Hydrogen bromide

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Gas phase thermochemistry data

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

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
Δfgas-36.29 ± 0.16kJ/molReviewCox, Wagman, et al., 1984CODATA Review value
Δfgas-36.44kJ/molReviewChase, 1998Data last reviewed in September, 1965
Quantity Value Units Method Reference Comment
gas,1 bar198.700 ± 0.004J/mol*KReviewCox, Wagman, et al., 1984CODATA Review value
gas,1 bar198.70J/mol*KReviewChase, 1998Data last reviewed in September, 1965

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

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View table.

Temperature (K) 298. to 1100.1100. to 6000.
A 31.7140932.88913
B -13.699922.822116
C 23.35567-0.478035
D -9.0085290.032464
E -0.028758-3.174958
F -45.57464-52.46318
G 240.0428230.8597
H -36.44306-36.44306
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in September, 1965 Data last reviewed in September, 1965

Phase change data

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

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

Quantity Value Units Method Reference Comment
Tfus186.1KN/ADreisbach, 1955Uncertainty assigned by TRC = 0.02 K; TRC
Tfus187.2KN/AMaass and Russell, 1918Uncertainty assigned by TRC = 1. K; TRC
Tfus187.15KN/ABeckmann and Waentig, 1910Uncertainty assigned by TRC = 1.5 K; TRC

Antoine Equation Parameters

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

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Temperature (K) A B C Reference Comment
134.3 to 206.74.02419695.466-33.542Stull, 1947Coefficents calculated by NIST from author's data.
206.7 to 343.84.15585754.969-25.086Stull, 1947Coefficents calculated by NIST from author's data.

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


Reaction thermochemistry data

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

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:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
MS - José A. Martinho Simões
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Reactions 1 to 50

Bromine anion + Hydrogen bromide = (Bromine anion • Hydrogen bromide)

By formula: Br- + HBr = (Br- • HBr)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Δr86.2 ± 8.4kJ/molTDAsCaldwell and Kebarle, 1985gas phase; B,M
Δr73.2kJ/molFADavidson, Fehsenfeld, et al., 1977gas phase; From thermochemical cycle,switching reaction(Br-/NO3-HNO3/HBr); DG>, ΔrH>; M
Quantity Value Units Method Reference Comment
Δr93.3J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; M
Δr92.J/mol*KFADavidson, Fehsenfeld, et al., 1977gas phase; From thermochemical cycle,switching reaction(Br-/NO3-HNO3/HBr); DG>, ΔrH>; M
Quantity Value Units Method Reference Comment
Δr58. ± 11.kJ/molTDAsCaldwell and Kebarle, 1985gas phase; B

Free energy of reaction

ΔrG° (kJ/mol) T (K) Method Reference Comment
39.367.FADavidson, Fehsenfeld, et al., 1977gas phase; From thermochemical cycle,switching reaction(Br-/NO3-HNO3/HBr); DG>, ΔrH>; M

Bromine anion + Hydrogen cation = Hydrogen bromide

By formula: Br- + H+ = HBr

Quantity Value Units Method Reference Comment
Δr1353.69 ± 0.21kJ/molD-EABlondel, Cacciani, et al., 1989gas phase; reported: 27129.170±0.015 cm-1; B
Δr1353. ± 8.8kJ/molG+TSTaft and Bordwell, 1988gas phase; B
Δr1341.4kJ/molN/ACheck, Faust, et al., 2001gas phase; F-; ; ΔS(acid)=19.2; ΔS(EA)=6.4; B
Quantity Value Units Method Reference Comment
Δr1331.8 ± 0.63kJ/molH-TSBlondel, Cacciani, et al., 1989gas phase; reported: 27129.170±0.015 cm-1; B
Δr1331. ± 8.4kJ/molIMRETaft and Bordwell, 1988gas phase; B
Δr1319.6kJ/molN/ACheck, Faust, et al., 2001gas phase; F-; ; ΔS(acid)=19.2; ΔS(EA)=6.4; B

C8H6MoO3 (cr) + Bromine (solution) = Hydrogen bromide (solution) + Cyclopentadienylmolybdenumtricarbonyl bromide (cr)

By formula: C8H6MoO3 (cr) + Br2 (solution) = HBr (solution) + C8H5BrMoO3 (cr)

Quantity Value Units Method Reference Comment
Δr-150. ± 12.kJ/molN/ANolan, López de la Vega, et al., 1986solvent: Carbon tetrachloride; The reaction enthalpy was calculated Nolan, López de la Vega, et al., 1986 from the experimental values for the enthalpies of the following reactions: Mo(Cp)(CO)3(H)(cr) + 2Br2(solution) = Mo(Cp)(CO)2(Br)3(solution) + HBr(solution) + CO(solution), -254.0 ± 8.4 kJ/mol, and Mo(Cp)(CO)3(Br)(cr) + Br2(solution) = Mo(Cp)(CO)2(Br)3(solution) + CO(solution), -104.2 ± 8.4 kJ/mol; MS

NO3 anion + Hydrogen bromide = (NO3 anion • Hydrogen bromide)

By formula: NO3- + HBr = (NO3- • HBr)

Quantity Value Units Method Reference Comment
Δr96.J/mol*KN/ADavidson, Fehsenfeld, et al., 1977gas phase; switching reaction(NO3-)HNO3, Entropy change calculated or estimated, DG<, ΔrH<; M
Quantity Value Units Method Reference Comment
Δr73. ± 16.kJ/molTDEqDavidson, Fehsenfeld, et al., 1977gas phase; Anchored to HBr..Br- in Caldwell and Kebarle, 1985.; B

