Hydrogen bromide

• Formula: BrH
• Molecular weight: 80.912
• IUPAC Standard InChI: InChI=1S/BrH/h1H Copy

  
• IUPAC Standard InChIKey: CPELXLSAUQHCOX-UHFFFAOYSA-N Copy
• CAS Registry Number: 10035-10-6
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
  The 3d structure may be viewed using Java or Javascript.
• Other names: Hydrobromic acid; Anhydrous hydrobromic acid; HBr; Hydrogen bromide, anhydrous-; Acide bromhydrique; Acido bromidrico; Bromowodor; Bromwasserstoff; Broomwaterstof; UN 1048; UN 1788; Hydrogen monobromide
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• Information on this page:
  • Gas phase thermochemistry data
  • Phase change data
  • Henry's Law data
  • Gas phase ion energetics data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • Constants of diatomic molecules
  • References
  • Notes
• Other data available:
  • Reaction thermochemistry data: reactions 1 to 50, reactions 51 to 76
  • Ion clustering data
• Data at other public NIST sites:
  • Microwave spectra (on physics lab web site)
  • Gas Phase Kinetics Database
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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.

Gas Phase Heat Capacity (Shomate Equation)

C_p° = 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
    C_p = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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Phase change 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.

Data compiled as indicated in comments:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director

Antoine Equation Parameters

log₁₀(P) = A − (B / (T + C))
    P = vapor pressure (bar)
    T = temperature (K)

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Henry's Law 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.

Data compiled by: Rolf Sander

Henry's Law constant (water solution)

k_H(T) = k°_H exp(d(ln(k_H))/d(1/T) ((1/T) - 1/(298.15 K)))
k°_H = Henry's law constant for solubility in water at 298.15 K (mol/(kg*bar))
d(ln(k_H))/d(1/T) = Temperature dependence constant (K)

Gas phase ion energetics 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.

Data evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
L - Sharon G. Lias

Data compiled as indicated in comments:
B - John E. Bartmess
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

View reactions leading to HBr⁺ (ion structure unspecified)

Ionization energy determinations

De-protonation reactions

 +  =

By formula: Br^- + H⁺ = HBr

IR Spectrum

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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: Coblentz Society, Inc.

Gas Phase Spectrum

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Notice: Except where noted, spectra from this collection were measured on dispersive instruments, often in carefully selected solvents, and hence may differ in detail from measurements on FTIR instruments or in other chemical environments. More information on the manner in which spectra in this collection were collected can be found here.

Notice: Concentration information is not available for this spectrum and, therefore, molar absorptivity values cannot be derived.

Additional Data

Mass spectrum (electron ionization)

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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: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

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Additional Data

Constants of diatomic molecules

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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: Klaus P. Huber and Gerhard H. Herzberg

Data collected through December, 1976

Notes

References

Go To: Top, Gas phase thermochemistry data, Phase change data, Henry's Law data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), Constants of diatomic molecules, Notes

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

Cox, Wagman, et al., 1984
Cox, J.D.; Wagman, D.D.; Medvedev, V.A., CODATA Key Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1. [all data]

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

Dreisbach, 1955
Dreisbach, R.R., Physical Properties of Chemical Compounds, Advances in Chemistry Series No. 15, Am. Chem. Soc.: Washington, D. C., 1955. [all data]

Maass and Russell, 1918
Maass, O.; Russell, J., Unsaturation and molecular compound formation, J. Am. Chem. Soc., 1918, 40, 1561-1573. [all data]

Beckmann and Waentig, 1910
Beckmann, E.; Waentig, P., Cryoscopic Measurements at Low Temperatures, Z. Anorg. Chem., 1910, 67, 17. [all data]

Stull, 1947
Stull, Daniel R., Vapor Pressure of Pure Substances. Organic and Inorganic Compounds, Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022 . [all data]

Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G., Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update, J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018 . [all data]

Kimura, Katsumata, et al., 1981
Kimura, K.; Katsumata, S.; Achiba, Y.; Yamazaki, T.; Iwata, S., Ionization energies, Ab initio assignments, and valence electronic structure for 200 molecules in Handbook of HeI Photoelectron Spectra of Fundamental Organic Compounds, Japan Scientific Soc. Press, Tokyo, 1981. [all data]

