Benzene, 1,4-dibromo-

Data at NIST subscription sites:

NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.


Gas phase ion energetics data

Go To: Top, 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:
L - Sharon G. Lias

Data compiled as indicated in comments:
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

Quantity Value Units Method Reference Comment
IE (evaluated)8.82 ± 0.03eVN/AN/AL
Quantity Value Units Method Reference Comment
Δf(+) ion234.kcal/molN/AN/A 
Quantity Value Units Method Reference Comment
ΔfH(+) ion,0K240.kcal/molN/AN/A 

Ionization energy determinations

IE (eV) Method Reference Comment
8.82 ± 0.02PIPECOOlesik, Baer, et al., 1986LBLHLM
8.85 ± 0.02PIMoini and Leroi, 1986LBLHLM
8.8PEKimura, Katsumata, et al., 1981LLK
8.9 ± 0.15CTSVoigt and Reid, 1964RDSH
8.90PEKimura, Katsumata, et al., 1981Vertical value; LLK
8.909PEPotts, Lyus, et al., 1980Vertical value; LLK
8.90 ± 0.03PECvitas and Klasinc, 1977Vertical value; LLK
8.91PEStreets and Ceasar, 1973Vertical value; LLK
8.97PEBaker, May, et al., 1968Vertical value; RDSH

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
C6H4+12.3 ± 0.1Br2PIMoini and Leroi, 1986LBLHLM
C6H4Br+12.17 ± 0.05BrPIMoini and Leroi, 1986LBLHLM

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.

Olesik, Baer, et al., 1986
Olesik, S.; Baer, T.; Morrow, J.C., Dissociation rates of energy-selected dichloro- and dibromobenzene ions, J. Phys. Chem., 1986, 90, 3563. [all data]

Moini and Leroi, 1986
Moini, M.; Leroi, G.E., Photoionization and fragmentation of o-, m- and p-dibromobenzene: Isomer scrambling and product thermochemistry, J. Phys. Chem., 1986, 90, 4002. [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]

Voigt and Reid, 1964
Voigt, E.M.; Reid, C., Ionization potentials of substituted benzenes and their charge-transfer spectra with tetracyanoethylene, J. Am. Chem. Soc., 1964, 86, 3930. [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]

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 π orbitals of halobenzenes, Mol. Phys., 1973, 26, 1037. [all data]

Baker, May, et al., 1968
Baker, A.D.; May, D.P.; Turner, D.W., Molecular photoelectron spectroscopy. Part VII. The vertical ionisation potentials of benzene and some of its monosubstituted and 1,4-disubstituted derivatives, J. Chem. Soc. B, 1968, 22. [all data]


Notes

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