Hydrogen bromide

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Gas phase thermochemistry data

Go To: Top, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, 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
ΔfH°gas-8.674 ± 0.038kcal/molReviewCox, Wagman, et al., 1984CODATA Review value
ΔfH°gas-8.709kcal/molReviewChase, 1998Data last reviewed in September, 1965
Quantity Value Units Method Reference Comment
S°gas,1 bar47.4904 ± 0.001cal/mol*KReviewCox, Wagman, et al., 1984CODATA Review value
S°gas,1 bar47.490cal/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 (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 1100.1100. to 6000.
A 7.5798507.860691
B -3.2743600.674502
C 5.582140-0.114253
D -2.1530910.007759
E -0.006873-0.758833
F -10.89260-12.53900
G 57.3716155.17679
H -8.710101-8.710101
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, Gas phase ion energetics data, Ion clustering data, 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 (atm)
    T = temperature (K)

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Temperature (K) A B C Reference Comment
134.3 to 206.74.01848695.466-33.542Stull, 1947Coefficents calculated by NIST from author's data.
206.7 to 343.84.15014754.969-25.086Stull, 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, Gas phase ion energetics data, Ion clustering data, 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
ΔrH°20.6 ± 2.0kcal/molTDAsCaldwell and Kebarle, 1985gas phase; B,M
ΔrH°17.5kcal/molFADavidson, Fehsenfeld, et al., 1977gas phase; From thermochemical cycle,switching reaction(Br-/NO3-HNO3/HBr); DG>, ΔrH>; M
Quantity Value Units Method Reference Comment
ΔrS°22.3cal/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; M
ΔrS°22.cal/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
ΔrG°13.9 ± 2.6kcal/molTDAsCaldwell and Kebarle, 1985gas phase; B

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
9.4367.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
ΔrH°323.540 ± 0.050kcal/molD-EABlondel, Cacciani, et al., 1989gas phase; reported: 27129.170±0.015 cm-1; B
ΔrH°323.4 ± 2.1kcal/molG+TSTaft and Bordwell, 1988gas phase; B
ΔrH°320.60kcal/molN/ACheck, Faust, et al., 2001gas phase; F-; ; ΔS(acid)=19.2; ΔS(EA)=6.4; B
Quantity Value Units Method Reference Comment
ΔrG°318.30 ± 0.15kcal/molH-TSBlondel, Cacciani, et al., 1989gas phase; reported: 27129.170±0.015 cm-1; B
ΔrG°318.2 ± 2.0kcal/molIMRETaft and Bordwell, 1988gas phase; B
ΔrG°315.40kcal/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
ΔrH°-35.8 ± 2.8kcal/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), -60.7 ± 2.0 kcal/mol, and Mo(Cp)(CO)3(Br)(cr) + Br2(solution) = Mo(Cp)(CO)2(Br)3(solution) + CO(solution), -24.9 ± 2.0 kcal/mol; MS

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

By formula: NO3- + HBr = (NO3- • HBr)

Quantity Value Units Method Reference Comment
ΔrS°23.cal/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
ΔrG°17.4 ± 3.9kcal/molTDEqDavidson, Fehsenfeld, et al., 1977gas phase; Anchored to HBr..Br- in Caldwell and Kebarle, 1985.; B

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
12.7367.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
ΔrH°16.1 ± 2.0kcal/molTDEqCaldwell and Kebarle, 1985gas phase; B,M
Quantity Value Units Method Reference Comment
ΔrS°19.6cal/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; switching reaction(I-)SO2; M
Quantity Value Units Method Reference Comment
ΔrG°10.2 ± 2.6kcal/molTDEqCaldwell and Kebarle, 1985gas phase; B

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
10.2300.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
ΔrH°-20.43kcal/molCmLacher, Kianpour, et al., 1957gas phase; ALS
ΔrH°-20.050kcal/molCmLacher, Lea, et al., 1950gas phase; Heat of hydrobromination at 367°K; ALS
ΔrH°-20.10 ± 0.14kcal/molCmLacher, Walden, et al., 1950gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -20.17 ± 0.24 kcal/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
ΔrH°12.2kcal/molPHPMSCaldwell and Kebarle, 1985gas phase; From thermochemical cycle,switching reaction(Br- HBr)SO2; M
Quantity Value Units Method Reference Comment
ΔrS°19.2cal/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
ΔrH°16.0kcal/molFADavidson, Fehsenfeld, et al., 1977gas phase; switching reaction(NO3-)2HNO3; M
Quantity Value Units Method Reference Comment
ΔrS°22.9cal/mol*KFADavidson, Fehsenfeld, et al., 1977gas phase; switching reaction(NO3-)2HNO3; M
Quantity Value Units Method Reference Comment
ΔrG°9.2kcal/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
ΔrH°-65.61 ± 0.53kcal/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
ΔrH°11.0kcal/molPHPMSCaldwell and Kebarle, 1985gas phase; M
Quantity Value Units Method Reference Comment
ΔrS°17.0cal/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
ΔrH°-62.22 ± 0.11kcal/molCmHoward and Skinner, 1966solid phase; solvent: Aqueous solution; Reanalyzed by Pedley, Naylor, et al., 1986, Original value = -62.55 ± 0.11 kcal/mol; ALS