Free energy of reaction

ΔrG° (kJ/mol) T (K) Method Reference Comment
53.1367.FADavidson, Fehsenfeld, et al., 1977gas phase; switching reaction(NO3-)HNO3, Entropy change calculated or estimated, DG<, ΔrH<; M

Iodide + Hydrogen bromide = (Iodide • Hydrogen bromide)

By formula: I- + HBr = (I- • HBr)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Δr67.4 ± 8.4kJ/molTDEqCaldwell and Kebarle, 1985gas phase; B,M
Quantity Value Units Method Reference Comment
Δr82.0J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; switching reaction(I-)SO2; M
Quantity Value Units Method Reference Comment
Δr43. ± 11.kJ/molTDEqCaldwell and Kebarle, 1985gas phase; B

Free energy of reaction

ΔrG° (kJ/mol) T (K) Method Reference Comment
42.7300.PHPMSCaldwell and Kebarle, 1985gas phase; switching reaction(I-)SO2; M

Hydrogen bromide + Propene = Propane, 2-bromo-

By formula: HBr + C3H6 = C3H7Br

Quantity Value Units Method Reference Comment
Δr-85.48kJ/molCmLacher, Kianpour, et al., 1957gas phase; ALS
Δr-83.889kJ/molCmLacher, Lea, et al., 1950gas phase; Heat of hydrobromination at 367°K; ALS
Δr-84.10 ± 0.59kJ/molCmLacher, Walden, et al., 1950gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -84.4 ± 1.0 kJ/mol; Heat of hydrobromination; ALS

(Bromine anion • Sulfur dioxide) + Hydrogen bromide = (Bromine anion • Hydrogen bromide • Sulfur dioxide)

By formula: (Br- • O2S) + HBr = (Br- • HBr • O2S)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Δr51.0kJ/molPHPMSCaldwell and Kebarle, 1985gas phase; From thermochemical cycle,switching reaction(Br- HBr)SO2; M
Quantity Value Units Method Reference Comment
Δr80.3J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; From thermochemical cycle,switching reaction(Br- HBr)SO2; M

(NO3 anion • Nitric acid) + Hydrogen bromide = (NO3 anion • Hydrogen bromide • Nitric acid)

By formula: (NO3- • HNO3) + HBr = (NO3- • HBr • HNO3)

Quantity Value Units Method Reference Comment
Δr66.9kJ/molFADavidson, Fehsenfeld, et al., 1977gas phase; switching reaction(NO3-)2HNO3; M
Quantity Value Units Method Reference Comment
Δr95.8J/mol*KFADavidson, Fehsenfeld, et al., 1977gas phase; switching reaction(NO3-)2HNO3; M
Quantity Value Units Method Reference Comment
Δr38.kJ/molFADavidson, Fehsenfeld, et al., 1977gas phase; switching reaction(NO3-)2HNO3; M

Hydrogen bromide (g) + CH3BrMg (solution) = Methane (solution) + Br2Mg (solution)

By formula: HBr (g) + CH3BrMg (solution) = CH4 (solution) + Br2Mg (solution)

Quantity Value Units Method Reference Comment
Δr-274.5 ± 2.2kJ/molRSCHolm, 1981solvent: Diethyl ether; The enthalpy of formation was calculated using the assumptions and the auxiliary data in Holm, 1981, except for the organic compound, whose enthalpy of formation was quoted from Pedley, 1994; MS

(Bromine anion • Hydrogen bromide) + Hydrogen bromide = (Bromine anion • 2Hydrogen bromide)

By formula: (Br- • HBr) + HBr = (Br- • 2HBr)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Δr46.0kJ/molPHPMSCaldwell and Kebarle, 1985gas phase; M
Quantity Value Units Method Reference Comment
Δr71.1J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; M

2,5-Pyrrolidinedione, 1-bromo- + 0.5Hydrazine = Hydrogen bromide + Succinimide + 0.5Nitrogen

By formula: C4H4BrNO2 + 0.5H4N2 = HBr + C4H5NO2 + 0.5N2

Quantity Value Units Method Reference Comment
Δr-260.3 ± 0.46kJ/molCmHoward and Skinner, 1966solid phase; solvent: Aqueous solution; Reanalyzed by Pedley, Naylor, et al., 1986, Original value = -261.7 ± 0.46 kJ/mol; ALS

Methyl cation + Hydrogen bromide = (Methyl cation • Hydrogen bromide)

By formula: CH3+ + HBr = (CH3+ • HBr)

Quantity Value Units Method Reference Comment
Δr232.kJ/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 202. kJ/mol; Foster, Williamson, et al., 1974; M

C4H9Li (l) + Hydrogen bromide (g) = Butane (l) + Lithium bromide (cr)

By formula: C4H9Li (l) + HBr (g) = C4H10 (l) + BrLi (cr)

Quantity Value Units Method Reference Comment
Δr-374.0 ± 2.0kJ/molRSCHolm, 1974Please also see Pedley and Rylance, 1977. The reaction enthalpy was quoted from Pedley and Rylance, 1977. See Liebman, Martinho Simões, et al., 1995 for comments; MS

Hydrogen bromide (g) + methyllithium (cr) = Methane (g) + Lithium bromide (cr)

By formula: HBr (g) + CH3Li (cr) = CH4 (g) + BrLi (cr)

Quantity Value Units Method Reference Comment
Δr-317.3 ± 2.0kJ/molRSCHolm, 1974Please also see Pedley and Rylance, 1977. The reaction enthalpy was quoted from Pedley and Rylance, 1977. See Liebman, Martinho Simões, et al., 1995 for comments; MS

