Dibromoborane

Gas phase thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Quantity Value Units Method Reference Comment
ΔfH°gas15.00kcal/molReviewChase, 1998Data last reviewed in December, 1964
Quantity Value Units Method Reference Comment
S°gas,1 bar70.406cal/mol*KReviewChase, 1998Data last reviewed in December, 1964

Gas Phase Heat Capacity (Shomate Equation)

Cp° = A + B*t + C*t2 + D*t3 + E/t2
H° − H°298.15= A*t + B*t2/2 + C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − E/(2*t2) + G
    Cp = heat capacity (cal/mol*K)
    H° = standard enthalpy (kcal/mol)
    S° = standard entropy (cal/mol*K)
    t = temperature (K) / 1000.

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Temperature (K) 298. to 6000.
A 13.31690
B 0.498939
C -0.134062
D 0.011380
E -0.182593
F 10.39650
G 85.35239
H 15.00000
ReferenceChase, 1998
Comment Data last reviewed in December, 1964

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: Marilyn E. Jacox

State:   ?
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
gas 240 390 Biehl, Smith, et al., 1996

State:   ?
 Energy 
 (cm-1) 		  Med.   Transition   λmin 
 (nm) 		  λmax 
 (nm) 		  References
Tx = 15900 Ar Moroz and Sweany, 1992

State:   X

Vib. 
sym. 		  No.   Approximate 
 type of mode 		  cm-1   Med.   Method   References
a1 1 Sym. stretch 551.0 w Ar IR Moroz and Sweany, 1992
b2 3 Asym. stretch 833.4 s Ar IR Miller and Andrews, 1980
Moroz and Sweany, 1992
Hassanzadeh and Andrews, 1993

Additional references: Jacox, 1994, page 89; Jacox, 1998, page 192

Notes

wWeak
sStrong
xEnergy separation between the band maximum of the excited electronic state and the v = 0 level of the ground state.

References

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Biehl, Smith, et al., 1996
Biehl, H.; Smith, D.M.; Tuckett, R.P.; Yoxall, K.R.; Baumgartel, H.; Jochims, H.W.; Rokland, U., Mol. Phys., 1996, 87, 1199. [all data]

Moroz and Sweany, 1992
Moroz, A.; Sweany, R.L., Photolysis of argon matrixes containing tribromoboron and dihydrogen: synthesis of hydroboranes via dibromoboron, Inorg. Chem., 1992, 31, 25, 5236, https://doi.org/10.1021/ic00051a015 . [all data]

Miller and Andrews, 1980
Miller, J.H.; Andrews, L., Matrix photoionization and radiolysis of boron trihalides. Infrared and ultraviolet spectra of boron trichloride(1+) and boron tribromide(1+) and infrared spectra of boron dichloride and boron dibromide, J. Am. Chem. Soc., 1980, 102, 15, 4900, https://doi.org/10.1021/ja00535a011 . [all data]

Hassanzadeh and Andrews, 1993
Hassanzadeh, P.; Andrews, L., Reaction of halogens with laser-ablated boron: infrared spectra of BXn (X = F, Cl, Br, I; n = 1, 2, 3) in solid argon, J. Phys. Chem., 1993, 97, 19, 4910, https://doi.org/10.1021/j100121a008 . [all data]

Jacox, 1994
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules, American Chemical Society, Washington, DC, 1994, 464. [all data]

Jacox, 1998
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules: supplement A, J. Phys. Chem. Ref. Data, 1998, 27, 2, 115-393, https://doi.org/10.1063/1.556017 . [all data]

Notes

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