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, 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 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 |
Mass spectrum (electron ionization)
Go To: Top, Gas phase ion energetics data, 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 | Japan AIST/NIMC Database- Spectrum MS-NW-2301 |
NIST MS number | 230282 |
References
Go To: Top, Gas phase ion energetics data, Mass spectrum (electron ionization), 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, Mass spectrum (electron ionization), 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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