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

By formula: CH3+ + HBr = (CH3+ • HBr)

Quantity Value Units Method Reference Comment
ΔrH°55.4kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/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
ΔrH°-89.39 ± 0.48kcal/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
ΔrH°-75.84 ± 0.48kcal/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
ΔrH°-82.62 ± 0.48kcal/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
ΔrH°-84.30 ± 0.48kcal/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
ΔrH°16.0 ± 2.0kcal/molTDEqDavidson, Fehsenfeld, et al., 1977gas phase; B
Quantity Value Units Method Reference Comment
ΔrG°9.6 ± 2.8kcal/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
ΔrH°-18.42 ± 0.12kcal/molCmLacher, Billings, et al., 1952gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -18.3 ± 1.6 kcal/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
ΔrH°-17.26 ± 0.12kcal/molCmLacher, Billings, et al., 1952gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -17.3 ± 1.4 kcal/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
ΔrH°-20.04 ± 0.12kcal/molCmLacher, Billings, et al., 1952gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -20.1 ± 1.8 kcal/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
ΔrH°-25.77 ± 0.32kcal/molCmLacher, Kianpour, et al., 1957gas phase; ALS
ΔrH°-22.69 ± 0.16kcal/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
ΔrH°10.9kcal/molPHPMSCaldwell and Kebarle, 1985gas phase; M
Quantity Value Units Method Reference Comment
ΔrS°18.9cal/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
ΔrH°-23.31kcal/molCmDevore and O'Neal, 1969liquid phase; Heat of hydrolysis; ALS
ΔrH°-23.06kcal/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
ΔrH°-10.85 ± 0.22kcal/molChydDavies, Lacher, et al., 1965gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = -10.77 kcal/mol; ALS

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

By formula: HBr + C7H7Br = C7H8 + Br2

Quantity Value Units Method Reference Comment
ΔrH°8.1 ± 1.0kcal/molEqkBenson and Buss, 1957gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = 8.0 ± 0.9 kcal/mol; ALS

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

By formula: C3H6Br2 = HBr + C3H5Br

Quantity Value Units Method Reference Comment
ΔrH°15.5kcal/molEqkLevanova, Rodova, et al., 1983liquid phase; Flow reactor; ALS
ΔrH°16.7 ± 0.2kcal/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
ΔrH°-1517.74 ± 0.24kcal/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
ΔrH°19.20 ± 0.50kcal/molEqkLane, Linnett, et al., 1953gas phase; Reanalyzed by Cox and Pilcher, 1970, Original value = 19.1 kcal/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
ΔrH°-60.7 ± 2.0kcal/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
ΔrH°-15.8 ± 0.69kcal/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
ΔrH°-41.0 ± 0.2kcal/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
ΔrH°-40.7 ± 0.2kcal/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
ΔrH°7.4 ± 2.0kcal/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
ΔrH°-32.92 ± 0.18kcal/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
ΔrH°-38.6 ± 0.2kcal/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
ΔrH°-26.07 ± 0.23kcal/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
ΔrH°-49.06 ± 0.16kcal/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
ΔrH°19.9 ± 0.2kcal/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
ΔrH°-70.29 ± 0.53kcal/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
ΔrH°-69.91 ± 0.53kcal/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
ΔrH°-73.11 ± 0.53kcal/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
ΔrH°-73.21 ± 0.53kcal/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
ΔrH°-55.21 ± 0.53kcal/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
ΔrH°-3.7kcal/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
ΔrH°-1.9kcal/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
ΔrH°-73.11 ± 0.53kcal/molRSCHolm, 1981solvent: Diethyl ether; MS

Benzoyl bromide + Water = Hydrogen bromide + Benzoic acid

By formula: C7H5BrO + H2O = HBr + C7H6O2

Quantity Value Units Method Reference Comment
ΔrH°-27.04kcal/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
ΔrH°-71.51 ± 0.53kcal/molRSCHolm, 1981solvent: Diethyl ether; MS

Benzyltrimethylammonium bromide = Hydrogen bromide + C10H15N

By formula: C10H16N.Br = HBr + C10H15N

Quantity Value Units Method Reference Comment
ΔrH°-21.0 ± 0.9kcal/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
ΔrH°-15.2 ± 1.3kcal/molCmNesterova, Kovzel, et al., 1977liquid phase; Hydrobromination; ALS

