Benzamide
- Formula: C7H7NO
- Molecular weight: 121.1366
- IUPAC Standard InChIKey: KXDAEFPNCMNJSK-UHFFFAOYSA-N
- CAS Registry Number: 55-21-0
- 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. - Species with the same structure:
- Other names: Benzoic acid amide; Benzoylamide; Phenylcarboxyamide
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Reaction thermochemistry data
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: John E. Bartmess
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Individual Reactions
C7H6NO- + =
By formula: C7H6NO- + H+ = C7H7NO
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1481. ± 8.8 | kJ/mol | G+TS | Taft, 1987 | gas phase; value altered from reference due to change in acidity scale |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 1452. ± 8.4 | kJ/mol | IMRE | Taft, 1987 | gas phase; value altered from reference due to change in acidity scale |
Gas phase ion energetics data
Go To: Top, Reaction thermochemistry data, 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
Data compiled as indicated in comments:
B - John E. Bartmess
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 |
---|---|---|---|---|---|
Proton affinity (review) | 892.1 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
Quantity | Value | Units | Method | Reference | Comment |
Gas basicity | 861.2 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
9.25 | EI | Elder, Beynon, et al., 1976 | LLK |
9.60 | EI | Benoit, 1973 | LLK |
9.4 ± 0.2 | EI | Cotter, Soc. 1965 | RDSH |
9.45 | PE | McAlduff, Lynch, et al., 1978 | Vertical value; LLK |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
C6H5+ | 14.21 | NH2+CO | EI | Benoit, 1973 | LLK |
C6H5+ | 13.5 ± 0.1 | ? | EI | Cotter, Soc. 1965 | RDSH |
C7H5N+ | 10.19 ± 0.10 | H2O | EI | Cotter, 1964 | RDSH |
C7H5O+ | 10.1 | NH2 | EI | Elder, Beynon, et al., 1976 | LLK |
C7H5O+ | 11.09 | NH2 | EI | Benoit, 1973 | LLK |
C7H5O+ | 9.9 ± 0.1 | NH2 | EI | Cotter, Soc. 1965 | RDSH |
De-protonation reactions
C7H6NO- + =
By formula: C7H6NO- + H+ = C7H7NO
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1481. ± 8.8 | kJ/mol | G+TS | Taft, 1987 | gas phase; value altered from reference due to change in acidity scale; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 1452. ± 8.4 | kJ/mol | IMRE | Taft, 1987 | gas phase; value altered from reference due to change in acidity scale; B |
References
Go To: Top, Reaction thermochemistry data, 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.
Taft, 1987
Taft, R.W.,
The Nature and Analysis of Substitutent Electronic Effects,
Personal communication. See also Prog. Phys. Org. Chem., 1987, 16, 1. [all data]
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]
Elder, Beynon, et al., 1976
Elder, J.F.; Beynon, J.H.; Cooks, R.G.,
The benzoyl ion. Thermochemistry and kinetic energy release,
Org. Mass Spectrom., 1976, 11, 415. [all data]
Benoit, 1973
Benoit, F.,
The benzoyl cation: The participation of isolated electronic excited states in the dissociation of molecular ions of the form [C6H5COX]+,
Org. Mass Spectrom., 1973, 7, 1407. [all data]
Cotter, Soc. 1965
Cotter, J.L.,
Electron-impact fragmentation of pentafluorobenzamide,
J. Chem., Soc. 1965, 5742. [all data]
McAlduff, Lynch, et al., 1978
McAlduff, E.J.; Lynch, B.M.; Houk, K.N.,
Photoelectron spectra of substituted benzamides,
Can. J. Chem., 1978, 56, 495. [all data]
Cotter, 1964
Cotter, J.L.,
Electron impact fragmentation patterns of acetanilide and benzamide,
J. Chem. Soc., 1964, 5477. [all data]
Notes
Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, References
- Symbols used in this document:
AE Appearance 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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