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Methyl cation


Ion clustering 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 compiled as indicated in comments:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.

Clustering reactions

CH2- + Hydrogen cation = Methyl cation

By formula: CH2- + H+ = CH3+

Quantity Value Units Method Reference Comment
Deltar1711.7 ± 1.7kJ/molD-EALeopold, Murray, et al., 1985gas phase; Singlet-triplet splitting of CH2 = 9.0 kcal; B
Quantity Value Units Method Reference Comment
Deltar1679.5 ± 2.0kJ/molH-TSLeopold, Murray, et al., 1985gas phase; Singlet-triplet splitting of CH2 = 9.0 kcal; B

Methyl cation + Argon = (Methyl cation bullet Argon)

By formula: CH3+ + Ar = (CH3+ bullet Ar)

Quantity Value Units Method Reference Comment
Deltar47.3 ± 8.4kJ/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; M
Quantity Value Units Method Reference Comment
Deltar84.1J/mol*KPHPMSHiraoka, Kudaka, et al., 1991gas phase; M

(Methyl cation bullet Argon) + Argon = (Methyl cation bullet 2Argon)

By formula: (CH3+ bullet Ar) + Ar = (CH3+ bullet 2Ar)

Quantity Value Units Method Reference Comment
Deltar9.5 ± 0.8kJ/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; M
Quantity Value Units Method Reference Comment
Deltar65.7J/mol*KPHPMSHiraoka, Kudaka, et al., 1991gas phase; M

(Methyl cation bullet 2Argon) + Argon = (Methyl cation bullet 3Argon)

By formula: (CH3+ bullet 2Ar) + Ar = (CH3+ bullet 3Ar)

Quantity Value Units Method Reference Comment
Deltar8.2 ± 0.8kJ/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; M
Quantity Value Units Method Reference Comment
Deltar93.3J/mol*KPHPMSHiraoka, Kudaka, et al., 1991gas phase; M

(Methyl cation bullet 3Argon) + Argon = (Methyl cation bullet 4Argon)

By formula: (CH3+ bullet 3Ar) + Ar = (CH3+ bullet 4Ar)

Quantity Value Units Method Reference Comment
Deltar8.2 ± 0.8kJ/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; M
Quantity Value Units Method Reference Comment
Deltar88.3J/mol*KPHPMSHiraoka, Kudaka, et al., 1991gas phase; M

(Methyl cation bullet 4Argon) + Argon = (Methyl cation bullet 5Argon)

By formula: (CH3+ bullet 4Ar) + Ar = (CH3+ bullet 5Ar)

Quantity Value Units Method Reference Comment
Deltar8.1 ± 0.8kJ/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; M
Quantity Value Units Method Reference Comment
Deltar86.2J/mol*KPHPMSHiraoka, Kudaka, et al., 1991gas phase; M

(Methyl cation bullet 5Argon) + Argon = (Methyl cation bullet 6Argon)

By formula: (CH3+ bullet 5Ar) + Ar = (CH3+ bullet 6Ar)

Quantity Value Units Method Reference Comment
Deltar8. ± 1.kJ/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; M
Quantity Value Units Method Reference Comment
Deltar87.9J/mol*KPHPMSHiraoka, Kudaka, et al., 1991gas phase; M

(Methyl cation bullet 6Argon) + Argon = (Methyl cation bullet 7Argon)

By formula: (CH3+ bullet 6Ar) + Ar = (CH3+ bullet 7Ar)

Quantity Value Units Method Reference Comment
Deltar8. ± 2.kJ/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; M
Quantity Value Units Method Reference Comment
Deltar88.7J/mol*KPHPMSHiraoka, Kudaka, et al., 1991gas phase; M

(Methyl cation bullet 7Argon) + Argon = (Methyl cation bullet 8Argon)

By formula: (CH3+ bullet 7Ar) + Ar = (CH3+ bullet 8Ar)

Quantity Value Units Method Reference Comment
Deltar8.08kJ/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; Entropy change calculated or estimated; M

Methyl cation + Bromotrifluoromethane = (Methyl cation bullet Bromotrifluoromethane)

By formula: CH3+ + CBrF3 = (CH3+ bullet CBrF3)

Quantity Value Units Method Reference Comment
Deltar224.kJ/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 202. kJ/mol; Foster, Williamson, et al., 1974; M

Methyl cation + Chlorotrifluoromethane = (Methyl cation bullet Chlorotrifluoromethane)

By formula: CH3+ + CClF3 = (CH3+ bullet CClF3)

Quantity Value Units Method Reference Comment
Deltar221.kJ/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 202. kJ/mol; Foster, Williamson, et al., 1974; M

Methyl cation + Methane, trifluoroiodo- = (Methyl cation bullet Methane, trifluoroiodo-)

By formula: CH3+ + CF3I = (CH3+ bullet CF3I)

Quantity Value Units Method Reference Comment
Deltar251.kJ/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 202. kJ/mol; Foster, Williamson, et al., 1974; M

Methyl cation + Methane, bromo- = (Methyl cation bullet Methane, bromo-)

By formula: CH3+ + CH3Br = (CH3+ bullet CH3Br)