Hydrogen bromide (g) + ethyllithium (cr) = Ethane (g) + Lithium bromide (cr)

By formula: HBr (g) + C2H5Li (cr) = C2H6 (g) + BrLi (cr)

Quantity Value Units Method Reference Comment
Δr-345.7 ± 2.0kJ/molRSCHolm, 1974Please also see Pedley and Rylance, 1977. The reaction enthalpy was quoted from Pedley and Rylance, 1977. See Liebman, Martinho Simões, et al., 1995 for comments; MS

Hydrogen bromide (g) + C4H9Li (l) = Butane (l) + Lithium bromide (cr)

By formula: HBr (g) + C4H9Li (l) = C4H10 (l) + BrLi (cr)

Quantity Value Units Method Reference Comment
Δr-352.7 ± 2.0kJ/molRSCHolm, 1974Please also see Pedley and Rylance, 1977. The reaction enthalpy was quoted from Pedley and Rylance, 1977. See Liebman, Martinho Simões, et al., 1995 for comments; MS

(NO3 anion • Hydrogen bromide) + Nitric acid = (NO3 anion • Nitric acid • Hydrogen bromide)

By formula: (NO3- • HBr) + HNO3 = (NO3- • HNO3 • HBr)

Quantity Value Units Method Reference Comment
Δr66.9 ± 8.4kJ/molTDEqDavidson, Fehsenfeld, et al., 1977gas phase; B
Quantity Value Units Method Reference Comment
Δr40. ± 12.kJ/molTDEqDavidson, Fehsenfeld, et al., 1977gas phase; B

Hydrogen bromide + 2-Butene, (Z)- = Butane, 2-bromo-

By formula: HBr + C4H8 = C4H9Br

Quantity Value Units Method Reference Comment
Δr-77.07 ± 0.50kJ/molCmLacher, Billings, et al., 1952gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -76.8 ± 6.6 kJ/mol; Heat of Hydrobromination at 373 K; ALS

Hydrogen bromide + 2-Butene, (E)- = Butane, 2-bromo-

By formula: HBr + C4H8 = C4H9Br

Quantity Value Units Method Reference Comment
Δr-72.22 ± 0.50kJ/molCmLacher, Billings, et al., 1952gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -72.6 ± 5.6 kJ/mol; Heat of hydrobromination at 373 K; ALS

Hydrogen bromide + 1-Butene = Butane, 2-bromo-

By formula: HBr + C4H8 = C4H9Br

Quantity Value Units Method Reference Comment
Δr-83.85 ± 0.50kJ/molCmLacher, Billings, et al., 1952gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -84.3 ± 7.5 kJ/mol; Heat of hydrobromination at 367 K; ALS

Hydrogen bromide + Cyclopropane = Propane, 1-bromo-

By formula: HBr + C3H6 = C3H7Br

Quantity Value Units Method Reference Comment
Δr-107.8 ± 1.3kJ/molCmLacher, Kianpour, et al., 1957gas phase; ALS
Δr-94.94 ± 0.65kJ/molCmLacher, Walden, et al., 1950gas phase; Heat of hydrobromination; ALS

(Bromine anion • Hydrogen bromide) + Sulfur dioxide = (Bromine anion • Sulfur dioxide • Hydrogen bromide)

By formula: (Br- • HBr) + O2S = (Br- • O2S • HBr)

Quantity Value Units Method Reference Comment
Δr45.6kJ/molPHPMSCaldwell and Kebarle, 1985gas phase; M
Quantity Value Units Method Reference Comment
Δr79.1J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; M

Acetyl bromide + Water = Hydrogen bromide + Acetic acid

By formula: C2H3BrO + H2O = HBr + C2H4O2

Quantity Value Units Method Reference Comment
Δr-97.53kJ/molCmDevore and O'Neal, 1969liquid phase; Heat of hydrolysis; ALS
Δr-96.48kJ/molCmCarson and Skinner, 1949liquid phase; ALS

Hydrogen + Propane, 2-bromo- = Hydrogen bromide + Propane

By formula: H2 + C3H7Br = HBr + C3H8

Quantity Value Units Method Reference Comment
Δr-45.40 ± 0.92kJ/molChydDavies, Lacher, et al., 1965gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -45.06 kJ/mol; ALS

Hydrogen bromide + Benzene, (bromomethyl)- = Toluene + Bromine

By formula: HBr + C7H7Br = C7H8 + Br2

Quantity Value Units Method Reference Comment
Δr33.9 ± 4.2kJ/molEqkBenson and Buss, 1957gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = 33. ± 4. kJ/mol; ALS

Propane, 2,2-dibromo- = Hydrogen bromide + Isopropenyl bromide

By formula: C3H6Br2 = HBr + C3H5Br

Quantity Value Units Method Reference Comment
Δr64.9kJ/molEqkLevanova, Rodova, et al., 1983liquid phase; Flow reactor; ALS
Δr69.9 ± 0.8kJ/molEqkSharonov and Rozhnov, 1971gas phase; ALS

Methane, bromotrinitro- + 218.5Water + 11.25Oxygen + Diethyl Phthalate = Hydrogen bromide + 13Carbon dioxide + 1.5Nitrogen

By formula: CBrN3O6 + 218.5H2O + 11.25O2 + C12H14O4 = HBr + 13CO2 + 1.5N2

Quantity Value Units Method Reference Comment
Δr-6350.2 ± 1.0kJ/molCcrCarpenter, Zimmer, et al., 1970liquid phase; The HBr is in 225H2O; ALS