Tiedemann, Anderson, et al., 1979
Tiedemann, P.W.; Anderson, S.L.; Ceyer, S.T.; Hirooka, T.; Ng, C.Y.; Mahan, B.H.; Lee, Y.T., Proton affinities of hydrogen halides determined by the molecular beam photoionization method, J. Chem. Phys., 1979, 71, 605. [all data]

Huber and Herzberg, 1979
Huber, K.P.; Herzberg, G., Molecular Spectra and Molecular Structure. IV. Constants of Diatomic Molecules,, Van Nostrand Reinhold Co., 1979, ,1. [all data]

Delwiche, Natalis, et al., 1973
Delwiche, J.; Natalis, P.; Momigny, J.; Collin, J.E., On the photoelectron spectra of HBr DBr, J. Electron Spectrosc. Relat. Phenom., 1973, 1, 219. [all data]

Haugh and Bayes, 1971
Haugh, M.J.; Bayes, K.D., Predissociation and dissociation energy of HBr⁺, J. Phys. Chem., 1971, 75, 1472. [all data]

Lempka, Passmore, et al., 1968
Lempka, H.J.; Passmore, T.R.; Price, W.C., The photoelectron spectra and ionized states of the halogen acids, Proc. Roy. Soc. (London), 1968, A304, 53. [all data]

Frost, McDowell, et al., 1967
Frost, D.C.; McDowell, C.A.; Vroom, D.A., Photoelectron spectra of the halogens and the hydrogen halides, J. Chem. Phys., 1967, 46, 4255. [all data]

Watanabe, 1957
Watanabe, K., Ionization potentials of some molecules, J. Chem. Phys., 1957, 26, 542. [all data]

Blondel, Cacciani, et al., 1989
Blondel, C.; Cacciani, P.; Delsart, C.; Trainham, R., High Resolution Determination of the Electron Affinity of Fluorine and Bromine using Crossed Ion and Laser Beams, Phys. Rev. A, 1989, 40, 7, 3698, https://doi.org/10.1103/PhysRevA.40.3698 . [all data]

Taft and Bordwell, 1988
Taft, R.W.; Bordwell, F.G., Structural and Solvent Effects Evaluated from Acidities Measured in Dimethyl Sulfoxide and in the Gas Phase, Acc. Chem. Res., 1988, 21, 12, 463, https://doi.org/10.1021/ar00156a005 . [all data]

Check, Faust, et al., 2001
Check, C.E.; Faust, T.O.; Bailey, J.M.; Wright, B.J.; Gilbert, T.M.; Sunderlin, L.S., Addition of Polarization and Diffuse Functions to the LANL2DZ Basis Set for P-Block Elements, J. Phys. Chem. A,, 2001, 105, 34, 8111, https://doi.org/10.1021/jp011945l . [all data]

Barrow and Stamper, 1961
Barrow, R.F.; Stamper, J.G., The absorption spectrum of gaseous hydrogen bromide in the Schumann region. I. Rotational analysis, Proc. R. Soc. London A, 1961, 263, 259. [all data]

Stamper, 1962
Stamper, J.G., The absorption spectrum of DBr in the vacuum ultraviolet region, Can. J. Phys., 1962, 40, 1279. [all data]

Ginter and Tilford, 1971
Ginter, M.L.; Tilford, S.G., Electronic spectra and structure of the hydrogen halides. States associated with the (σ²π³)cπ and (σ²π³) cσ configurations of HBr and DBr, J. Mol. Spectrosc., 1971, 37, 159. [all data]

Stamper and Barrow, 1961
Stamper, J.G.; Barrow, R.F., The V(¹Σ⁺)-N(¹Σ⁺) transition of hydrogen bromide, J. Phys. Chem., 1961, 65, 250. [all data]

Bates, Halford, et al., 1935
Bates, J.R.; Halford, J.O.; Anderson, L.C., A comparison of some physical properties of hydrogen and deuterium bromides, J. Chem. Phys., 1935, 3, 531. [all data]

Goodeve and Taylor, 1935
Goodeve, C.F.; Taylor, A.W.C., The continuous absorption spectrum of hydrogen bromide, Proc. R. Soc. London A, 1935, 152, 221. [all data]

Datta and Chakravarty, 1941
Datta, S.; Chakravarty, B., The continuous absorption spectra of the hydrogen-halides. Part I - HBr, Proc. Natl. Inst. Sci. India, 1941, 7, 297. [all data]

