Dimethyl ether

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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
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 C2H6O+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
IE (evaluated)10.025 ± 0.025eVN/AN/AL
Quantity Value Units Method Reference Comment
Proton affinity (review)189.kcal/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity182.7kcal/molN/AHunter and Lias, 1998HL

Ionization energy determinations

IE (eV) Method Reference Comment
10.025 ± 0.025PIPECOButler, Holland, et al., 1984LBLHLM
9.95 ± 0.07EIBowen and Maccoll, 1984LBLHLM
10.04PEKimura, Katsumata, et al., 1981LLK
9.8 ± 0.1PEAue, Webb, et al., 1980LLK
9.8PEAue and Bowers, 1979LLK
10.01 ± 0.01PIBotter, Pechine, et al., 1977LLK
9.94 ± 0.01PECocksey, Eland, et al., 1971LLK
10.1 ± 0.2EIIvko, 1970RDSH
9.94PEDewar and Worley, 1969RDSH
9.96 ± 0.05SHernandez, 1963RDSH
10.00 ± 0.02PIWatanabe, 1957RDSH
10.0PEBajic, Humski, et al., 1985Vertical value; LBLHLM
10.1PEBieri, Asbrink, et al., 1982Vertical value; LBLHLM
11.94PEUtsunomiya, Kobayashi, et al., 1980Vertical value; LLK
10.0 ± 0.2PECarnovale, Livett, et al., 1980Vertical value; LLK
10.1PEAue and Bowers, 1979Vertical value; LLK
10.03PEKobayashi, 1978Vertical value; LLK
9.98PEBenoit and Harrison, 1977Vertical value; LLK
10.052PEAue, Webb, et al., 1975Vertical value; LLK
10.04PEBock, Mollere, et al., 1973Vertical value; LLK
10.04PECradock and Whiteford, 1972Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
CHO+≤12.85 ± 0.10H2+CH3PIPECOButler, Holland, et al., 1984T = 298K; LBLHLM
CHO+14.0 ± 0.2?EIIvko, 1970RDSH
CH3+≤14.4 ± 0.1CH2O+HPIPECOButler, Holland, et al., 1984T = 298K; LBLHLM
CH3+14.93 ± 0.13?EIHaney and Franklin, 1969RDSH
CH3O+≤11.85 ± 0.10CH3PIPECOButler, Holland, et al., 1984T = 298K; LBLHLM
CH3O+≤11.8CH3EILossing, 1977LLK
CH3O+12.4 ± 0.1CH3EIIvko, 1970RDSH
CH3O+11.95 ± 0.05CH3EIHaney and Franklin, 1969RDSH
C2H5O+11.115 ± 0.010HPIPECOButler, Holland, et al., 1984T = 0K; LBLHLM
C2H5O+10.99 ± 0.08HEIBowen and Maccoll, 1984LBLHLM
C2H5O+10.99HEILossing, 1977LLK
C2H5O+11.23 ± 0.04HEISolka and Russell, 1974LLK
C2H5O+10.70 ± 0.13HEIFinney and Harrison, 1972LLK
C2H5O+11.55 ± 0.15HEIIvko, 1970RDSH
C2H5O+11.42 ± 0.01HEIMartin, Lampe, et al., 1966RDSH

De-protonation reactions

C2H5O- + Hydrogen cation = Dimethyl ether

By formula: C2H5O- + H+ = C2H6O

Quantity Value Units Method Reference Comment
Δr407.0 ± 2.0kcal/molBranDePuy, Bierbaum, et al., 1984gas phase; B
Quantity Value Units Method Reference Comment
Δr398.2 ± 2.2kcal/molH-TSDePuy, Bierbaum, et al., 1984gas phase; B


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]

Butler, Holland, et al., 1984
Butler, J.J.; Holland, D.M.P.; Parr, A.C.; Stockbauer, R., A threshold photoelectron-photoion coincidence spectrometric study of dimethyl ether (CH3OCH3), Int. J. Mass Spectrom. Ion Processes, 1984, 58, 1. [all data]

Bowen and Maccoll, 1984
Bowen, R.D.; Maccoll, A., Low energy, low temperature mass spectra, Org. Mass Spectrom., 1984, 19, 379. [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]

Aue, Webb, et al., 1980
Aue, D.H.; Webb, H.M.; Davidson, W.R.; Vidal, M.; Bowers, M.T.; Goldwhite, H.; Vertal, L.E.; Douglas, J.E.; Kollman, P.A.; Kenyon, G.L., Proton affinities photoelectron spectra of three-membered-ring J. Heterocycl. Chem., J. Am. Chem. Soc., 1980, 102, 5151. [all data]

Aue and Bowers, 1979
Aue, D.H.; Bowers, M.T., Chapter 9. Stabilities of positive ions from equilibrium gas phase basicity measurements in Ions Chemistry,, ed. M.T. Bowers, 1979. [all data]