Ethyl bromide = Hydrogen bromide + Ethylene

By formula: C2H5Br = HBr + C2H4

Quantity Value Units Method Reference Comment
Δr80.3 ± 2.1kJ/molEqkLane, Linnett, et al., 1953gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = 79.9 kJ/mol; ALS

C8H6MoO3 (cr) + 2Bromine (solution) = C7H5Br3MoO2 (solution) + Hydrogen bromide (solution) + Carbon monoxide (solution)

By formula: C8H6MoO3 (cr) + 2Br2 (solution) = C7H5Br3MoO2 (solution) + HBr (solution) + CO (solution)

Quantity Value Units Method Reference Comment
Δr-254.0 ± 8.4kJ/molRSCNolan, López de la Vega, et al., 1986solvent: Carbon tetrachloride; MS

Propanedioic acid + Bromine = Hydrogen bromide + Propanedioic acid, 2-bromo-

By formula: C3H4O4 + Br2 = HBr + C3H3BrO4

Quantity Value Units Method Reference Comment
Δr-66.0 ± 2.9kJ/molCmKoros, Orban, et al., 1979liquid phase; solvent: Sulfuric acid (1M); Bromination; ALS

Benzenamine, 4-methoxy- + Benzoyl bromide = Hydrogen bromide + p-Benzanisidide

By formula: C7H9NO + C7H5BrO = HBr + C14H13NO2

Quantity Value Units Method Reference Comment
Δr-172. ± 0.8kJ/molCacKiselev, Khuzyasheva, et al., 1979liquid phase; solvent: Benzene; ALS

p-Aminotoluene + Benzoyl bromide = Hydrogen bromide + Benzamide, N-(4-methylphenyl)-

By formula: C7H9N + C7H5BrO = HBr + C14H13NO

Quantity Value Units Method Reference Comment
Δr-170. ± 0.8kJ/molCacKiselev, Khuzyasheva, et al., 1979liquid phase; solvent: Benzene; ALS

Hydrogen bromide + Bromoacetone = Acetone + Bromine

By formula: HBr + C3H5BrO = C3H6O + Br2

Quantity Value Units Method Reference Comment
Δr31.1 ± 8.4kJ/molEqkKing, Golden, et al., 1971gas phase; Heat of bromination at 516-618 K; ALS

Hydrogen bromide + Ethene, tetrafluoro- = 1-Bromo-1,1,2,2-tetrafluoroethane

By formula: HBr + C2F4 = C2HBrF4

Quantity Value Units Method Reference Comment
Δr-137.75 ± 0.75kJ/molCmLacher, Lea, et al., 1950gas phase; Heat of hydrobromination at 367°K; ALS

Benzoyl bromide + Aniline = Hydrogen bromide + Benzamide, N-phenyl-

By formula: C7H5BrO + C6H7N = HBr + C13H11NO

Quantity Value Units Method Reference Comment
Δr-162. ± 0.8kJ/molCacKiselev, Khuzyasheva, et al., 1979liquid phase; solvent: Benzene; ALS

Hydrogen bromide + Ethene, chlorotrifluoro- = 1-Bromo-2-chloro-1,1,2-trifluoroethane

By formula: HBr + C2ClF3 = C2HBrClF3

Quantity Value Units Method Reference Comment
Δr-109.09 ± 0.95kJ/molCmLacher, Lea, et al., 1950gas phase; Heat of hydrobromination at 367°K; ALS

Carbonic dibromide + Water = 2Hydrogen bromide + Carbon dioxide

By formula: CBr2O + H2O = 2HBr + CO2

Quantity Value Units Method Reference Comment
Δr-205.3 ± 0.67kJ/molCmAnthoney, Finch, et al., 1970liquid phase; Heat of hydrolysis; ALS

1-Bromo-1-chloroethane = Hydrogen bromide + Ethene, chloro-

By formula: C2H4BrCl = HBr + C2H3Cl

Quantity Value Units Method Reference Comment
Δr83.3 ± 0.8kJ/molEqkBusheva, Levanova, et al., 1980gas phase; Dehydrohalogenation; ALS

Hydrogen bromide (g) + C2H3BrMg (solution) = Ethylene (solution) + Br2Mg (solution)

By formula: HBr (g) + C2H3BrMg (solution) = C2H4 (solution) + Br2Mg (solution)

Quantity Value Units Method Reference Comment
Δr-294.1 ± 2.2kJ/molRSCHolm, 1981solvent: Tetrahydrofuran; MS

C4H9BrMg (solution) + Hydrogen bromide (g) = Butane (solution) + Br2Mg (solution)

By formula: C4H9BrMg (solution) + HBr (g) = C4H10 (solution) + Br2Mg (solution)

Quantity Value Units Method Reference Comment
Δr-292.5 ± 2.2kJ/molRSCHolm, 1981solvent: Diethyl ether; MS

C4H9BrMg (solution) + Hydrogen bromide (g) = Butane (solution) + Br2Mg (solution)

By formula: C4H9BrMg (solution) + HBr (g) = C4H10 (solution) + Br2Mg (solution)

Quantity Value Units Method Reference Comment
Δr-305.9 ± 2.2kJ/molRSCHolm, 1981solvent: Diethyl ether; MS

C5H11BrMg (solution) + Hydrogen bromide (g) = Pentane (solution) + Br2Mg (solution)

By formula: C5H11BrMg (solution) + HBr (g) = C5H12 (solution) + Br2Mg (solution)

Quantity Value Units Method Reference Comment
Δr-306.3 ± 2.2kJ/molRSCHolm, 1981solvent: Diethyl ether; MS

C19H15BrMg (solution) + Hydrogen bromide (g) = Triphenylmethane (solution) + Br2Mg (solution)

