Benzaldehyde, 4-chloro-
- Formula: C7H5ClO
- Molecular weight: 140.567
- IUPAC Standard InChI: InChI=1S/C7H5ClO/c8-7-3-1-6(5-9)2-4-7/h1-5H
- IUPAC Standard InChIKey: AVPYQKSLYISFPO-UHFFFAOYSA-N
- CAS Registry Number: 104-88-1
- 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: Benzaldehyde, p-chloro-; p-Chlorobenzaldehyde; 4-Chlorobenzaldehyde; p-Chlorobenzenecarboxaldehyde; 4-Chlorbenzaldehyd
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Gas phase ion energetics data
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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:
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| Proton affinity (review) | 198.7 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
| Quantity | Value | Units | Method | Reference | Comment |
| Gas basicity | 191.1 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Electron affinity determinations
| EA (eV) | Method | Reference | Comment |
|---|---|---|---|
| 0.659 ± 0.087 | IMRE | Mishima, Huh, et al., 1993 | ΔGea(343 K)=-15.8 kcal/mol. Reanchored to EA(PhNO2), Kebarle and Chowdhury, 1987.; B |
| 0.676 ± 0.087 | IMRE | Huh, Kang, et al., 1999 | ΔG(EA) 343K; anchored to ΔG value. Including anchor ΔS, EA is ca. 0.4 kcal/mol more bound.; B |
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 9.61 ± 0.01 | EI | Foffani, Pignataro, et al., 1964 | RDSH |
| 9.57 | PE | Gal, Geribaldi, et al., 1985 | Vertical value; LBLHLM |
| 9.59 | PE | Baker, May, et al., 1968 | Vertical value; 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.
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]
Mishima, Huh, et al., 1993
Mishima, M.; Huh, C.; Nakamura, H.; Fujio, M.; Tsuno, Y.,
Electron Affinities of Benzaldehydes. Substituent Effects on Stabilities of Aromatic Radical Anions.,
Tetrahed. Lett., 1993, 34, 26, 4223, https://doi.org/10.1016/S0040-4039(00)60533-6
. [all data]
Kebarle and Chowdhury, 1987
Kebarle, P.; Chowdhury, S.,
Electron affinities and electron transfer reactions,
Chem. Rev., 1987, 87, 513. [all data]
Huh, Kang, et al., 1999
Huh, C.; Kang, C.H.; Lee, H.W.; Nakamura, H.; Mishima, M.; Tsuno, Y.; Yamataka, H.,
Thermodynamic stabilities and resonance demand of aromatic radical anions in the gas phase,
Bull. Chem. Soc. Japan, 1999, 72, 5, 1083-1091, https://doi.org/10.1246/bcsj.72.1083
. [all data]
Foffani, Pignataro, et al., 1964
Foffani, A.; Pignataro, S.; Cantone, B.; Grasso, F.,
Ionization potentials and substituent effects for aromatic carbonyl compounds,
Z. Physik. Chem. (Frankfurt), 1964, 42, 221. [all data]
Gal, Geribaldi, et al., 1985
Gal, J.-F.; Geribaldi, S.; Pfister-Guillouzo, G.; Morris, D.G.,
Basicity of the carbonyl group. Part 12. Correlations between ionization potentials and lewis basicities in aromatic carbonyl compounds,
J. Chem. Soc. Perkin Trans. 2, 1985, 103. [all data]
Baker, May, et al., 1968
Baker, A.D.; May, D.P.; Turner, D.W.,
Molecular photoelectron spectroscopy. Part VII. The vertical ionisation potentials of benzene and some of its monosubstituted and 1,4-disubstituted derivatives,
J. Chem. Soc. B, 1968, 22. [all data]
Notes
Go To: Top, Gas phase ion energetics data, References
- Symbols used in this document:
EA Electron affinity - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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