Aniline
- Formula: C6H7N
- Molecular weight: 93.1265
- IUPAC Standard InChIKey: PAYRUJLWNCNPSJ-UHFFFAOYSA-N
- CAS Registry Number: 62-53-3
- 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. - Isotopologues:
- Other names: Benzenamine; Aminobenzene; Aminophen; Anyvim; Benzene, amino-; Blue Oil; C.I. 76000; Phenylamine; Aniline Oil; Aniline reagent; Anilin; Anilina; Benzidam; C.I. Oxidation base 1; Cyanol; Huile D'aniline; Krystallin; Kyanol; NCI-C03736; Rcra waste number U012; UN 1547; Benzeneamine
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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
View reactions leading to C6H7N+ (ion structure unspecified)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
IE (evaluated) | 7.720 ± 0.002 | eV | N/A | N/A | L |
Quantity | Value | Units | Method | Reference | Comment |
Proton affinity (review) | 882.5 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
Quantity | Value | Units | Method | Reference | Comment |
Gas basicity | 850.6 | kJ/mol | N/A | Hunter and Lias, 1998 | HL |
Ionization energy determinations
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
C4H4N+ | 12.3 ± 0.1 | ? | PI | Akopyan and Vilesov, 1964 | RDSH |
C5H5+ | 15.2 ± 0.2 | CHN+H | EI | Tajima and Tsuchiya, 1973 | LLK |
C5H5+ | 15.24 | CHN+H | EI | Occolowitz and White, 1968 | RDSH |
C5H6+ | 11.3 ± 0.1 | CHN | TRPI | Lifshitz and Malinovich, 1984 | LBLHLM |
C5H6+ | 11.3 ± 0.2 | CHN | EI | Lifshitz, Gotchiguian, et al., 1983 | LBLHLM |
C5H6+ | 12.77 ± 0.05 | CHN | EI | Zaretskii, Oren, et al., 1976 | LLK |
C5H6+ | 12.13 ± 0.06 | CHN | EI | Bentley, Johnstone, et al., 1973 | LLK |
C5H6+ | 12.0 ± 0.1 | ? | EI | Gross, 1972 | LLK |
C5H6+ | 12.3 ± 0.1 | CHN | PI | Akopyan and Vilesov, 1964 | RDSH |
De-protonation reactions
C6H6N- + =
By formula: C6H6N- + H+ = C6H7N
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1540.5 ± 1.3 | kJ/mol | D-EA | Wren, Vogelhuber, et al., 2012 | gas phase; B |
ΔrH° | 1533. ± 8.8 | kJ/mol | G+TS | Bartmess, Scott, et al., 1979 | gas phase; value altered from reference due to change in acidity scale; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 1510.0 ± 2.8 | kJ/mol | H-TS | Wren, Vogelhuber, et al., 2012 | gas phase; B |
ΔrG° | 1502. ± 8.4 | kJ/mol | IMRE | Bartmess, Scott, et al., 1979 | gas phase; value altered from reference due to change in acidity scale; 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]
Meek, Sekreta, et al., 1985
Meek, J.T.; Sekreta, E.; Wilson, W.; Viswanathan, K.S.; Reilly, J.P.,
The laser photoelectron spectrum of gas phase aniline,
J. Chem. Phys., 1985, 82, 1741. [all data]
Hager, Smith, et al., 1985
Hager, J.; Smith, M.; Wallace, S.,
Autoionizing Rydberg structure observed in the vibrationally selective, two-color threshold photoionization spectrum of jet-cooled aniline,
J. Chem. Phys., 1985, 83, 4820. [all data]
Smith, Hager, et al., 1984
Smith, M.A.; Hager, J.W.; Wallace, S.C.,
Two color photoionization spectroscopy of jet cooled aniline: Vibrational frequencies of the aniline X2B1 radical cation,
J. Chem. Phys., 1984, 80, 3097. [all data]
Klasinc, Kovac, et al., 1983
Klasinc, L.; Kovac, B.; Gusten, H.,
Photoelectron spectra of acenes. Electronic structure and substituent effects,
Pure Appl. Chem., 1983, 55, 289. [all data]
Kimura, Katsumata, et al., 1981
Kimura, K.; Katsumata, S.; Achiba, Y.; Yamazaki, T.; Iwata, S.,