By formula: C19H15BrMg (solution) + HBr (g) = C19H16 (solution) + Br2Mg (solution)

Quantity Value Units Method Reference Comment
Δr-231.0 ± 2.2kJ/molRSCHolm, 1981solvent: Diethyl ether; MS

1-Propene, 3-bromo- + Water = Hydrogen bromide + 2-Propen-1-ol

By formula: C3H5Br + H2O = HBr + C3H6O

Quantity Value Units Method Reference Comment
Δr-15.kJ/molCmGellner and Skinner, 1949liquid phase; Heat of hydrolysis; ALS

Benzene, (bromomethyl)- + Water = Hydrogen bromide + Benzyl alcohol

By formula: C7H7Br + H2O = HBr + C7H8O

Quantity Value Units Method Reference Comment
Δr-7.9kJ/molCmGellner and Skinner, 1949liquid phase; Heat of hydrloysis; ALS

C3H7BrMg (solution) + Hydrogen bromide (g) = Propane (solution) + Br2Mg (solution)

By formula: C3H7BrMg (solution) + HBr (g) = C3H8 (solution) + Br2Mg (solution)

Quantity Value Units Method Reference Comment
Δr-305.9 ± 2.2kJ/molRSCHolm, 1981solvent: Diethyl ether; MS

Benzoyl bromide + Water = Hydrogen bromide + Benzoic acid

By formula: C7H5BrO + H2O = HBr + C7H6O2

Quantity Value Units Method Reference Comment
Δr-113.1kJ/molCmCarson, Pritchard, et al., 1950liquid phase; Heat of hydrolysis; ALS

Hydrogen bromide (g) + C2H5BrMg (solution) = Ethane (solution) + Br2Mg (solution)

By formula: HBr (g) + C2H5BrMg (solution) = C2H6 (solution) + Br2Mg (solution)

Quantity Value Units Method Reference Comment
Δr-299.2 ± 2.2kJ/molRSCHolm, 1981solvent: Diethyl ether; MS

Benzyltrimethylammonium bromide = Hydrogen bromide + C10H15N

By formula: C10H16N.Br = HBr + C10H15N

Quantity Value Units Method Reference Comment
Δr-88. ± 4.kJ/molCmArnett and Wernett, 1993liquid phase; solvent: DMSO; ALS

Hydrogen bromide + α-Methylstyrene = Benzene, (1-bromo-1-methylethyl)-

By formula: HBr + C9H10 = C9H11Br

Quantity Value Units Method Reference Comment
Δr-63.6 ± 5.4kJ/molCmNesterova, Kovzel, et al., 1977liquid phase; Hydrobromination; ALS

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)

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

H (mol/(kg*bar)) d(ln(kH))/d(1/T) (K) Method Reference Comment
0.726100.CN/A missing citation refer to missing citation and missing citation but this value cannot be found there.
25.650.QN/AOnly the tabulated data between T = 273. K and T = 303. K from missing citation was used to derive kH and -Δ kH/R. Above T = 303. K the tabulated data could not be parameterized by equation (reference missing) very well. The partial pressure of water vapor (needed to convert some Henry's law constants) was calculated using the formula given by missing citation. The quantities A and α from missing citation were assumed to be identical.
1.3×10+9/KA10000.TN/AFor strong acids, the solubility is often expressed as kH = ([H+] * [A-]) / p(HA). To obtain the physical solubility of HA, the value has to be divided by the acidity constant KA. missing citation corrects erroneous data from missing citation.
7.1×10+8/KA10000.TN/A 

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)

Quantity Value Units Method Reference Comment
IE (evaluated)11.68 ± 0.03eVN/AN/AL
Quantity Value Units Method Reference Comment
Proton affinity (review)584.2kJ/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity557.7kJ/molN/AHunter and Lias, 1998HL

Ionization energy determinations

IE (eV) Method Reference Comment
11.71PEKimura, Katsumata, et al., 1981LLK
11.66 ± 0.02PITiedemann, Anderson, et al., 1979LLK
11.67EVALHuber and Herzberg, 1979LLK
11.645 ± 0.005PEDelwiche, Natalis, et al., 1973LLK
11.677 ± 0.004DERHaugh and Bayes, 1971LLK
11.67 ± 0.01PELempka, Passmore, et al., 1968RDSH
11.71 ± 0.01PEFrost, McDowell, et al., 1967RDSH
11.68 ± 0.03PIWatanabe, 1957RDSH

De-protonation reactions

Bromine anion + Hydrogen cation = Hydrogen bromide

By formula: Br- + H+ = HBr

Quantity Value Units Method Reference Comment
Δr1353.69 ± 0.21kJ/molD-EABlondel, Cacciani, et al., 1989gas phase; reported: 27129.170±0.015 cm-1; B
Δr1353. ± 8.8kJ/molG+TSTaft and Bordwell, 1988gas phase; B
Δr1341.4kJ/molN/ACheck, Faust, et al., 2001gas phase; F-; ; ΔS(acid)=19.2; ΔS(EA)=6.4; B
Quantity Value Units Method Reference Comment
Δr1331.8 ± 0.63kJ/molH-TSBlondel, Cacciani, et al., 1989gas phase; reported: 27129.170±0.015 cm-1; B
Δr1331. ± 8.4kJ/molIMRETaft and Bordwell, 1988gas phase; B
Δr1319.6kJ/molN/ACheck, Faust, et al., 2001gas phase; F-; ; ΔS(acid)=19.2; ΔS(EA)=6.4; B

Ion clustering 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:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.