Romand, 1949
Romand, J., Absorption ultraviolette dans la region de Schumann etude de: ClH, BrH et lH gazeux, Ann. Phys. (Paris), 1949, 4, 527. [all data]

Huebert and Martin, 1968
Huebert, B.J.; Martin, R.M., Gas-phase far-ultraviolet absorption spectrum of hydrogen bromide and hydrogen iodide, J. Phys. Chem., 1968, 72, 3046. [all data]

Rank, Fink, et al., 1965
Rank, D.H.; Fink, U.; Wiggins, T.A., High resolution measurements on the infrared absorption spectrum of HBr, J. Mol. Spectrosc., 1965, 18, 170. [all data]

Hansler and Oetjen, 1953
Hansler, R.L.; Oetjen, R.A., The infrared spectra of HCl, DCl, HBr, and NH₃ in the region from 40 to 140 microns, J. Chem. Phys., 1953, 21, 1340. [all data]

Jones and Gordy, 1964
Jones, G.; Gordy, W., Submillimeter-wave spectra of HCl and HBr, Phys. Rev., 1964, 136, 1229. [all data]

Van Dijk and Dymanus, 1969
Van Dijk, F.A.; Dymanus, A., Hyperfine structure of the rotational spectrum of HBr and in the submillimeter wave region, Chem. Phys. Lett., 1969, 4, 170. [all data]

Cherlow, Hyatt, et al., 1975
Cherlow, J.M.; Hyatt, H.A.; Porto, S.P.S., Raman scattering in hydrogen halide gases, J. Chem. Phys., 1975, 63, 3996. [all data]

Dabbousi, Meerts, et al., 1973
Dabbousi, O.B.; Meerts, W.L.; de Leeuw, F.H.; Dymanus, A., Stark-Zeeman hyperfine structure of H⁷⁹Br and H⁸¹Br by molecular-beam electric-resonance spectroscopy, Chem. Phys., 1973, 2, 473. [all data]

Bunker, 1972
Bunker, P.R., On the breakdown of the Born-Oppenheimer approximation for a diatomic molecule, J. Mol. Spectrosc., 1972, 5, 478. [all data]

Chamberlain and Gebbie, 1965
Chamberlain, J.E.; Gebbie, H.A., Sub-millimetre dispersion and rotational line strengths of the hydrogen halides, Nature (London), 1965, 208, 480. [all data]

Atwood, Vu, et al., 1967
Atwood, M.R.; Vu, H.; Vodar, B., Forme et structures fines de la bande induite par la pression dans la bande fondamentale de vibration-rotation des molecules HF, HCl et HBr, Spectrochim. Acta, 1967, 23, 553. [all data]

Weiss and Cole, 1967
Weiss, S.; Cole, R.H., Pressure-induced rotational quadrupole spectra of HCl and HBr, J. Chem. Phys., 1967, 46, 644. [all data]

Babrov, 1964
Babrov, H.J., Strengths and self-broadened widths of the lines of the hydrogen bromide fundamental band, J. Chem. Phys., 1964, 40, 831. [all data]

Pourcin, Bachet, et al., 1967
Pourcin, J.; Bachet, G.; Coulon, R., Possibilite d'une absorption non resonnante induite dans le spectre de rotation pure de HBr gazeux perturbe par des gaz comprimes, C.R. Acad. Sci. Paris, Ser. B, 1967, 264, 975. [all data]

van Dijk and Dymanus, 1974
van Dijk, F.A.; Dymanus, A., Hyperfine and Stark spectrum of DBr in the millimeter-wave region, Chem. Phys., 1974, 6, 474. [all data]

Schurin and Rollefson, 1957
Schurin, B.; Rollefson, R., Infrared dispersion of hydrogen bromide, J. Chem. Phys., 1957, 26, 1089. [all data]

Tokuhiro, 1967
Tokuhiro, T., Vibrational and rotational effects on the nuclear quadrupole coupling constants in hydrogen, deuterium, and tritium halides, J. Chem. Phys., 1967, 47, 109. [all data]

van Dijk and Dymanus, 1970
van Dijk, F.A.; Dymanus, A., The electric dipole moment of HI and HBr, Chem. Phys. Lett., 1970, 5, 387. [all data]

