Methane, bromo-

Data at NIST subscription sites:

NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.


Ion clustering 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 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 • Methane, bromo-)

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

Quantity Value Units Method Reference Comment
Δr46.9 ± 4.2kJ/molTDAsLi, Ross, et al., 1996gas phase; B
Δr38.5 ± 2.1kJ/molTDAsDougherty and Roberts, 1974gas phase; B,M
Quantity Value Units Method Reference Comment
Δr58.6J/mol*KHPMSDougherty and Roberts, 1974gas phase; M
Quantity Value Units Method Reference Comment
Δr19.2 ± 0.84kJ/molTDAsLi, Ross, et al., 1996gas phase; B
Δr20.9 ± 3.3kJ/molTDAsDougherty and Roberts, 1974gas phase; B

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

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

Quantity Value Units Method Reference Comment
Δr265.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

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

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

Quantity Value Units Method Reference Comment
Δr46.9kJ/molPHPMSMeot-Ner, 1984gas phase; M
Quantity Value Units Method Reference Comment
Δr87.9J/mol*KPHPMSMeot-Ner, 1984gas phase; M

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

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

Quantity Value Units Method Reference Comment
Δr52.3 ± 4.2kJ/molTDAsLi, Ross, et al., 1996gas phase; B
Δr45.6 ± 2.1kJ/molTDAsDougherty and Roberts, 1974gas phase; B,M
Δr51. ± 13.kJ/molIMRBRiveros, Breda, et al., 1973gas phase; Anchored: Larson and McMahon, 1984; B
Quantity Value Units Method Reference Comment
Δr53.6J/mol*KHPMSDougherty and Roberts, 1974gas phase; Entropy change is questionable; M
Quantity Value Units Method Reference Comment
Δr28.5 ± 0.84kJ/molTDAsLi, Ross, et al., 1996gas phase; B
Δr30. ± 5.0kJ/molTDAsDougherty and Roberts, 1974gas phase; B

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

By formula: I- + CH3Br = (I- • CH3Br)

Quantity Value Units Method Reference Comment
Δr34.7 ± 0.84kJ/molN/AVan Duzor, Wei, et al., 2010gas phase; B
Δr34.7 ± 2.1kJ/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

Go To: Top, Ion clustering data, References