Clustering reactions

Bromine anion + Hydrogen bromide = (Bromine anion • Hydrogen bromide)

By formula: Br- + HBr = (Br- • HBr)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Δr86.2 ± 8.4kJ/molTDAsCaldwell and Kebarle, 1985gas phase; B,M
Δr73.2kJ/molFADavidson, Fehsenfeld, et al., 1977gas phase; From thermochemical cycle,switching reaction(Br-/NO3-HNO3/HBr); DG>, ΔrH>; M
Quantity Value Units Method Reference Comment
Δr93.3J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; M
Δr92.J/mol*KFADavidson, Fehsenfeld, et al., 1977gas phase; From thermochemical cycle,switching reaction(Br-/NO3-HNO3/HBr); DG>, ΔrH>; M
Quantity Value Units Method Reference Comment
Δr58. ± 11.kJ/molTDAsCaldwell and Kebarle, 1985gas phase; B

Free energy of reaction

ΔrG° (kJ/mol) T (K) Method Reference Comment
39.367.FADavidson, Fehsenfeld, et al., 1977gas phase; From thermochemical cycle,switching reaction(Br-/NO3-HNO3/HBr); DG>, ΔrH>; M

(Bromine anion • Hydrogen bromide) + Hydrogen bromide = (Bromine anion • 2Hydrogen bromide)

By formula: (Br- • HBr) + HBr = (Br- • 2HBr)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Δr46.0kJ/molPHPMSCaldwell and Kebarle, 1985gas phase; M
Quantity Value Units Method Reference Comment
Δr71.1J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; M

(Bromine anion • Sulfur dioxide) + Hydrogen bromide = (Bromine anion • Hydrogen bromide • Sulfur dioxide)

By formula: (Br- • O2S) + HBr = (Br- • HBr • O2S)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Δr51.0kJ/molPHPMSCaldwell and Kebarle, 1985gas phase; From thermochemical cycle,switching reaction(Br- HBr)SO2; M
Quantity Value Units Method Reference Comment
Δr80.3J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; From thermochemical cycle,switching reaction(Br- HBr)SO2; M

Methyl cation + Hydrogen bromide = (Methyl cation • Hydrogen bromide)

By formula: CH3+ + HBr = (CH3+ • HBr)

Quantity Value Units Method Reference Comment
Δr232.kJ/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 202. kJ/mol; Foster, Williamson, et al., 1974; M

HBr+ + Hydrogen bromide = (HBr+ • Hydrogen bromide)

By formula: HBr+ + HBr = (HBr+ • HBr)

Quantity Value Units Method Reference Comment
Δr96.kJ/molPITiedemann, Anderson, et al., 1979gas phase; M

Iodide + Hydrogen bromide = (Iodide • Hydrogen bromide)

By formula: I- + HBr = (I- • HBr)

Bond type: Hydrogen bond (negative ion to hydride)

Quantity Value Units Method Reference Comment
Δr67.4 ± 8.4kJ/molTDEqCaldwell and Kebarle, 1985gas phase; B,M
Quantity Value Units Method Reference Comment
Δr82.0J/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; switching reaction(I-)SO2; M
Quantity Value Units Method Reference Comment
Δr43. ± 11.kJ/molTDEqCaldwell and Kebarle, 1985gas phase; B

Free energy of reaction

ΔrG° (kJ/mol) T (K) Method Reference Comment
42.7300.PHPMSCaldwell and Kebarle, 1985gas phase; switching reaction(I-)SO2; M

NO3 anion + Hydrogen bromide = (NO3 anion • Hydrogen bromide)

By formula: NO3- + HBr = (NO3- • HBr)

Quantity Value Units Method Reference Comment
Δr96.J/mol*KN/ADavidson, Fehsenfeld, et al., 1977gas phase; switching reaction(NO3-)HNO3, Entropy change calculated or estimated, DG<, ΔrH<; M
Quantity Value Units Method Reference Comment
Δr73. ± 16.kJ/molTDEqDavidson, Fehsenfeld, et al., 1977gas phase; Anchored to HBr..Br- in Caldwell and Kebarle, 1985.; B

Free energy of reaction

ΔrG° (kJ/mol) T (K) Method Reference Comment
53.1367.FADavidson, Fehsenfeld, et al., 1977gas phase; switching reaction(NO3-)HNO3, Entropy change calculated or estimated, DG<, ΔrH<; M

(NO3 anion • Nitric acid) + Hydrogen bromide = (NO3 anion • Hydrogen bromide • Nitric acid)

By formula: (NO3- • HNO3) + HBr = (NO3- • HBr • HNO3)

Quantity Value Units Method Reference Comment
Δr66.9kJ/molFADavidson, Fehsenfeld, et al., 1977gas phase; switching reaction(NO3-)2HNO3; M
Quantity Value Units Method Reference Comment
Δr95.8J/mol*KFADavidson, Fehsenfeld, et al., 1977gas phase; switching reaction(NO3-)2HNO3; M
Quantity Value Units Method Reference Comment
Δr38.kJ/molFADavidson, Fehsenfeld, et al., 1977gas phase; switching reaction(NO3-)2HNO3; M

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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IR 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

View scan of original (hardcopy) spectrum.

View image of digitized spectrum (can be printed in landscape orientation).

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Download spectrum in JCAMP-DX format.