Ionization energies, Ab initio assignments, and valence electronic structure for 200 molecules
in Handbook of HeI Photoelectron Spectra of Fundamental Organic Compounds, Japan Scientific Soc. Press, Tokyo, 1981. [all data]
Zaretskii, Oren, et al., 1976
Zaretskii, Z.V.I.; Oren, D.; Kelner, L.,
Automatic method for the measurement of the electron impact ionization and appearance potentials,
Appl. Spectrosc., 1976, 30, 366. [all data]
Behan, Johnstone, et al., 1976
Behan, J.M.; Johnstone, R.A.W.; Bentley, T.W.,
An evaluation of empirical methods for calculating the ionization potentials of substituted benzenes,
Org. Mass Spectrom., 1976, 11, 207. [all data]
Baldwin, Loudon, et al., 1976
Baldwin, M.A.; Loudon, A.G.; Maccoll, A.; Webb, K.S.,
The nature and fragmentation pathways of the molecular ions of some arylureas, arylthioureas, acetanilides, thioacetanilides and related compounds,
Org. Mass Spectrom., 1976, 11, 1181. [all data]
Debies and Rabalais, 1974
Debies, T.P.; Rabalais, J.W.,
Photoelectron spectra of substituted benzenes. III. Bonding with Group V substituents,
Inorg. Chem., 1974, 13, 308. [all data]
Maier and Turner, 1973
Maier, J.P.; Turner, D.W.,
Steric inhibition of resonance studied by molecular photoelectron spectroscopy Part 3. Anilines, Phenols and Related Compounds,
J. Chem. Soc. Faraday Trans. 2, 1973, 69, 521. [all data]
Gilbert, Leach, et al., 1973
Gilbert, J.R.; Leach, W.P.; Miller, J.R.,
Ionisation appearance potential measurements in arene chromium tricarbonyls,
J. Organomet. Chem., 1973, 49, 219. [all data]
Debies and Rabalais, 1973
Debies, T.P.; Rabalais, J.W.,
Photoelectron spectra of substituted benzenes. II. Seven valence electron substituents,
J. Electron Spectrosc. Relat. Phenom., 1973, 1, 355. [all data]
Cowling and Johnstone, 1973
Cowling, S.A.; Johnstone, R.A.W.,
Photoelectron spectroscopy: The effects of steric inhibition to resonance in anilines,
J. Electron Spectrosc. Relat. Phenom., 1973, 2, 161. [all data]
Cooks, Bertrand, et al., 1973
Cooks, R.G.; Bertrand, M.; Beynon, J.H.; Rennekamp, M.E.; Setser, D.W.,
Energy partitioning data as an ion structure probe. Substituted anisoles,
J. Am. Chem. Soc., 1973, 95, 1732. [all data]
Johnstone and Mellon, 1972
Johnstone, R.A.W.; Mellon, F.A.,
Electron-impact ionization and appearance potentials,
J. Chem. Soc. Faraday Trans. 2, 1972, 68, 1209. [all data]
Gross, 1972
Gross, M.L.,
Ion cyclotron resonance spectrometry. A means of evaluating 'kinetic shifts',
Org. Mass Spectrom., 1972, 6, 827. [all data]
Potapov and Iskakov, 1971
Potapov, V.K.; Iskakov, L.I.,
Electronic structure and photoionization of aromatic amines,
High Energy Chem., 1971, 5, 237, In original 264. [all data]
Johnstone, Mellon, et al., 1971
Johnstone, R.A.W.; Mellon, F.A.; Ward, S.D.,
On-line computer methods used in conjunction with the measurement of ionization appearance potentials,
Adv. Mass Spectrom., 1971, 5, 334. [all data]
Zandberg and Rasulev, 1969
Zandberg, E.Ya.; Rasulev, U.Kh.,
Surface ionization of aniline molecules,
Zh. Tekhn. Fiz. 1968,38,1798 (Engl. Transl.: Soviet Phys. - Tech. Phys., 1969, 13, 1450). [all data]
Eland, 1969
Eland, J.H.D.,
Photoelectron spectra of conjugated hydrocarbons and heteromolecules,
Intern. J. Mass Spectrom. Ion Phys., 1969, 2, 471. [all data]
Akopyan and Vilesov, 1964
Akopyan, M.E.; Vilesov, F.I.,
Excited states of positive ions and dissociative photoionization of aromatic amines,
