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Diborane (11B2H6)


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 BH2 s-str 2524  C  ia 2524 p liq.
ag 2 Ring str 2104  C  ia 2104 p liq.
ag 3 BH2 scis 1180  C  ia 1180 liq.
ag 4 Ring deform 794  C  ia 794 p liq.
au 5 BH2 twist 833  C 833.1 ia VW gas  ia Observed very weakly & confirmed by combination bands
b1g 6 Ring str 1768  E  ia 1788 dp liq. FR(«nu»5+«nu»9)
b1g 6 Ring str 1768  E  ia 1747 dp liq. FR(«nu»5+«nu»9)
b1g 7 BH2 wag 850  E  ia OC(«nu»7+«nu»10)
b1u 8 BH2 a-str 2612  C 2612 VS gas  ia
b1u 9 BH2 rock 950  E  ia ?
b1u 10 Ring puck 368  C 368 S gas  ia
b2g 11 BH2 a-str 2591  C  ia 2591 dp liq.
b2g 12 BH2 rock 915  E  ia OC(«nu»10+«nu»12)
b2u 13 Ring str 1915  E 1887 M gas  ia
b2u 13 Ring str 1915  E 1999 W gas  ia
b2u 14 BH2 wag 973  C 973 S gas  ia
b3g 15 BH2 twist 1012  C  ia 1012 dp
b3u 16 BH2 s-str 2525  C 2525 VS  ia
b3u 17 Ring deform 1602  C 1602 VS  ia
b3u 18 BH2 scis 1177  C 1177 VS  ia

Source: Shimanouchi, 1972

Notes

VSVery strong
SStrong
MMedium
WWeak
VWVery weak
iaInactive
pPolarized
dpDepolarized
FRFermi resonance with an overtone or a combination tone indicated in the parentheses.
OCFrequency estimated from an overtone or a combination tone indicated in the parentheses.
C3~6 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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