Gas phase ion energetics data

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Ion clustering data, 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 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)139.6kcal/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity133.3kcal/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
ΔrH°323.540 ± 0.050kcal/molD-EABlondel, Cacciani, et al., 1989gas phase; reported: 27129.170±0.015 cm-1; B
ΔrH°323.4 ± 2.1kcal/molG+TSTaft and Bordwell, 1988gas phase; B
ΔrH°320.60kcal/molN/ACheck, Faust, et al., 2001gas phase; F-; ; ΔS(acid)=19.2; ΔS(EA)=6.4; B
Quantity Value Units Method Reference Comment
ΔrG°318.30 ± 0.15kcal/molH-TSBlondel, Cacciani, et al., 1989gas phase; reported: 27129.170±0.015 cm-1; B
ΔrG°318.2 ± 2.0kcal/molIMRETaft and Bordwell, 1988gas phase; B
ΔrG°315.40kcal/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
ΔrH°20.6 ± 2.0kcal/molTDAsCaldwell and Kebarle, 1985gas phase; B,M
ΔrH°17.5kcal/molFADavidson, Fehsenfeld, et al., 1977gas phase; From thermochemical cycle,switching reaction(Br-/NO3-HNO3/HBr); DG>, ΔrH>; M
Quantity Value Units Method Reference Comment
ΔrS°22.3cal/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; M
ΔrS°22.cal/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
ΔrG°13.9 ± 2.6kcal/molTDAsCaldwell and Kebarle, 1985gas phase; B

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
9.4367.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
ΔrH°11.0kcal/molPHPMSCaldwell and Kebarle, 1985gas phase; M
Quantity Value Units Method Reference Comment
ΔrS°17.0cal/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
ΔrH°12.2kcal/molPHPMSCaldwell and Kebarle, 1985gas phase; From thermochemical cycle,switching reaction(Br- HBr)SO2; M
Quantity Value Units Method Reference Comment
ΔrS°19.2cal/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
ΔrH°55.4kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/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
ΔrH°23.kcal/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
ΔrH°16.1 ± 2.0kcal/molTDEqCaldwell and Kebarle, 1985gas phase; B,M
Quantity Value Units Method Reference Comment
ΔrS°19.6cal/mol*KPHPMSCaldwell and Kebarle, 1985gas phase; switching reaction(I-)SO2; M
Quantity Value Units Method Reference Comment
ΔrG°10.2 ± 2.6kcal/molTDEqCaldwell and Kebarle, 1985gas phase; B

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
10.2300.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
ΔrS°23.cal/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
ΔrG°17.4 ± 3.9kcal/molTDEqDavidson, Fehsenfeld, et al., 1977gas phase; Anchored to HBr..Br- in Caldwell and Kebarle, 1985.; B

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
12.7367.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
ΔrH°16.0kcal/molFADavidson, Fehsenfeld, et al., 1977gas phase; switching reaction(NO3-)2HNO3; M
Quantity Value Units Method Reference Comment
ΔrS°22.9cal/mol*KFADavidson, Fehsenfeld, et al., 1977gas phase; switching reaction(NO3-)2HNO3; M
Quantity Value Units Method Reference Comment
ΔrG°9.2kcal/molFADavidson, Fehsenfeld, et al., 1977gas phase; switching reaction(NO3-)2HNO3; M

Mass spectrum (electron ionization)

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, 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 by: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

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Additional Data

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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

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Constants of diatomic molecules

Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, Mass spectrum (electron ionization), References, Notes

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, Gas phase ion energetics data, Ion clustering data, 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
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]

Nolan, López de la Vega, et al., 1986
Nolan, S.P.; López de la Vega, R.; Hoff, C.D., J. Organometal. Chem., 1986, 315, 187. [all data]

Lacher, Kianpour, et al., 1957
Lacher, J.R.; Kianpour, A.; Park, J.D., Reaction heats of organic halogen compounds. X. Vapor phase heats of hydrobromination of cyclopropane and propylene, J. Phys. Chem., 1957, 61, 1124-1125. [all data]

Lacher, Lea, et al., 1950
Lacher, J.R.; Lea, K.R.; Walden, C.H.; Olson, G.G.; Park, J.D., Reaction heats of organic fluorine compounds. III. The vapor phase heats of hydrobromination of some simple fluoroolefins, J. Am. Chem. Soc., 1950, 72, 3231-3234. [all data]

Lacher, Walden, et al., 1950
Lacher, J.R.; Walden, C.H.; Lea, K.R.; Park, J.D., Vapor phase heats of hydrobromination of cyclopropane and propylene, J. Am. Chem. Soc., 1950, 72, 331-333. [all data]

Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]

Holm, 1981
Holm, T., J. Chem. Soc., Perkin Trans. II, 1981, 464.. [all data]

Pedley, 1994
Pedley, J.B., Thermodynamic Data and Structures of Organic Compounds; Thermodynamics Research Center Data Series, Vol I, Thermodynamics Research Center, College Station, 1994. [all data]

Howard and Skinner, 1966
Howard, P.B.; Skinner, H.A., Thermochemistry of some reactions of aqueous hydrazine with halogens, hydrogen halides and N-halogenosuccinimides, J. Chem. Soc. A, 1966, 1536-1540. [all data]

Pedley, Naylor, et al., 1986
Pedley, J.B.; Naylor, R.D.; Kirby, S.P., Thermochemical Data of Organic Compounds, Chapman and Hall, New York, 1986, 1-792. [all data]

McMahon, Heinis, et al., 1988
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Notes

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