Botter, Pechine, et al., 1977
Botter, R.; Pechine, J.M.; Rosenstock, H.M., Photoionization of dimethyl ether and diethyl ether, Int. J. Mass Spectrom. Ion Phys., 1977, 25, 7. [all data]

Cocksey, Eland, et al., 1971
Cocksey, B.J.; Eland, J.H.D.; Danby, C.J., The effect of alkyl substitution on ionisation potential, J. Chem. Soc., 1971, (B), 790. [all data]

Ivko, 1970
Ivko, A.A., Use of mass spectroscopy and isotope labelling for determining the structure of ions and molecules, Org. Katal., 1970, 20. [all data]

Dewar and Worley, 1969
Dewar, M.J.S.; Worley, S.D., Photoelectron spectra of molecules. I. Ionization potentials of some organic molecules and their interpretation, J. Chem. Phys., 1969, 50, 654. [all data]

Hernandez, 1963
Hernandez, G.J., Vacuum ultraviolet absorption spectrum of dimethyl ether, J. Chem. Phys., 1963, 38, 1644. [all data]

Watanabe, 1957
Watanabe, K., Ionization potentials of some molecules, J. Chem. Phys., 1957, 26, 542. [all data]

Bajic, Humski, et al., 1985
Bajic, M.; Humski, K.; Klasinc, L.; Ruscic, B., Substitution effects on electronic structure of thiophene, Z. Naturforsch. B:, 1985, 40, 1214. [all data]

Bieri, Asbrink, et al., 1982
Bieri, G.; Asbrink, L.; Von Niessen, W., 30.4-nm He(II) photoelectron spectra of organic molecules, J. Electron Spectrosc. Relat. Phenom., 1982, 27, 129. [all data]

Utsunomiya, Kobayashi, et al., 1980
Utsunomiya, C.; Kobayashi, T.; Nagakura, S., Photoelectron angular distribution measurements for some aliphatic alcohols, amines, halides, Bull. Chem. Soc. Jpn., 1980, 53, 1216. [all data]

Carnovale, Livett, et al., 1980
Carnovale, F.; Livett, M.K.; Peel, J.B., The photoelectron spectrum of the dimethyl ether-hydrogen chloride complex, J. Am. Chem. Soc., 1980, 102, 569. [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]

Benoit and Harrison, 1977
Benoit, F.M.; Harrison, A.G., Predictive value of proton affinity. Ionization energy correlations involving oxygenated molecules, J. Am. Chem. Soc., 1977, 99, 3980. [all data]

Aue, Webb, et al., 1975
Aue, D.H.; Webb, H.M.; Bowers, M.T., Proton affinities, ionization potentials, and hydrogen affinities of nitrogen and oxygen bases. Hybridization effects, J. Am. Chem. Soc., 1975, 97, 4137. [all data]

Bock, Mollere, et al., 1973
Bock, H.; Mollere, P.; Becker, G.; Fritz, G., Photoelectron spectra molecular properties. XX. Dimethyl ether, methoxysilane, and disiloxane, J. Organomet. Chem., 1973, 61, 113. [all data]

Cradock and Whiteford, 1972
Cradock, S.; Whiteford, R.A., Photoelectron spectra of the methyl, silyl and germyl derivatives of the group VI elements, J. Chem. Soc. Faraday Trans. 2, 1972, 68, 281. [all data]

Haney and Franklin, 1969
Haney, M.A.; Franklin, J.L., Excess energies in mass spectra of some oxygen-containing organic compounds, J. Chem. Soc. Faraday Trans., 1969, 65, 1794. [all data]

Lossing, 1977
Lossing, F.P., Heats of formation of some isomeric [CnH2n+1]+ ions. Substitutional effects on ion stability, J. Am. Chem. Soc., 1977, 99, 7526. [all data]

Solka and Russell, 1974
Solka, B.H.; Russell, M.E., Energetics of formation of some structural isomers of gaseous C2H5O+ C2H6N+ ions, J. Phys. Chem., 1974, 78, 1268. [all data]

Finney and Harrison, 1972
Finney, C.D.; Harrison, A.G., A third-derivative method for determining electron-impact onset potentials, Int. J. Mass Spectrom. Ion Phys., 1972, 9, 221. [all data]

Martin, Lampe, et al., 1966
Martin, R.H.; Lampe, F.W.; Taft, R.W., An electron-impact study of ionization and dissociation in methoxy- and halogen- substituted methanes, J. Am. Chem. Soc., 1966, 88, 1353. [all data]

DePuy, Bierbaum, et al., 1984
DePuy, C.H.; Bierbaum, V.M.; Damrauer, R., Relative Gas-Phase Acidities of the Alkanes, J. Am. Chem. Soc., 1984, 106, 4051. [all data]


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