Quantity Value Units Method Reference Comment
Deltar265.kJ/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 202. kJ/mol; Foster, Williamson, et al., 1974; M

Methyl cation + Chloromethane = (Methyl cation bullet Chloromethane)

By formula: CH3+ + CH3Cl = (CH3+ bullet CH3Cl)

Quantity Value Units Method Reference Comment
Deltar259.kJ/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 202. kJ/mol; Foster, Williamson, et al., 1974; M

Methyl cation + Methyl fluoride = (Methyl cation bullet Methyl fluoride)

By formula: CH3+ + CH3F = (CH3+ bullet CH3F)

Quantity Value Units Method Reference Comment
Deltar230.kJ/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 202. kJ/mol; Foster, Williamson, et al., 1974; M

Methyl cation + Carbonyl sulfide = (Methyl cation bullet Carbonyl sulfide)

By formula: CH3+ + COS = (CH3+ bullet COS)

Quantity Value Units Method Reference Comment
Deltar239.kJ/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 202. kJ/mol; Foster, Williamson, et al., 1974; M

Methyl cation + Carbon dioxide = (Methyl cation bullet Carbon dioxide)

By formula: CH3+ + CO2 = (CH3+ bullet CO2)

Quantity Value Units Method Reference Comment
Deltar207.kJ/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 202. kJ/mol; Foster, Williamson, et al., 1974; M

Methyl cation + Carbon disulfide = (Methyl cation bullet Carbon disulfide)

By formula: CH3+ + CS2 = (CH3+ bullet CS2)

Quantity Value Units Method Reference Comment
Deltar252.kJ/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 202. kJ/mol; Foster, Williamson, et al., 1974; M

Methyl cation + C2ClF3O = (Methyl cation bullet C2ClF3O)

By formula: CH3+ + C2ClF3O = (CH3+ bullet C2ClF3O)

Quantity Value Units Method Reference Comment
Deltar251.kJ/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 202. kJ/mol; Foster, Williamson, et al., 1974; M

Methyl cation + Ethyl Chloride = (Methyl cation bullet Ethyl Chloride)

By formula: CH3+ + C2H5Cl = (CH3+ bullet C2H5Cl)

Quantity Value Units Method Reference Comment
Deltar300.kJ/molPHPMSSharma, Meza de Hojer, et al., 1985gas phase; from Et+ + CH3Cl; Cox and Pilcher, 1970, Rosenstock, Buff, et al., 1982; Sen Sharma and Kebarle, 1978; M

Methyl cation + 2-Propanone, 1,1,1,3,3,3-hexafluoro- = (Methyl cation bullet 2-Propanone, 1,1,1,3,3,3-hexafluoro-)

By formula: CH3+ + C3F6O = (CH3+ bullet C3F6O)

Quantity Value Units Method Reference Comment
Deltar245.kJ/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 202. kJ/mol; Foster, Williamson, et al., 1974; M

Methyl cation + Propane, 2-chloro- = (Methyl cation bullet Propane, 2-chloro-)

By formula: CH3+ + C3H7Cl = (CH3+ bullet C3H7Cl)

Quantity Value Units Method Reference Comment
Deltar320.kJ/molPHPMSSharma, Meza de Hojer, et al., 1985gas phase; from i-C3H7+ + CH3Cl; Cox and Pilcher, 1970, Rosenstock, Buff, et al., 1982, Sen Sharma and Kebarle, 1978; M

Methyl cation + Propane, 2-chloro-2-methyl- = (Methyl cation bullet Propane, 2-chloro-2-methyl-)

By formula: CH3+ + C4H9Cl = (CH3+ bullet C4H9Cl)

Quantity Value Units Method Reference Comment
Deltar340.kJ/molPHPMSSharma, Meza de Hojer, et al., 1985gas phase; from t-C4H9+ + CH3Cl; Cox and Pilcher, 1970, Rosenstock, Buff, et al., 1982; M

Methyl cation + sulphuryl dichloride = (Methyl cation bullet sulphuryl dichloride)

By formula: CH3+ + Cl2O2S = (CH3+ bullet Cl2O2S)

Quantity Value Units Method Reference Comment
Deltar260.kJ/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 202. kJ/mol; Foster, Williamson, et al., 1974; M

Methyl cation + Sulfuryl fluoride = (Methyl cation bullet Sulfuryl fluoride)

By formula: CH3+ + F2O2S = (CH3+ bullet F2O2S)

Quantity Value Units Method Reference Comment
Deltar231.kJ/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 202. kJ/mol; Foster, Williamson, et al., 1974; M

Methyl cation + Nitrogen trifluoride = (Methyl cation bullet Nitrogen trifluoride)

By formula: CH3+ + F3N = (CH3+ bullet F3N)

Quantity Value Units Method Reference Comment
Deltar224.kJ/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 202. kJ/mol; Foster, Williamson, et al., 1974; M

Methyl cation + Hydrogen bromide = (Methyl cation bullet Hydrogen bromide)

By formula: CH3+ + HBr = (CH3+ bullet HBr)