Delwiche, Natalis, et al., 1972
Delwiche, J.; Natalis, P.; Momigny, J.; Collin, J.E., On the photoelectron spectra of HBr and DBr, J. Electron Spectrosc. Relat. Phenom., 1972, 1, 219. [all data]

Terwilliger and Smith, 1975
Terwilliger, D.T.; Smith, A.L., Autoionization in diatomics: measured line shape parameters and predicted photoelectron spectra for some autoionizing states of the hydrogen halides, J. Chem. Phys., 1975, 63, 1008. [all data]

Naude and Verleger, 1950
Naude, S.M.; Verleger, H., The vibration-rotation bands of the hydrogen halides HF, H³⁵Cl, H³⁷Cl, H⁷⁹Br, H⁸¹Br and H¹²⁷I, Proc. Phys. Soc. London Sect. A, 1950, 63, 470. [all data]

Thompson, Williams, et al., 1952
Thompson, H.W.; Williams, R.L.; Callomon, H.J., The fundamental vibration band of hydrogen bromide, Spectrochim. Acta, 1952, 5, 313. [all data]

Plyler, 1960
Plyler, E.K., Infrared spectrum of hydrobromic aid, J. Res. Nat. Bur. Stand. Sect. A, 1960, 64, 377. [all data]

Bernage, Niay, et al., 1973
Bernage, P.; Niay, P.; Bocquet, H.; Houdart, R., Etude des bandes d'absorption infrarouges v_0-3, v_0-4, v_0-5 de l'acide bromhydrique gazeux a l'aide d'un spectrometre sisam, Rev. Phys. Appl., 1973, 8, 333. [all data]

Mould, Price, et al., 1960
Mould, H.M.; Price, W.C.; Wilkinson, G.R., Infra-red emission from gases excited by a radio-frequency discharge, Spectrochim. Acta, 1960, 16, 479. [all data]

James and Thibault, 1965
James, T.C.; Thibault, R.J., Infrared-emission spectrum of HBr excited in an electric discharge. Determination of molecular constants, J. Chem. Phys., 1965, 42, 1450. [all data]

Ogilvie and Koo, 1976
Ogilvie, J.F.; Koo, D., Dunham potential energy coefficients of the hydrogen halides and carbon monoxide, J. Mol. Spectrosc., 1976, 61, 332-336. [all data]

Babrov, Shabott, et al., 1965
Babrov, H.J.; Shabott, A.L.; Rao, B.S., Matrix elements for vibration-rotation transitions in the HBr overtone and hot bands, J. Chem. Phys., 1965, 42, 4124. [all data]

Rao and Lindquist, 1968
Rao, B.S.; Lindquist, L.H., Dipole matrix elements for vibration-rotation lines in the 2-0 band of the hydrogen bromide molecule, Can. J. Phys., 1968, 46, 2739. [all data]

Gustafson and Rao, 1970
Gustafson, B.P.; Rao, B.S., Dipole matrix elements for vibration-rotation lines in the fundamental band of the hydrogen bromide molecule, Can. J. Phys., 1970, 48, 330. [all data]

Urquhart, Clark, et al., 1972
Urquhart, D.N.; Clark, T.D.; Rao, B.S., The dipole moment function of H⁷⁹Br molecule, Z. Naturforsch. A, 1972, 27, 1563. [all data]

Jacobi, 1967
Jacobi, N., Electrical anharmonicities of diatomic molecules, J. Mol. Spectrosc., 1967, 22, 76. [all data]

Tipping and Herman, 1970
Tipping, R.H.; Herman, R.M., Line intensities in HBr vibration-rotation spectra, J. Mol. Spectrosc., 1970, 36, 404. [all data]

Rao, 1971
Rao, B.S., Vibration-rotation band strengths and dipole moment function of the H⁷⁹Br molecule, J. Phys. B:, 1971, 4, 791. [all data]

Notes

Go To: Top, Gas phase thermochemistry data, Phase change data, Henry's Law data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), Constants of diatomic molecules, References

• Symbols used in this document:
  

  IE (evaluated)	Recommended ionization energy
  S°gas,1 bar	Entropy of gas at standard conditions (1 bar)
  Tfus	Fusion (melting) point
  d(ln(kH))/d(1/T)	Temperature dependence parameter for Henry's Law constant
  k°H	Henry's Law constant at 298.15K
  ΔfH°gas	Enthalpy of formation of gas at standard conditions
  ΔrG°	Free energy of reaction at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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