Benzyl nitrile
- Formula: C8H7N
- Molecular weight: 117.1479
- IUPAC Standard InChIKey: SUSQOBVLVYHIEX-UHFFFAOYSA-N
- CAS Registry Number: 140-29-4
- 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: Benzyl cyanide; Benzeneacetonitrile; Acetonitrile, phenyl-; α-Cyanotoluene; α-Tolunitrile; ω-Cyanotoluene; Phenylacetonitrile; 2-Phenylacetonitrile; Toluene, α-cyano-; USAF KF-21; (Cyanomethyl)benzene; Phenyl acetyl nitrile; UN 2470; Phenacetonitrile; 2-Phenylethanenitrile; NSC 118418
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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:
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
LL - Sharon G. Lias and Joel F. Liebman
View reactions leading to C8H7N+ (ion structure unspecified)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
IE (evaluated) | 9.39 ± 0.07 | eV | N/A | N/A | L |
Quantity | Value | Units | Method | Reference | Comment |
Proton affinity (review) | 192.5 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Quantity | Value | Units | Method | Reference | Comment |
Gas basicity | 185.2 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
9.32 ± 0.05 | EI | Selim, Rabbih, et al., 1987 | LBLHLM |
9.34 | EI | Van Der Greef, Molenaar-Langeveld, et al., 1979 | LLK |
9.50 ± 0.04 | EI | Buchs, 1970 | RDSH |
9.40 ± 0.05 | EI | Pignataro, Foffani, et al., 1966 | RDSH |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
C5H3+ | 17.31 ± 0.10 | HCN+H+C2H2 | EI | Selim, Rabbih, et al., 1989 | LL |
C5H3+ | 18.36 ± 0.12 | CN+H2+C2H2 | EI | Selim, Rabbih, et al., 1989 | LL |
C7H6+ | 12.23 ± 0.05 | HCN | EI | Selim, Rabbih, et al., 1987, 2 | LBLHLM |
C7H6+ | 12.19 | HCN | EI | Van Der Greef, Molenaar-Langeveld, et al., 1979 | LLK |
C7H7+ | 12.58 ± 0.09 | CN | EI | Selim, Rabbih, et al., 1987, 3 | LBLHLM |
C8H6N+ | 12.46 ± 0.06 | H | EI | Selim, Rabbih, et al., 1987 | LBLHLM |
De-protonation reactions
C8H6N- + =
By formula: C8H6N- + H+ = C8H7N
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 350.7 ± 2.3 | kcal/mol | G+TS | Fujio, McIver, et al., 1981 | gas phase; value altered from reference due to change in acidity scale; B |
ΔrH° | 351.5 ± 3.2 | kcal/mol | G+TS | Cumming and Kebarle, 1978 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 344.1 ± 2.0 | kcal/mol | IMRE | Fujio, McIver, et al., 1981 | gas phase; value altered from reference due to change in acidity scale; B |
ΔrG° | 344.9 ± 2.0 | kcal/mol | IMRE | Cumming and Kebarle, 1978 | gas phase; 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]
Selim, Rabbih, et al., 1987
Selim, E.T.; Rabbih, M.A.; Fahmey, M.A.,
M and [M-1]+ ions formed for benzyl alcohol, benzyl amine and benzyl cyanide,
Org. Mass Spectrom., 1987, 22, 381. [all data]
Van Der Greef, Molenaar-Langeveld, et al., 1979
Van Der Greef, J.; Molenaar-Langeveld, T.A.; Nibbering, N.M.M.,
The elimination of HCN (or HNC) from the molecular ions of some isomeric C8H7N compounds, studied by field ionization kinetic and kinetic energy release measurements,
Int. J. Mass Spectrom. Ion Phys., 1979, 29, 11. [all data]
Buchs, 1970
Buchs, A.,
Etude par spectrometrie de masse de l'ionisation de benzonitriles, de phenylacetonitriles et de N,N-dimethylanilines substitues,
Helv. Chim. Acta, 1970, 53, 2026. [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]
Selim, Rabbih, et al., 1989
Selim, E.T.M.; Rabbih, M.A.; Fahmey Ahmad, M.A.; Shalbi, A.S.,
Energetic study of [C5H3]+ fragment ion produced from some benzyl derivatives,
Arab Gulf J. Sci. Res., 1989, 7, 53. [all data]
Selim, Rabbih, et al., 1987, 2
Selim, E.T.; Rabbih, M.A.; Rezk, A.M.H.; Fahmey, M.A.,
Energetics of [C7H6]+ fragment ion using electron impact technique,
Indian J. Pure Appl. Phys., 1987, 25, 451. [all data]
Selim, Rabbih, et al., 1987, 3
Selim, E.T.M.; Rabbih, M.A.; Fahmey, M.A.,
A mass spectrometric study of [C7H7]+ and [C6H7]+ fragment ions obtained from benzyl alcohol, benzyl amine and benzyl cyanide,
Egypt. J. Phys., 1987, 18, 37. [all data]
Fujio, McIver, et al., 1981
Fujio, M.; McIver, R.T., Jr.; Taft, R.W.,
Effects on the acidities of phenols from specific substituent-solvent interactions. Inherent substituent parameters from gas phase acidities,
J. Am. Chem. Soc., 1981, 103, 4017. [all data]
Cumming and Kebarle, 1978
Cumming, J.B.; Kebarle, P.,
Summary of gas phase measurements involving acids AH. Entropy changes in proton transfer reactions involving negative ions. Bond dissociation energies D(A-H) and electron affinities EA(A),
Can. J. Chem., 1978, 56, 1. [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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