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Benzene, bromo-

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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
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
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 C6H5Br+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
IE (evaluated)9.00 ± 0.03eVN/AN/AL
Quantity Value Units Method Reference Comment
Proton affinity (review)754.1kJ/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity725.8kJ/molN/AHunter and Lias, 1998HL

Ionization energy determinations

IE (eV) Method Reference Comment
9.00PEFujisawa, Ohno, et al., 1986LBLHLM
8.998PEVon Niessen, Asbrink, et al., 1982LBLHLM
9.02PEKimura, Katsumata, et al., 1981LLK
9.05 ± 0.02PEMohraz, Maier, et al., 1980LLK
8.98 ± 0.02EQLias and Ausloos, 1978LLK
8.98PEBehan, Johnstone, et al., 1976LLK
9.45EIBaldwin, Loudon, et al., 1976LLK
8.97 ± 0.02PIPECOBaer, Tsai, et al., 1976LLK
8.99PESergeev, Akopyan, et al., 1970RDSH
9.03 ± 0.01PISergeev, Akopyan, et al., 1970RDSH
8.98 ± 0.03EIJohnstone, Mellon, et al., 1970RDSH
8.950PIMomigny, Goffart, et al., 1968RDSH
8.98 ± 0.02PIWatanabe, 1957RDSH
8.99PEKlasinc, Kovac, et al., 1983Vertical value; LBLHLM
9.041PEPotts, Lyus, et al., 1980Vertical value; LLK
9.05PESell and Kupperman, 1978Vertical value; LLK
8.99 ± 0.03PECvitas and Klasinc, 1977Vertical value; LLK
9.00PEStreets and Ceasar, 1973Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
C4H4+16.8 ± 0.1?EIMomigny, 1959RDSH
C6H4+14.2 ± 0.2HBrEIMomigny, 1959RDSH
C6H5+11.74 ± 0.07BrPIMalinovich, Arakawa, et al., 1985LBLHLM
C6H5+11.79 ± 0.09BrPIDunbar and Honovich, 1984LBLHLM
C6H5+12.04 ± 0.05BrEIBurgers and Holmes, 1984LBLHLM
C6H5+12.2 ± 0.1BrEIBurgers and Holmes, 1982LBLHLM
C6H5+11.7 ± 0.4BrPIPECORosenstock, Stockbauer, et al., 1980LLK
C6H5+12.10BrPIPECOBaer, Tsai, et al., 1976LLK
C6H5+11.82BrEIJohnstone and Mellon, 1972LLK
C6H5+11.75 ± 0.05BrPISergeev, Akopyan, et al., 1970RDSH
C6H5+12.02BrEIHowe and Williams, 1969RDSH

De-protonation reactions

C6H4Br- + Hydrogen cation = Benzene, bromo-

By formula: C6H4Br- + H+ = C6H5Br

Quantity Value Units Method Reference Comment
Deltar1620. ± 10.kJ/molBranWenthold and Squires, 1995gas phase; By HO- cleavage of substituted silanes; B
Deltar1607. ± 8.8kJ/molG+TSLinnert and Riveros, 1994gas phase; Acidity between quinoline and benzonitrile; B
Quantity Value Units Method Reference Comment
Deltar1586. ± 11.kJ/molH-TSWenthold and Squires, 1995gas phase; By HO- cleavage of substituted silanes; B
Deltar1572. ± 8.4kJ/molIMRBLinnert and Riveros, 1994gas phase; Acidity between quinoline and benzonitrile; B

C6H4Br- + Hydrogen cation = Benzene, bromo-

By formula: C6H4Br- + H+ = C6H5Br

Quantity Value Units Method Reference Comment
Deltar1605. ± 8.8kJ/molBranWenthold and Squires, 1995gas phase; By HO- cleavage of substituted silanes; B
Quantity Value Units Method Reference Comment
Deltar1570. ± 9.2kJ/molH-TSWenthold and Squires, 1995gas phase; By HO- cleavage of substituted silanes; B

C6H4Br- + Hydrogen cation = Benzene, bromo-

By formula: C6H4Br- + H+ = C6H5Br

Quantity Value Units Method Reference Comment
Deltar1643. ± 8.4kJ/molBranWenthold and Squires, 1995gas phase; By HO- cleavage of substituted silanes; B
Quantity Value Units Method Reference Comment
Deltar1611. ± 8.8kJ/molH-TSWenthold and Squires, 1995gas phase; By HO- cleavage of substituted silanes; B

References

Go To: Top, Gas phase ion energetics data, Notes

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

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]

Fujisawa, Ohno, et al., 1986
Fujisawa, S.; Ohno, K.; Masuda, S.; Harada, Y., Penning ionization electron spectroscopy of monohalogenobenzenes: C6H5F, C6H5Cl, C6H5Br, and C6H5I, J. Am. Chem. Soc., 1986, 108, 6505. [all data]

Von Niessen, Asbrink, et al., 1982
Von Niessen, W.; Asbrink, L.; Bieri, G., 30.4 nm He(II) Photoelectron spectra of organic molecules. Part VI. Halogeno-compounds (C,H,X: X = Cl, Br, I), J. Electron Spectrosc. Relat. Phenom., 1982, 26, 173. [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]

Mohraz, Maier, et al., 1980
Mohraz, M.; Maier, J.P.; Heilbronner, E., He(I «alpha») and He(I«alpha») photoelectron spectra of fluorinated chloro- and bromobenzenes, J. Electron Spectrosc. Relat. Phenom., 1980, 19, 429. [all data]

Lias and Ausloos, 1978
Lias, S.G.; Ausloos, P.J., eIonization energies of organic compounds by equilibrium measurements, J. Am. Chem. Soc., 1978, 100, 6027. [all data]

