Carbon tetrabromide
- Formula: CBr4
- Molecular weight: 331.627
- IUPAC Standard InChIKey: HJUGFYREWKUQJT-UHFFFAOYSA-N
- CAS Registry Number: 558-13-4
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: Methane, tetrabromo-; Carbon bromide (CBr4); Methane tetrabromide; Tetrabromomethane; CBr4; Carbon bromide; Bromid uhlicity; UN 2516; NSC 6179
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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
B - John E. Bartmess
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
IE (evaluated) | 10.31 ± 0.02 | eV | N/A | N/A | L |
Electron affinity determinations
EA (eV) | Method | Reference | Comment |
---|---|---|---|
2.0598 | SI | Page and Goode, 1969 | The Magnetron method, lacking mass analysis, is not considered reliable. G3MP2B3 calculations indicate an EA of ca. 1.4 eV.; B |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
10.3 ± 0.2 | EI | Kime, Driscoll, et al., 1987 | LBLHLM |
10.8 ± 0.3 | EI | Kaposi, Riedel, et al., 1976 | LLK |
10.31 ± 0.02 | PI | Werner, Tsai, et al., 1974 | LLK |
10.54 | PE | Dixon, Murrell, et al., 1971 | Vertical value; LLK |
10.39 | PE | Potts, Lempka, et al., 1970 | Vertical value; RDSH |
10.40 | PE | Green, Green, et al., 1970 | Vertical value; RDSH |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
Br+ | 14.5 ± 0.5 | ? | EI | Kaposi, Riedel, et al., 1976 | LLK |
Br+ | 18.1 ± 0.2 | ? | EI | Thorburn, 1965 | RDSH |
Br2+ | 17.2 ± 0.3 | ? | EI | Kaposi, Riedel, et al., 1976 | LLK |
Br2+ | 13.3 ± 0.1 | ? | EI | DeCorpo and Franklin, 1971 | LLK |
C+ | 23.0 ± 0.5 | ? | EI | Kaposi, Riedel, et al., 1976 | LLK |
C+ | 23.1 ± 0.4 | ? | EI | Thorburn, 1965 | RDSH |
CBr+ | 19.3 ± 0.4 | 3Br | EI | Kaposi, Riedel, et al., 1976 | LLK |
CBr+ | 17.5 ± 0.2 | ? | EI | Thorburn, 1965 | RDSH |
CBr+ | 16.35 ± 0.13 | ? | EI | Reed and Snedden, 1958 | RDSH |
CBr2+ | 14.5 ± 0.3 | ? | EI | Kaposi, Riedel, et al., 1976 | LLK |
CBr2+ | 14.6 ± 0.3 | ? | EI | Thorburn, 1965 | RDSH |
CBr2+ | 12.30 ± 0.08 | ? | EI | Reed and Snedden, 1958 | RDSH |
CBr3+ | 11.4 ± 0.3 | Br | EI | Kaposi, Riedel, et al., 1976 | LLK |
CBr3+ | 10.47 ± 0.02 | Br | PI | Werner, Tsai, et al., 1974 | LLK |
CBr3+ | 11.3 ± 0.2 | Br | EI | Thorburn, 1965 | RDSH |
CBr3+ | 9.95 ± 0.05 | Br | EI | Reed and Snedden, 1958 | RDSH |
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.
Page and Goode, 1969
Page, F.M.; Goode, G.C.,
Negative Ions and the Magnetron., Wiley, NY, 1969. [all data]
Kime, Driscoll, et al., 1987
Kime, Y.J.; Driscoll, D.C.; Dowben, P.A.,
The stability of the carbon tetrahalide ions,
J. Chem. Soc. Faraday Trans. 2, 1987, 83, 403. [all data]
Kaposi, Riedel, et al., 1976
Kaposi, O.; Riedel, M.; Vass-Balthazar, K.; Sanchez, G.R.; Lelik, L.,
Mass-spectrometric determination of thermochemical data of CHBr3 and CBr4 by study of their electron impact and heterogeneous pyrolytic decompositions,
Acta Chim. Acad. Sci. Hung., 1976, 89, 221. [all data]
Werner, Tsai, et al., 1974
Werner, A.S.; Tsai, B.P.; Baer, T.,
Photoionization study of the ionization potentials fragmentation paths of the chlorinated methanes carbon tetrabromide,
J. Chem. Phys., 1974, 60, 3650. [all data]
Dixon, Murrell, et al., 1971
Dixon, R.N.; Murrell, J.N.; Narayan, B.,
The photoelectron spectra of the halomethanes,
Mol. Phys., 1971, 20, 611. [all data]
Potts, Lempka, et al., 1970
Potts, A.W.; Lempka, H.J.; Streets, D.G.; Price, W.C.,
Photoelectron spectra of the halides of elements in groups III, IV, V and VI,
Phil. Trans. Roy. Soc. (London), 1970, A268, 59. [all data]
Green, Green, et al., 1970
Green, J.C.; Green, M.L.H.; Joachim, P.J.; Orchard, A.F.; Turner, D.W.,
A study of the bonding in the group IV tetrahalides by photoelectron spectroscopy,
Phil. Trans. Roy. Soc. (London), 1970, A268, III. [all data]
Thorburn, 1965
Thorburn, R.,
Ionization and dissociation by electron impact in carbon tetrabromide,
Brit. J. Appl. Phys., 1965, 16, 1397. [all data]
DeCorpo and Franklin, 1971
DeCorpo, J.J.; Franklin, J.L.,
Electron affinities of the halogen molecules by dissociative electron attachment,
J. Chem. Phys., 1971, 54, 1885. [all data]
Reed and Snedden, 1958
Reed, R.I.; Snedden, W.,
Studies in electron impact methods. Part 2. The latent heat of sublimation of carbon,
J. Chem. Soc. Faraday Trans., 1958, 54, 301. [all data]
Notes
Go To: Top, Gas phase ion energetics data, References
- Symbols used in this document:
AE Appearance energy EA Electron affinity IE (evaluated) Recommended ionization energy - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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