1255  C  ia 1255 p SF(«nu»3)
bg 13 CH2 rock 933  C  ia 933 p
bu 14 CH2 s-str 2974  D 2974 S liq.  ia
bu 15 CH2 scis 1441  D 1441 M liq.  ia
bu 16 CH2 wag 1186  C 1186 VS liq. 1186 liq.
bu 17 CBr str 589  C 589 S liq.  ia
bu 18 CCBr deform 193  D 193 liq.  ia

Source: Shimanouchi, 1972

Gauche form     Symmetry:   C2     Symmetry Number sigma = 2


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

a 1 CH2 a-str 3005  D 3005 liq. SF(«nu»11)
a 2 CH2 s-str 2953  D 2953 VS liq. 2953 p liq. SF(«nu»12)
a 3 CH2 scis 1420  C 1420 M liq. 1419 dp liq. SF(«nu»13)
a 4 CH2 wag 1278  C 1278 M liq. 1276 liq.
a 5 CH2 twist 1104  C 1104 M liq. 1104 dp liq. SF(«nu»15)
a 6 CC str 1019  C 1019 M liq. 1019 liq.
a 7 CH2 rock 898  C 898 M liq. 899 p liq.
a 8 CBr str 550  C 550 M liq. 551 liq.
a 9 CCBr deform 231  C 231 p liq.
a 10 Torsion 91  D 91 dp liq.
b 11 CH2 a-str 3005  D 3005 liq. SF(«nu»1)
b 12 CH2 s-str 2953  D 2953 VS liq. 2953 p liq. SF(«nu»2)
b 13 CH2 scis 1420  C 1420 M liq. 1419 dp liq. SF(«nu»3)
b 14 CH2 wag 1245  C 1245 S liq. 1243 liq.
b 15 CH2 twist 1104  C 1104 W liq. 1104 dp liq. SF(«nu»5)
b 16 CH2 rock 836  C 836 S liq. 836 dp liq.
b 17 CBr str 589  C 589 S liq. 583 dp liq.
b 18 CCBr deform 355  C 355 liq. 355 dp liq.

Source: Shimanouchi, 1972

Notes

VSVery strong
SStrong
MMedium
WWeak
iaInactive
pPolarized
dpDepolarized
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

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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