Owner COBLENTZ SOCIETY
Collection (C) 2018 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin DOW CHEMICAL COMPANY
Source reference COBLENTZ NO. 8757
Date 1964
State GAS (600 mmHg DILUTED TO A TOTAL PRESSURE OF 600 mmHg WITH N2)
Instrument DOW KBr FOREPRISM
Instrument parameters GRATING CHANGED AT 5.0, 7.5, 15.0 MICRON
Path length 5 CM
Resolution 4
Sampling procedure TRANSMISSION
Data processing DIGITIZED BY NIST FROM HARD COPY (FROM TWO SEGMENTS)

This IR spectrum is from the Coblentz Society's evaluated infrared reference spectra collection.


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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Mass spectrum
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Additional Data

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Due to licensing restrictions, this spectrum cannot be downloaded.

Owner NIST Mass Spectrometry Data Center
Collection (C) 2014 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin Chemical Concepts
NIST MS number 157480

All mass spectra in this site (plus many more) are available from the NIST/EPA/NIH Mass Spectral Library. Please see the following for information about the library and its accompanying search program.


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

Symbols used in the table of constants
SymbolMeaning
State electronic state and / or symmetry symbol
Te minimum electronic energy (cm-1)
ωe vibrational constant – first term (cm-1)
ωexe vibrational constant – second term (cm-1)
ωeye vibrational constant – third term (cm-1)
Be rotational constant in equilibrium position (cm-1)
αe rotational constant – first term (cm-1)
γe rotation-vibration interaction constant (cm-1)
De centrifugal distortion constant (cm-1)
βe rotational constant – first term, centrifugal force (cm-1)
re internuclear distance (Å)
Trans. observed transition(s) corresponding to electronic state
ν00 position of 0-0 band (units noted in table)
Diatomic constants for H81Br
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
Numerous absorption bands above 11400 cm-1, tentatively assigned to higher members of two Rydberg series starting with L and M and converging to A 2Σ+ of Hbr+; I.P.[A 2Σ+, v=0]=123373 cm-1 (15.2964 eV).
M (1Σ+) (109473) [1308] 1         M ← X 108814
missing citation
L (1Σ+, 1Π) (104201) [1262] 2         L ← X 103519
missing citation
3           
Barrow and Stamper, 1961; Stamper, 1962
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
K 6 1 (83902) (2518) 4   [8.195]   [22.0E-4]  [1.4375] K ← X R 83847.9 5 Z
Stamper, 1962
J 6 1 (81243) (2502) 4   [8.027] 7   [3.61E-4]  [1.453] J ← X R 81180.7 8 Z
missing citation
I 6 1 80436 (2525) 4   [8.169] 9   [10.4E-4]  [1.440] I ← X R 80385.6 10 Z
missing citation
g (3Σ-)0+ (79253.2) 11    [7.63] 12   -17E-4  [1.49] g ← X R 77940.0 Z
missing citation; missing citation
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
F 1Δ (78322.3) 11    [8.20]     [1.437] F ← X R 77009.1 Z
missing citation
f1 3Δ1 (76814) 11 [2299.7] Z   8.027 0.213    1.453 f1 ← X R 76650.9 Z
Barrow and Stamper, 1961; missing citation
D 1Π (76310) 13 [2405.5] Z   8.125 0.21    1.444 D ← X R 76199.4 Z
missing citation; missing citation
d0 3Π0 (76193) [2418.5] Z   [7.624] 14 (0.32)    [1.4904] d0 ← X R 76088.8 Z
Barrow and Stamper, 1961; missing citation
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
E (3Σ+)0+ (76691) 11    [7.34] 15     [1.519] E ← X R 75378
Ginter and Tilford, 1971
V 1Σ+ (75800) 16 (790) 17         V ↔ X 18 R (74900)
Stamper and Barrow, 1961; missing citation
f2 3Δ2 [75533.8] 11    [8.675] 19   [16.5E-4] 19  [1.397] 5 f2 ← X R 74220.6 Z
Barrow and Stamper, 1961; missing citation
f3 3Δ3 [75403.1] 11 20    [7.41]   [-7.6E-4]  [1.512] 5 f3 ← X R 74089.9 Z
missing citation
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
e 3Σ+ [75053] 11 21          e ← X R 73740
Ginter and Tilford, 1971
d1 3Π1 [74855] 13 22          d1 ← X R 73542
Barrow and Stamper, 1961; Ginter and Tilford, 1971
d2 3Π2 [74753] 13 22          d2 ← X R 73440
Barrow and Stamper, 1961; Ginter and Tilford, 1971
C 1Π 70578 23 2552 Z 52  7.89 0.30    1.465 C ← X 24 R 70527.6 Z
Barrow and Stamper, 1961; missing citation
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
b0 3Π0 0+ (68998) 23 [2452]   [7.996] 25     [1.455] b0 ← X R 68911.2 Z
Barrow and Stamper, 1961; missing citation
b0 3Π0 0-           b0 ← X R 68904 26 H
Barrow and Stamper, 1961; missing citation
b1 3Π1 (67180) 23 [2444.2] Z   8.148 25 0.292    1.442 b1 ← X R 67088.4 Z
missing citation; missing citation
b2 3Π2 [67663.0] 23    [7.805] 25     [1.473] b2 ← X R 66349.8 Z
Barrow and Stamper, 1961; missing citation
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
A (1Π) 28 27          A ← X 
Bates, Halford, et al., 1935; Goodeve and Taylor, 1935; Datta and Chakravarty, 1941; Romand, 1949; Huebert and Martin, 1968
X 1Σ+ 0 2648.975 29 Z 45.2175 30 -0.0029 8.464884 X 0.23328 31  3.4575E-4 32  1.414435 33  
Rank, Fink, et al., 1965
Rotation spectrum 34 35
Hansler and Oetjen, 1953; Jones and Gordy, 1964; Van Dijk and Dymanus, 1969
Raman sp. 36
Cherlow, Hyatt, et al., 1975
Mol. beam el. reson. 37
Dabbousi, Meerts, et al., 1973