Behan, Johnstone, et al., 1976
Behan, J.M.; Johnstone, R.A.W.; Bentley, T.W., An evaluation of empirical methods for calculating the ionization potentials of substituted benzenes, Org. Mass Spectrom., 1976, 11, 207. [all data]

Baldwin, Loudon, et al., 1976
Baldwin, M.A.; Loudon, A.G.; Maccoll, A.; Webb, K.S., The nature and fragmentation pathways of the molecular ions of some arylureas, arylthioureas, acetanilides, thioacetanilides and related compounds, Org. Mass Spectrom., 1976, 11, 1181. [all data]

Baer, Tsai, et al., 1976
Baer, T.; Tsai, B.P.; Smith, D.; Murray, P.T., Absolute unimolecular decay rates of energy selected metastable halobenzene ions, J. Chem. Phys., 1976, 64, 2460. [all data]

Sergeev, Akopyan, et al., 1970
Sergeev, Yu.L.; Akopyan, M.E.; Vilesov, F.I.; Kleimenov, V.I., Photoionization processes in phenyl halides, Opt. i Spektroskopiya, 1970, 29, 119, In original 63. [all data]

Johnstone, Mellon, et al., 1970
Johnstone, R.A.W.; Mellon, F.A.; Ward, S.D., Online acquisition of ionization efficiency data, Intern. J. Mass Spectrom. Ion Phys., 1970, 5, 241. [all data]

Momigny, Goffart, et al., 1968
Momigny, J.; Goffart, C.; D'Or, L., Photoionization studies by total ionization measurements. I. Benzene and its monohalogeno derivatives, Intern. J. Mass Spectrom. Ion Phys., 1968, 1, 53. [all data]

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

Klasinc, Kovac, et al., 1983
Klasinc, L.; Kovac, B.; Gusten, H., Photoelectron spectra of acenes. Electronic structure and substituent effects, Pure Appl. Chem., 1983, 55, 289. [all data]

Potts, Lyus, et al., 1980
Potts, A.W.; Lyus, M.L.; Lee, E.P.F.; Fattahallah, G.H., High resolution ultraviolet photoelectron spectra of C6H5X and p-C6H4X2 where X = Cl, Br or I, J. Chem. Soc. Faraday Trans. 2, 1980, 76, 556. [all data]

Sell and Kupperman, 1978
Sell, J.A.; Kupperman, A., Angular distributions in the photoelectron spectra of benzene and its monohalogenated derivatives, Chem. Phys., 1978, 33, 367. [all data]

Cvitas and Klasinc, 1977
Cvitas, T.; Klasinc, L., Photoelectron spectra of bromobenzenes, Croat. Chem. Acta., 1977, 50, 291. [all data]

Streets and Ceasar, 1973
Streets, D.G.; Ceasar, G.P., Inductive mesomeric effects on the «pi» orbitals of halobenzenes, Mol. Phys., 1973, 26, 1037. [all data]

Momigny, 1959
Momigny, J., Determination et discussion des potentials d'apparition d'ions fragmentaires dans le benzene et ses derives monohalogenes, Bull. Soc. Roy. Sci. Liege, 1959, 28, 251. [all data]

Malinovich, Arakawa, et al., 1985
Malinovich, Y.; Arakawa, R.; Haase, G.; Lifshitz, C., Time-dependent mass spectra and breakdown graphs. VI. Slow unimolecular dissociation of bromobenzene ions at near threshold energies, J. Phys. Chem., 1985, 89, 2253. [all data]

Dunbar and Honovich, 1984
Dunbar, R.C.; Honovich, J.P., Threshold ion photodissociation. Bromobenzene and iodobenzene ions, Int. J. Mass Spectrom. Ion Processes, 1984, 58, 25. [all data]

Burgers and Holmes, 1984
Burgers, P.C.; Holmes, J.L., Fragmentation rate constants and appearance energies for reactions having a large kinetic shift and the energy partitioning in their metastable decomposition, Int. J. Mass Spectrom. Ion Processes, 1984, 58, 15. [all data]

Burgers and Holmes, 1982
Burgers, P.C.; Holmes, J.L., Metastable ion studies. XIII. The measurement of appearance energies of metastable peaks, Org. Mass Spectrom., 1982, 17, 123. [all data]

Rosenstock, Stockbauer, et al., 1980
Rosenstock, H.M.; Stockbauer, R.; Parr, A.C., Photoelectron-photoion coincidence study of the bromobenzene ion, J. Chem. Phys., 1980, 73, 773. [all data]

Johnstone and Mellon, 1972
Johnstone, R.A.W.; Mellon, F.A., Electron-impact ionization and appearance potentials, J. Chem. Soc. Faraday Trans. 2, 1972, 68, 1209. [all data]

Howe and Williams, 1969
Howe, I.; Williams, D.H., Calculation and qualitative predictions of mass spectra. Mono- and paradisubstituted benzenes, J. Am. Chem. Soc., 1969, 91, 7137. [all data]

Wenthold and Squires, 1995
Wenthold, P.G.; Squires, R.R., Determination of the gas-phase acidities of halogen-substituted aromatic compounds using the silane-cleavage method, J. Mass Spectrom., 1995, 30, 1, 17, https://doi.org/10.1002/jms.1190300105 . [all data]

Linnert and Riveros, 1994
Linnert, H.V.; Riveros, J.M., Benzyne-related mechanisms in the gas phase ion molecule reactions of haloarenes, Int. J. Mass Spectrom. Ion Proc., 1994, 140, 1, 163, https://doi.org/10.1016/0168-1176(94)04079-6 . [all data]


Notes

Go To: Top, Gas phase ion energetics data, References