Quantity Value Units Method Reference Comment
Deltar232.kJ/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 202. kJ/mol; Foster, Williamson, et al., 1974; M

Methyl cation + Hydrogen chloride = (Methyl cation bullet Hydrogen chloride)

By formula: CH3+ + HCl = (CH3+ bullet HCl)

Quantity Value Units Method Reference Comment
Deltar216.kJ/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 202. kJ/mol; Foster, Williamson, et al., 1974; M

Methyl cation + Krypton = (Methyl cation bullet Krypton)

By formula: CH3+ + Kr = (CH3+ bullet Kr)

Quantity Value Units Method Reference Comment
Deltar184.kJ/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 202. kJ/mol; Foster, Williamson, et al., 1974; M
Deltar200. ± 10.kJ/molICRHovey and McMahon, 1987gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated; M

Methyl cation + Nitrous oxide = (Methyl cation bullet Nitrous oxide)

By formula: CH3+ + N2O = (CH3+ bullet N2O)

Quantity Value Units Method Reference Comment
Deltar221.kJ/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 202. kJ/mol; Foster, Williamson, et al., 1974; M

Methyl cation + Nitrogen = (Methyl cation bullet Nitrogen)

By formula: CH3+ + N2 = (CH3+ bullet N2)

Quantity Value Units Method Reference Comment
Deltar203.kJ/molPDissFoster, Williamson, et al., 1974gas phase; M

Methyl cation + Sulfur dioxide = (Methyl cation bullet Sulfur dioxide)

By formula: CH3+ + O2S = (CH3+ bullet O2S)

Quantity Value Units Method Reference Comment
Deltar254.kJ/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 202. kJ/mol; Foster, Williamson, et al., 1974; M

Methyl cation + Xenon = (Methyl cation bullet Xenon)

By formula: CH3+ + Xe = (CH3+ bullet Xe)

Quantity Value Units Method Reference Comment
Deltar213.kJ/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 202. kJ/mol; Foster, Williamson, et al., 1974; M
Deltar231. ± 10.kJ/molICRHovey and McMahon, 1986gas phase; switching reaction(CH3+)CH3F, Entropy change calculated or estimated; M

References

Go To: Top, Ion clustering data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Leopold, Murray, et al., 1985
Leopold, D.G.; Murray, K.K.; Miller, A.E.S.; Lineberger, W.C., Methylene: A study of the X3B1 and the 1A1 states by photoelectron spectroscopy of CH2- and CD2-, J. Chem. Phys., 1985, 83, 4849. [all data]

Hiraoka, Kudaka, et al., 1991
Hiraoka, K.; Kudaka, I.; Yamabe, S., A Charge-Transfer Complex CH3+ Ar in the Gas Phase, Chem. Phys. Lett., 1991, 178, 1, 103, https://doi.org/10.1016/0009-2614(91)85060-A . [all data]

McMahon, Heinis, et al., 1988
McMahon, T.; Heinis, T.; Nicol, G.; Hovey, J.K.; Kebarle, P., Methyl Cation Affinities, J. Am. Chem. Soc., 1988, 110, 23, 7591, https://doi.org/10.1021/ja00231a002 . [all data]

Foster, Williamson, et al., 1974
Foster, M.S.; Williamson, A.D.; Beauchamp, J.L., Photoionization mass spectrometry of trans-azomethane, Int. J. Mass Spectrom. Ion Phys., 1974, 15, 429. [all data]

Sharma, Meza de Hojer, et al., 1985
Sharma, D.M.S.; Meza de Hojer, S.; Kebarle, P., Stabilities of halonium ions from a study of gas-phase equilibria R+ + XR' = (RXR')+, J. Am. Chem. Soc., 1985, 107, 13, 3757, https://doi.org/10.1021/ja00299a002 . [all data]

Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds in Academic Press, New York, 1970. [all data]

Rosenstock, Buff, et al., 1982
Rosenstock, H.M.; Buff, R.; Ferreira, M.A.A.; Lias, S.G.; Parr, A.C.; Stockbauer, R.L.; Holmes, J.L., Fragmentation mechanism and energetics of some alkyl halide ions, J. Am. Chem. Soc., 1982, 104, 2337. [all data]

Sen Sharma and Kebarle, 1978
Sen Sharma, D.K.; Kebarle, P., Binding Energies and Stabilities of Chloronium Ions from Study of the Gas - Phase Equilibria: R1+ + ClR2 = R1ClR2+, J. Am. Chem. Soc., 1978, 100, 18, 5826, https://doi.org/10.1021/ja00486a039 . [all data]

Hovey and McMahon, 1987
Hovey, J.K.; McMahon, T.B., Bond Strength in the Methylkryptonium Ion Determined from Ion Cyclotron Resonance Methyl Cation Exchange Equilibria, J. Phys. Chem., 1987, 91, 17, 4560, https://doi.org/10.1021/j100301a028 . [all data]

Hovey and McMahon, 1986
Hovey, J.K.; McMahon, T.B., C-Xe Bond strength in the methylxenonium cation determined from ion cyclotron resonance methyl cation exchange equilibria, J. Am. Chem. Soc., 1986, 108, 528. [all data]


Notes

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