Notes

1v=0...4 observed. Assigned as 4pσ4pπ4 6sσ. 40
2v=0...3 observed. Assigned as 4pσ4pπ4 5pσ and/or 5pπ. 40
3Further absorption bands of doubtful assignment between 75200 and 83600 cm-1.
4From the observed HBr-DBr isotope shift assuming that the observed bands are 0-0 bands.
5Band [37] of Stamper, 1962.
6I, J, K correspond to absorption bands with clear analogues in DBr.
7Ω-type doubling, Δνef = +0.142J(J+1)- ...; B and D represent average values.
8Band [28] of Barrow and Stamper, 1961. Sharp P, Q, R branches; the Q levels appear to be predissociated for J«gte»14.
9missing note
10Band [26] of Barrow and Stamper, 1961.
11Configuration ... σ2π3 5pπ.
12Perturbed at high J.
13Configuration ... σ2π3 5pσ.
14Slightly diffuse lines.
15Perturbed.
16Derived from H+ + Br-; configuration ... σπ4σ*.
17Bands in emission above 46500 cm-1, in absorption above 75700. Incomplete analysis.
18Heavily perturbed extensive band system. Absorption lines above 75923 cm-1 are diffuse. B' varies irregularly between 3.4 and 4.5 cm-1.
19Average values for the two Ω-type doubling components.
20Weak transition.
21Very diffuse, unresolved band.
22Diffuse band, rotational structure unresolved.
23Configuration ... σ2π3 5sσ.
24Very strong absorption, lines are diffuse.
25Diffuse rotational structure.
26Diffuse Q head.
27Continous absorption statring at ~35000 with maximum at 56400 cm-1.
28Configuration ... σ2π3 σ*.
29These are Y10 and Y01 values; applying Dunham corrections Rank, Fink, et al., 1965 obtain we = 2649.215, Be = 8.465065. Additional corrections (adiabatic, non-adiabatic) are discussed by Bunker, 1972. The microwave B0 values of Jones and Gordy, 1964 was included in the evaluation of Be. See also 42 37
30missing note
31+0.0008735(v+1/2)2 - 0.000120(v+1/2)3.
32-0.0397E-4(v+1/2) + 0.0038(v+1/2)2; Hv = 7.63E-9 - 0.55E-9(v+1/2).
33Rot.-vibr. Sp. 42 35
34Absolute intensities have been measured by Chamberlain and Gebbie, 1965.
35For observations and measurements of pressure-induced bands and pure rotation lines (ΔJ=2) see Atwood, Vu, et al., 1967, Weiss and Cole, 1967. The pressure broadening of the lines has been studied by Babrov, 1964, Pourcin, Bachet, et al., 1967.
36Raman cross sections in gaseous HBr.
37The following constants (as well as corresponding values for H79Br) are given in Dabbousi, Meerts, et al., 1973: -μel(v=0,J=1) = 0.8265 D [in a later paper van Dijk and Dymanus, 1974 derive 0.8282 D from Stark effect of rotation spectrum]; -quadrupole and other hyperfine coupling constants; -gJ = 0.3712. These constants supersede earlier values of Schurin and Rollefson, 1957, Jones and Gordy, 1964, Tokuhiro, 1967, Van Dijk and Dymanus, 1969, van Dijk and Dymanus, 1970.
38From D00(H2), D00(Br2), and ΔHf0 (HBr;from gaseous H2,Br2).
39Average value from photoionization Watanabe, 1957 and photoelectron spectra Frost, McDowell, et al., 1967, Lempka, Passmore, et al., 1968; refers to X 2Π3/2 of the ion. A more recent paper Delwiche, Natalis, et al., 1972 gives 11.645 eV.
40Strongly broadened by preionization; estimated lifetime against preionization 9.5E-15 s Terwilliger and Smith, 1975.
41From R, P branches. Δνef = -0.04lJ(J+1).
42In absorption the 1-0, 2-0, 3-0, 3-1, 4-0, 5-0, 6-0 bands have been studied Naude and Verleger, 1950, Thompson, Williams, et al., 1952, Plyler, 1960, Rank, Fink, et al., 1965, Bernage, Niay, et al., 1973; in emission 1-0, 2-1, 3-2, 4-3 Mould, Price, et al., 1960, James and Thibault, 1965. The constants in the table are from Rank, Fink, et al., 1965, those of James and Thibault, 1965, Bernage, Niay, et al., 1973 are very similar and of comparable accuracy. See also Ogilvie and Koo, 1976. Absolute intensities have been measured Babrov, 1964, Babrov, Shabott, et al., 1965, Rao and Lindquist, 1968, Gustafson and Rao, 1970 and the dipole moment function has been calculated; Urquhart, Clark, et al., 1972 give for H79Br[D, ]: μel(r) = +0.788 + 0.315(r-re) + 0.575(r-re)2; see also Jacobi, 1967, Tipping and Herman, 1970, Rao, 1971.

References

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering 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]

Caldwell and Kebarle, 1985
Caldwell, G.; Kebarle, P., The hydrogen bond energies of the bihalide ions XHX- and YHX-, Can. J. Chem., 1985, 63, 1399. [all data]

Davidson, Fehsenfeld, et al., 1977
Davidson, J.A.; Fehsenfeld, F.C.; Howard, C.J., The heats of formation of NO3- and NO3- association complexes with HNO3 and HBr, Int. J. Chem. Kinet., 1977, 9, 17. [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
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Check, Faust, et al., 2001
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Notes

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