Benzene, 1-methoxy-4-methyl-
- Formula: C8H10O
- Molecular weight: 122.1644
- IUPAC Standard InChIKey: CHLICZRVGGXEOD-UHFFFAOYSA-N
- CAS Registry Number: 104-93-8
- 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: Anisole, p-methyl-; p-Cresol methyl ether; p-Methoxytoluene; p-Methylanisole; p-Tolyl methyl ether; Methyl p-tolyl ether; 1-Methoxy-4-methylbenzene; 4-Methoxytoluene; 4-Methylanisole; p-Cresyl methyl ether; Methyl p-cresyl ether; Methyl 4-methylphenyl ether; 1-Methyl-4-methoxybenzene; 4-Methyl-1-methoxybenzene; 4-Methylphenol methyl ether; Methyl p-methylphenyl ether; 4-Methylmethoxybenzene; para-Methyl anisol; para-Methyl anisole; p-Methylanisol; NSC 6254; 4-Methylanisol
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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:
MM - Michael M. Meot-Ner (Mautner)
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 C8H10O+ (ion structure unspecified)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
IE (evaluated) | 7.90 ± 0.05 | eV | N/A | N/A | L |
Proton affinity at 298K
Proton affinity (kcal/mol) | Reference | Comment |
---|---|---|
201. ± 2. | van Beelen, Koblenz, et al., 2004 | T = 298K; PA derived by authors from GB with protonation entropy equated to Rlnσ(B)/σ(BH+); MM |
Gas basicity at 298K
Gas basicity (review) (kcal/mol) | Reference | Comment |
---|---|---|
193. ± 2. | van Beelen, Koblenz, et al., 2004 | T = 298K; PA derived by authors from GB with protonation entropy equated to Rlnσ(B)/σ(BH+); MM |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
7.90 ± 0.03 | PI | Ponomarev, Arapov, et al., 1986 | LBLHLM |
7.85 | EI | Cooks, Bertrand, et al., 1973 | LLK |
7.91 | CTS | Pitt, Carey, et al., 1972 | LLK |
7.83 | EI | Hoffman and Bursey, 1971 | LLK |
8.3 ± 0.1 | EI | Brown, 1970 | RDSH |
8.0 ± 0.15 | CTS | Voigt and Reid, 1964 | RDSH |
8.14 ± 0.01 | PE | Bernardi, Distefano, et al., 1975 | Vertical value; LLK |
8.18 | PE | Kobayashi and Nagakura, 1974 | Vertical value; LLK |
8.17 | PE | Eaton and Traylor, 1974 | Vertical value; LLK |
8.16 | PE | Dewar, Ernstbrunner, et al., 1974 | Vertical value; LLK |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
C6H7+ | 12.9 | ? | EI | Harrison, Haynes, et al., 1965 | RDSH |
C7H7+ | 12.59 | ? | EI | Hoffman and Bursey, 1971 | LLK |
C7H7O+ | 11.36 ± 0.05 | CH3 | PI | Ponomarev, Arapov, et al., 1986 | LBLHLM |
C7H7O+ | 11.5 ± 0.1 | CH3 | EI | Brown, 1970 | RDSH |
C7H7O+ | 10.8 ± 0.1 | CH3 | EI | Tait, Shannon, et al., 1962 | RDSH |
C7H8+ | 11.23 | HCHO | EI | Cooks, Bertrand, et al., 1973 | LLK |
C7H8+ | 11.1 ± 0.1 | CH2O | EI | Brown, 1970 | RDSH |
C8H9O+ | 11.91 | H | EI | Hoffman and Bursey, 1971 | LLK |
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.
van Beelen, Koblenz, et al., 2004
van Beelen, E.S.E.; Koblenz, T.A.; Ingemann, S.; Hammerum, S.,
Experimental and theoretical evaluation of proton affinities of furan, the methylphenols, and the related anisoles,
J. Phys. Chem. A, 2004, 108, 2787. [all data]
Ponomarev, Arapov, et al., 1986
Ponomarev, D.A.; Arapov, O.V.; Sergeev, Y.L.; Chistyakov, A.B.,
[Title unavailable],
Izv. Vyssh. Uchebn. Zaved., Khim. Khim. Tekhnol., 1986, 29, 107. [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]
Pitt, Carey, et al., 1972
Pitt, C.G.; Carey, R.N.; Toren, E.C.,
Nature of the electronic interactions in aryl-substituted polysilanes,
J. Am. Chem. Soc., 1972, 94, 3806. [all data]
Hoffman and Bursey, 1971
Hoffman, M.K.; Bursey, M.M.,
Structural characteristics of non-decomposing C7H7+ ions from some methyl ethers on electron impact,
Chem. Commun., 1971, 824. [all data]
Brown, 1970
Brown, P.,
Kinetic studies in mass spectrometry. VIII. Competing [M-CH3] and [M-CH2O] reactions in substituted anisoles. Approximate activation energies from ionization appearance potentials,
Org. Mass Spectrom., 1970, 4, 519. [all data]
Voigt and Reid, 1964
Voigt, E.M.; Reid, C.,
Ionization potentials of substituted benzenes and their charge-transfer spectra with tetracyanoethylene,
J. Am. Chem. Soc., 1964, 86, 3930. [all data]
Bernardi, Distefano, et al., 1975
Bernardi, F.; Distefano, G.; Mangini, A.; Pignataro, S.; Spunta, G.,
Photoelectron spectra of substituted anisoles thioanisoles,
J. Electron Spectrosc. Relat. Phenom., 1975, 7, 457. [all data]
Kobayashi and Nagakura, 1974
Kobayashi, T.; Nagakura, S.,
Photoelectron spectra of substituted benzenes,
Bull. Chem. Soc. Jpn., 1974, 47, 2563. [all data]
Eaton and Traylor, 1974
Eaton, D.F.; Traylor, T.G.,
Distortional stabilization in phenyl participations,
J. Am. Chem. Soc., 1974, 96, 7109. [all data]
Dewar, Ernstbrunner, et al., 1974
Dewar, P.S.; Ernstbrunner, E.; Gilmore, J.R.; Godfrey, M.; Mellor, J.M.,
Conformational analysis of alkyl aryl ethers and alkyl aryl sulphides by photoelectron spectroscopy,
Tetrahedron, 1974, 30, 2455. [all data]
Harrison, Haynes, et al., 1965
Harrison, A.G.; Haynes, P.; McLean, S.; Meyer, F.,
The mass spectra of methyl-substituted cyclopentadienes,
J. Am. Chem. Soc., 1965, 87, 5099. [all data]
Tait, Shannon, et al., 1962
Tait, J.M.S.; Shannon, T.W.; Harrison, A.G.,
The structure of substituted C7 ions from benzyl derivatives at the appearance potential threshold,
J. Am. Chem. Soc., 1962, 84, 4. [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 - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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