Methyl cation


Reaction thermochemistry data

Go To: Top, Gas phase ion energetics data, Ion clustering data, References, Notes

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:
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
B - John E. Bartmess

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

Methyl cation + Xenon = (Methyl cation • Xenon)

By formula: CH3+ + Xe = (CH3+ • Xe)

Quantity Value Units Method Reference Comment
Δr50.9kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M
Δr55.2 ± 2.5kcal/molICRHovey and McMahon, 1986gas phase; switching reaction(CH3+)CH3F, Entropy change calculated or estimated; M

Methyl cation + Krypton = (Methyl cation • Krypton)

By formula: CH3+ + Kr = (CH3+ • Kr)

Quantity Value Units Method Reference Comment
Δr44.0kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M
Δr47.7 ± 2.5kcal/molICRHovey and McMahon, 1987gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated; M

CH2- + Hydrogen cation = Methyl cation

By formula: CH2- + H+ = CH3+

Quantity Value Units Method Reference Comment
Δr409.11 ± 0.41kcal/molD-EALeopold, Murray, et al., 1985gas phase; Singlet-triplet splitting of CH2 = 9.0 kcal; B
Quantity Value Units Method Reference Comment
Δr401.42 ± 0.48kcal/molH-TSLeopold, Murray, et al., 1985gas phase; Singlet-triplet splitting of CH2 = 9.0 kcal; B

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

By formula: CH3+ + N2O = (CH3+ • N2O)

Quantity Value Units Method Reference Comment
Δr52.9kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

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

By formula: CH3+ + HBr = (CH3+ • HBr)

Quantity Value Units Method Reference Comment
Δr55.4kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

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

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

Quantity Value Units Method Reference Comment
Δr60.0kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

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

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

Quantity Value Units Method Reference Comment
Δr55.3kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

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

By formula: CH3+ + O2S = (CH3+ • O2S)

Quantity Value Units Method Reference Comment
Δr60.6kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

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

By formula: CH3+ + HCl = (CH3+ • HCl)

Quantity Value Units Method Reference Comment
Δr51.7kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

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

By formula: CH3+ + F3N = (CH3+ • F3N)

Quantity Value Units Method Reference Comment
Δr53.6kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

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

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

Quantity Value Units Method Reference Comment
Δr62.1kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

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

By formula: CH3+ + CO2 = (CH3+ • CO2)

Quantity Value Units Method Reference Comment
Δr49.4kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

Methyl cation + C2ClF3O = (Methyl cation • C2ClF3O)

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

Quantity Value Units Method Reference Comment
Δr60.1kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

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

By formula: CH3+ + COS = (CH3+ • COS)

Quantity Value Units Method Reference Comment
Δr57.2kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

Methyl cation + Methyl fluoride = (Methyl cation • Methyl fluoride)

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

Quantity Value Units Method Reference Comment
Δr54.9kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

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

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

Quantity Value Units Method Reference Comment
Δr58.5kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

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

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

Quantity Value Units Method Reference Comment
Δr63.3kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

Methyl cation + Chloromethane = (Methyl cation • Chloromethane)

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

Quantity Value Units Method Reference Comment
Δr62.0kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

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

By formula: CH3+ + CS2 = (CH3+ • CS2)

Quantity Value Units Method Reference Comment
Δr60.2kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

Methyl cation + Bromotrifluoromethane = (Methyl cation • Bromotrifluoromethane)

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

Quantity Value Units Method Reference Comment
Δr53.6kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

Methyl cation + Chlorotrifluoromethane = (Methyl cation • Chlorotrifluoromethane)

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

Quantity Value Units Method Reference Comment
Δr52.9kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

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

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

Quantity Value Units Method Reference Comment
Δr2.0 ± 0.2kcal/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr22.3cal/mol*KPHPMSHiraoka, Kudaka, et al., 1991gas phase; M

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

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

Quantity Value Units Method Reference Comment
Δr2.0 ± 0.2kcal/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr21.1cal/mol*KPHPMSHiraoka, Kudaka, et al., 1991gas phase; M

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

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

Quantity Value Units Method Reference Comment
Δr1.9 ± 0.2kcal/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr20.6cal/mol*KPHPMSHiraoka, Kudaka, et al., 1991gas phase; M

