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Methane, bromo-

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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

Bromine anion + Methane, bromo- = (Bromine anion bullet Methane, bromo-)

By formula: Br- + CH3Br = (Br- bullet CH3Br)

Quantity Value Units Method Reference Comment
Deltar11.2 ± 1.0kcal/molTDAsLi, Ross, et al., 1996gas phase; B
Deltar9.20 ± 0.50kcal/molTDAsDougherty and Roberts, 1974gas phase; B,M
Quantity Value Units Method Reference Comment
Deltar14.0cal/mol*KHPMSDougherty and Roberts, 1974gas phase; M
Quantity Value Units Method Reference Comment
Deltar4.60 ± 0.20kcal/molTDAsLi, Ross, et al., 1996gas phase; B
Deltar5.00 ± 0.80kcal/molTDAsDougherty and Roberts, 1974gas phase; B

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

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

Quantity Value Units Method Reference Comment
Deltar63.3kcal/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

CH6N+ + Methane, bromo- = (CH6N+ bullet Methane, bromo-)

By formula: CH6N+ + CH3Br = (CH6N+ bullet CH3Br)

Quantity Value Units Method Reference Comment
Deltar11.2kcal/molPHPMSMeot-Ner, 1984gas phase; M
Quantity Value Units Method Reference Comment
Deltar21.0cal/mol*KPHPMSMeot-Ner, 1984gas phase; M

Chlorine anion + Methane, bromo- = (Chlorine anion bullet Methane, bromo-)

By formula: Cl- + CH3Br = (Cl- bullet CH3Br)

Quantity Value Units Method Reference Comment
Deltar12.5 ± 1.0kcal/molTDAsLi, Ross, et al., 1996gas phase; B
Deltar10.90 ± 0.50kcal/molTDAsDougherty and Roberts, 1974gas phase; B,M
Deltar12.2 ± 3.0kcal/molIMRBRiveros, Breda, et al., 1973gas phase; Anchored: Larson and McMahon, 1984; B
Quantity Value Units Method Reference Comment
Deltar12.8cal/mol*KHPMSDougherty and Roberts, 1974gas phase; Entropy change is questionable; M
Quantity Value Units Method Reference Comment
Deltar6.80 ± 0.20kcal/molTDAsLi, Ross, et al., 1996gas phase; B
Deltar7.1 ± 1.2kcal/molTDAsDougherty and Roberts, 1974gas phase; B

Iodide + Methane, bromo- = (Iodide bullet Methane, bromo-)

By formula: I- + CH3Br = (I- bullet CH3Br)

Quantity Value Units Method Reference Comment
Deltar8.30 ± 0.20kcal/molN/AVan Duzor, Wei, et al., 2010gas phase; B
Deltar8.30 ± 0.50kcal/molPDisCyr, Bishea, et al., 1992gas phase; B

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.

Li, Ross, et al., 1996
Li, C.; Ross, P.; Szulejko, J.; McMahon, T.B., High-Pressure Mass Spectrometric Investigations of the Potential Energy Surfaces of Gas-Phase Sn2 Reactions., J. Am. Chem. Soc., 1996, 118, 39, 9360, https://doi.org/10.1021/ja960565o . [all data]

Dougherty and Roberts, 1974
Dougherty, R.C.; Roberts, J.D., SN2 reactions in the gas phase. Nucleophilicity effects, Org. Mass Spectrom., 1974, 8, 81. [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]

Meot-Ner, 1984
Meot-Ner, (Mautner)M., The Ionic Hydrogen Bond and Ion Solvation. 1. -NH+ O-, -NH+ N- and -OH+ O- Bonds. Correlations with Proton Affinity. Deviations Due to Structural Effects, J. Am. Chem. Soc., 1984, 106, 5, 1257, https://doi.org/10.1021/ja00317a015 . [all data]

Riveros, Breda, et al., 1973
Riveros, J.M.; Breda, A.C.; Blair, L.K., Formation and relative stability of chloride ion clusters in the gas phase by ICR spectroscopy, J. Am. Chem. Soc., 1973, 95, 4066. [all data]

Larson and McMahon, 1984
Larson, J.W.; McMahon, T.B., Fluoride and chloride affinities of main group oxides, fluorides, oxofluorides, and alkyls. Quantitative scales of lewis acidities from ion cyclotron resonance halide-exchange equilibria, J. Phys. Chem., 1984, 88, 1083. [all data]

Van Duzor, Wei, et al., 2010
Van Duzor, M.; Wei, J.; Mbaiwa, F.; Mabbs, R., I-center dot CH3X (X=Cl, Br, I) photodetachment: The effect of electron-molecule interactions in cluster anion photodetachment spectra and angular distributions, J. Chem. Phys., 2010, 133, 14, 144303, https://doi.org/10.1063/1.3487739 . [all data]

Cyr, Bishea, et al., 1992
Cyr, D.M.; Bishea, G.A.; Scarton, M.G.; Johnson, M.A., Observation of Charge-Transfer Excited States in the I-.CH3I, I-.CH3Br, and I-.CH2Br2 S(N)2 Reaction Intermediates Using Photofragmentation, J. Chem. Phys., 1992, 97, 8, 5911, https://doi.org/10.1063/1.463752 . [all data]


Notes

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