Hydrogen bromide

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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

References

Go To: Top, Ion clustering data, Notes

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

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]

McMahon, Heinis, et al., 1988
McMahon, T.; Heinis, T.; Nicol, G.; Hovey, J.K.; Kebarle, P., Methyl Cation Affinities, J. Am. Chem. Soc., 1988, 110, 23, 7591, https://doi.org/10.1021/ja00231a002 . [all data]

Foster, Williamson, et al., 1974
Foster, M.S.; Williamson, A.D.; Beauchamp, J.L., Photoionization mass spectrometry of trans-azomethane, Int. J. Mass Spectrom. Ion Phys., 1974, 15, 429. [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]


Notes

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