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

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

Quantity Value Units Method Reference Comment
Δr1.9 ± 0.3kcal/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr21.0cal/mol*KPHPMSHiraoka, Kudaka, et al., 1991gas phase; M

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

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

Quantity Value Units Method Reference Comment
Δr1.9 ± 0.4kcal/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr21.2cal/mol*KPHPMSHiraoka, Kudaka, et al., 1991gas phase; M

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

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

Quantity Value Units Method Reference Comment
Δr2.3 ± 0.2kcal/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr15.7cal/mol*KPHPMSHiraoka, Kudaka, et al., 1991gas phase; M

Methyl cation + Argon = (Methyl cation • Argon)

By formula: CH3+ + Ar = (CH3+ • Ar)

Quantity Value Units Method Reference Comment
Δr11.3 ± 2.0kcal/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr20.1cal/mol*KPHPMSHiraoka, Kudaka, et al., 1991gas phase; M

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

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

Quantity Value Units Method Reference Comment
Δr77.kcal/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 + Ethyl Chloride = (Methyl cation • Ethyl Chloride)

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

Quantity Value Units Method Reference Comment
Δr71.kcal/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 + Propane, 2-chloro-2-methyl- = (Methyl cation • Propane, 2-chloro-2-methyl-)

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

Quantity Value Units Method Reference Comment
Δr81.kcal/molPHPMSSharma, Meza de Hojer, et al., 1985gas phase; from t-C4H9+ + CH3Cl; Cox and Pilcher, 1970, Rosenstock, Buff, et al., 1982; M

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

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

Quantity Value Units Method Reference Comment
Δr1.93kcal/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; Entropy change calculated or estimated; M

Methyl cation + Nitrogen = (Methyl cation • Nitrogen)

By formula: CH3+ + N2 = (CH3+ • N2)

Quantity Value Units Method Reference Comment
Δr48.4kcal/molPDissFoster, Williamson, et al., 1974gas phase; M

Gas phase ion energetics data

Go To: Top, Reaction thermochemistry data, Ion clustering data, References, Notes

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

Data compiled by: John E. Bartmess

De-protonation reactions

CH2- + Hydrogen cation = Methyl cation

By formula: CH2- + H+ = CH3+

Quantity Value Units Method Reference Comment
Δr409.11 ± 0.41kcal/molD-EALeopold, Murray, et al., 1985gas phase; Singlet-triplet splitting of CH2 = 9.0 kcal
Quantity Value Units Method Reference Comment
Δr401.42 ± 0.48kcal/molH-TSLeopold, Murray, et al., 1985gas phase; Singlet-triplet splitting of CH2 = 9.0 kcal

Ion clustering data

Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, References, Notes

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
Δr409.11 ± 0.41kcal/molD-EALeopold, Murray, et al., 1985gas phase; Singlet-triplet splitting of CH2 = 9.0 kcal; B
Quantity Value Units Method Reference Comment
Δr401.42 ± 0.48kcal/molH-TSLeopold, Murray, et al., 1985gas phase; Singlet-triplet splitting of CH2 = 9.0 kcal; B

Methyl cation + Argon = (Methyl cation • Argon)

By formula: CH3+ + Ar = (CH3+ • Ar)

Quantity Value Units Method Reference Comment
Δr11.3 ± 2.0kcal/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr20.1cal/mol*KPHPMSHiraoka, Kudaka, et al., 1991gas phase; M

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

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

Quantity Value Units Method Reference Comment
Δr2.3 ± 0.2kcal/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr15.7cal/mol*KPHPMSHiraoka, Kudaka, et al., 1991gas phase; M

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

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

Quantity Value Units Method Reference Comment
Δr2.0 ± 0.2kcal/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr22.3cal/mol*KPHPMSHiraoka, Kudaka, et al., 1991gas phase; M

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

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

Quantity Value Units Method Reference Comment
Δr2.0 ± 0.2kcal/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr21.1cal/mol*KPHPMSHiraoka, Kudaka, et al., 1991gas phase; M

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

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

Quantity Value Units Method Reference Comment
Δr1.9 ± 0.2kcal/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr20.6cal/mol*KPHPMSHiraoka, Kudaka, et al., 1991gas phase; M

