Benzene, (bromomethyl)-
- Formula: C7H7Br
- Molecular weight: 171.034
- IUPAC Standard InChIKey: AGEZXYOZHKGVCM-UHFFFAOYSA-N
- CAS Registry Number: 100-39-0
- 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: Benzyl bromide; Toluene, α-bromo-; α-Bromotoluene; ω-Bromotoluene; (Bromomethyl)benzene; Bromophenylmethane; 1-Bromotoluene; Bromotoluene, α; UN 1737; NSC 8041; Phenylmethyl bromide
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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:
B - John E. Bartmess
LL - Sharon G. Lias and Joel F. Liebman
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) | 8.99 ± 0.015 | eV | N/A | N/A | L |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
9.02 ± 0.02 | PI | Traeger and Kompe, 1990 | LL |
8.99 ± 0.015 | PIPECO | Baer, Morrow, et al., 1988 | LL |
8.9 | EI | Yeo and Williams, 1970 | RDSH |
9.1 ± 0.1 | EI | Grutzmacher, 1970 | RDSH |
9.10 ± 0.05 | EI | Pignataro, Foffani, et al., 1966 | RDSH |
9.23 | PE | Schmidt and Schweig, 1973 | Vertical value; LLK |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
C7H7+ | 9.27 ± 0.02 | Br | PI | Traeger and Kompe, 1990 | LL |
C7H7+ | 9.79 | Br | PIPECO | Baer, Morrow, et al., 1988 | T = 0K; LL |
C7H7+ | 9.80 | Br | PIPECO | Baer, Morrow, et al., 1988 | T = 298K; LL |
C7H7+ | 9.1 | Br | EI | Yeo and Williams, 1970 | RDSH |
De-protonation reactions
C7H6Br- + =
By formula: C7H6Br- + H+ = C7H7Br
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1557. ± 8.8 | kJ/mol | G+TS | Poutsma, Nash, et al., 1997 | gas phase; acidity comparable to MeCN, between HF and tBuCH(Me)OH; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 1527. ± 8.4 | kJ/mol | IMRB | Poutsma, Nash, et al., 1997 | gas phase; acidity comparable to MeCN, between HF and tBuCH(Me)OH; 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.
Traeger and Kompe, 1990
Traeger, J.C.; Kompe, B.M.,
Threshold C7H7 formation from the benzyl halides by photoionization mass spectrometry,
Int. J. Mass Spectrom. Ion Processes, 1990, 101, 111. [all data]
Baer, Morrow, et al., 1988
Baer, T.; Morrow, J.C.; Shao, J.D.; Olesik, S.,
Gas-phase heats of formation of C7H7+ isomers: m-Tolyl, p-tolyl, and benzyl ions,
J. Am. Chem. Soc., 1988, 110, 5633. [all data]
Yeo and Williams, 1970
Yeo, A.N.H.; Williams, D.H.,
Rearrangement in the molecular ions of halogenotoluenes prior to fragmentation in the mass spectrometer,
Chem. Commun., 1970, 886. [all data]
Grutzmacher, 1970
Grutzmacher, H.-F.,
Zum Mechanismus massenspektrometrischer Fragmentierungsreaktionen-IV: zur Bildung von Phenonium-Ionen bei der Elektronenstoss-Fragmentierung von -Phenylathylbromiden,
Org. Mass Spectrom., 1970, 3, 131. [all data]
Pignataro, Foffani, et al., 1966
Pignataro, S.; Foffani, A.; Innorta, G.; Distefano, G.,
Molecular structural effects on the ionization potentials for metasubstituted aromatic compounds and for compounds of the type X-CH2-R,
Z. Physik. Chem. (Frankfurt), 1966, 49, 291. [all data]
Schmidt and Schweig, 1973
Schmidt, H.; Schweig, A.,
C-Hal hyperkonjugation,
Tetrahedron Lett., 1973, 981. [all data]
Poutsma, Nash, et al., 1997
Poutsma, J.C.; Nash, J.J.; Paulino, J.A.; Squires, R.R.,
Absolute Heats of Formation of Phenylcarbene and Vinylcarbene,
J. Am. Chem. Soc., 1997, 119, 20, 4686, https://doi.org/10.1021/ja963918s
. [all data]
Notes
Go To: Top, Gas phase ion energetics data, References
- Symbols used in this document:
AE Appearance energy IE (evaluated) Recommended ionization energy ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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