Dokl. Akad. Nauk SSSR, 1964, 158, 1386, In original 965. [all data]
Terenin, 1961
Terenin, A.,
Charge transfer in organic solids, induced by light,
Proc. Chem. Soc., London, 1961, 321. [all data]
Watanabe and Mottl, 1957
Watanabe, K.; Mottl, J.R.,
Ionization potentials of ammonia and some amines,
J. Chem. Phys., 1957, 26, 1773. [all data]
Vilesov and Terenin, 1957
Vilesov, F.I.; Terenin, A.N.,
The photoionization of the vapors of certain organic compounds,
Dokl. Akad. Nauk SSSR, 1957, 115, 744, In original 539. [all data]
Furin, Sultanov, et al., 1987
Furin, G.G.; Sultanov, A.S.; Furlei, I.I.,
Photoelectronic spectra of fluorine-containing aromatic amines,
Dokl. Phys. Chem., 1987, 530. [all data]
Meeks, Wahlborg, et al., 1981
Meeks, J.; Wahlborg, A.; McGlynn, S.P.,
Photoelectron spectroscopy of carbonyls: Benzoic acid and its derivatives,
J. Electron Spectrosc. Relat. Phenom., 1981, 22, 43. [all data]
Palmer, Moyes, et al., 1979
Palmer, M.H.; Moyes, W.; Spiers, M.; Ridyard, J.N.A.,
The electronic structure of substituted benzenes; a study of aniline, the toluidines, phenylenediamines and fluoroanilines by photoelectron spectroscopy and ab initio calculations,
J. Mol. Struct., 1979, 53, 235. [all data]
Kobayashi, 1978
Kobayashi, T.,
A simple general tendency in photoelectron angular distributions of some monosubstituted benzenes,
Phys. Lett., 1978, 69, 105. [all data]
Kobayashi and Nagakura, 1974
Kobayashi, T.; Nagakura, S.,
Photoelectron spectra of substituted benzenes,
Bull. Chem. Soc. Jpn., 1974, 47, 2563. [all data]
Haink, Adams, et al., 1974
Haink, H.J.; Adams, J.E.; Huber, J.R.,
The electronic structure of aromatic amines: photoelectron spectroscopy of diphenylamine, iminobibenzyl, acridan and carbazole,
Ber. Bunsen-Ges. Phys. Chem., 1974, 78, 436. [all data]
Kobayashi and Nagakura, 1972
Kobayashi, T.; Nagakura, S.,
Photoelectron spectra of anilines,
Chem. Lett., 1972, 1013. [all data]
Tajima and Tsuchiya, 1973
Tajima, S.; Tsuchiya, T.,
Energetics consideration of C5H5+ ions produced from various precursors by electron impact,
Bull. Chem. Soc. Jpn., 1973, 46, 3291. [all data]
Occolowitz and White, 1968
Occolowitz, J.L.; White, G.L.,
Energetic considerations in the assignment of some fragment ion structures,
Australian J. Chem., 1968, 21, 997. [all data]
Lifshitz and Malinovich, 1984
Lifshitz, C.; Malinovich, Y.,
Time resolved photoionization mass spectrometry in the millisecond range,
Int. J. Mass Spectrom. Ion Processes, 1984, 60, 99. [all data]
Lifshitz, Gotchiguian, et al., 1983
Lifshitz, C.; Gotchiguian, P.; Roller, R.,
Time-dependent mass spectra and breakdown graphs. The kinetic shift in aniline,
Chem. Phys. Lett., 1983, 95, 106. [all data]
Bentley, Johnstone, et al., 1973
Bentley, T.W.; Johnstone, R.A.W.; McMaster, B.N.,
Appearance potentials of metastable and normal ions and the kinetic shift,
J. Chem. Soc., Chem. Commun., 1973, 510. [all data]
Wren, Vogelhuber, et al., 2012
Wren, S.W.; Vogelhuber, K.M.; Ichino, T.; Stanton, J.F.; Lineberger, W.C.,
Photoelectron Spectroscopy of Anilinide and Acidity of Aniline,
J. Phys. Chem. A, 2012, 116, 12, 3118-3123, https://doi.org/10.1021/jp211463r
. [all data]
Bartmess, Scott, et al., 1979
Bartmess, J.E.; Scott, J.A.; McIver, R.T., Jr.,
The gas phase acidity scale from methanol to phenol,
J. Am. Chem. Soc., 1979, 101, 6047. [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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