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

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

Quantity Value Units Method Reference Comment
Δr1.9 ± 0.3kcal/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr21.0cal/mol*KPHPMSHiraoka, Kudaka, et al., 1991gas phase; M

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

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

Quantity Value Units Method Reference Comment
Δr1.9 ± 0.4kcal/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; M
Quantity Value Units Method Reference Comment
Δr21.2cal/mol*KPHPMSHiraoka, Kudaka, et al., 1991gas phase; M

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

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

Quantity Value Units Method Reference Comment
Δr1.93kcal/molPHPMSHiraoka, Kudaka, et al., 1991gas phase; Entropy change calculated or estimated; M

Methyl cation + Bromotrifluoromethane = (Methyl cation • Bromotrifluoromethane)

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

Quantity Value Units Method Reference Comment
Δr53.6kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

Methyl cation + Chlorotrifluoromethane = (Methyl cation • Chlorotrifluoromethane)

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

Quantity Value Units Method Reference Comment
Δr52.9kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

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

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

Quantity Value Units Method Reference Comment
Δr60.0kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

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

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

Quantity Value Units Method Reference Comment
Δr63.3kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

Methyl cation + Chloromethane = (Methyl cation • Chloromethane)

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

Quantity Value Units Method Reference Comment
Δr62.0kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

Methyl cation + Methyl fluoride = (Methyl cation • Methyl fluoride)

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

Quantity Value Units Method Reference Comment
Δr54.9kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

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

By formula: CH3+ + COS = (CH3+ • COS)

Quantity Value Units Method Reference Comment
Δr57.2kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

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

By formula: CH3+ + CO2 = (CH3+ • CO2)

Quantity Value Units Method Reference Comment
Δr49.4kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

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

By formula: CH3+ + CS2 = (CH3+ • CS2)

Quantity Value Units Method Reference Comment
Δr60.2kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

Methyl cation + C2ClF3O = (Methyl cation • C2ClF3O)

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

Quantity Value Units Method Reference Comment
Δr60.1kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

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

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

Quantity Value Units Method Reference Comment
Δr71.kcal/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 • 2-Propanone, 1,1,1,3,3,3-hexafluoro-)

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

Quantity Value Units Method Reference Comment
Δr58.5kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

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

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

Quantity Value Units Method Reference Comment
Δr77.kcal/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 • Propane, 2-chloro-2-methyl-)

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

Quantity Value Units Method Reference Comment
Δr81.kcal/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 • sulphuryl dichloride)

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

Quantity Value Units Method Reference Comment
Δr62.1kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

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

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

Quantity Value Units Method Reference Comment
Δr55.3kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

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

By formula: CH3+ + F3N = (CH3+ • F3N)

Quantity Value Units Method Reference Comment
Δr53.6kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

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

By formula: CH3+ + HBr = (CH3+ • HBr)

Quantity Value Units Method Reference Comment
Δr55.4kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

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

By formula: CH3+ + HCl = (CH3+ • HCl)

Quantity Value Units Method Reference Comment
Δr51.7kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

Methyl cation + Krypton = (Methyl cation • Krypton)

By formula: CH3+ + Kr = (CH3+ • Kr)

Quantity Value Units Method Reference Comment
Δr44.0kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M
Δr47.7 ± 2.5kcal/molICRHovey and McMahon, 1987gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated; M

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

By formula: CH3+ + N2O = (CH3+ • N2O)

Quantity Value Units Method Reference Comment
Δr52.9kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

Methyl cation + Nitrogen = (Methyl cation • Nitrogen)

By formula: CH3+ + N2 = (CH3+ • N2)

Quantity Value Units Method Reference Comment
Δr48.4kcal/molPDissFoster, Williamson, et al., 1974gas phase; M

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

By formula: CH3+ + O2S = (CH3+ • O2S)

Quantity Value Units Method Reference Comment
Δr60.6kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

Methyl cation + Xenon = (Methyl cation • Xenon)

By formula: CH3+ + Xe = (CH3+ • Xe)

Quantity Value Units Method Reference Comment
Δr50.9kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M
Δr55.2 ± 2.5kcal/molICRHovey and McMahon, 1986gas phase; switching reaction(CH3+)CH3F, Entropy change calculated or estimated; M

References

Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, Notes

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

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]

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]

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]

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]

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]


Notes

Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, References