Publications

Publications of Professor Terry B. McMahon

  1. Determination of Ion Transit Times in an Ion Cyclotron Resonance Spectrometer, T.B. McMahon and J.L. Beauchamp, Rev. Sci. Inst., 42, 1632 (1971).
  2. A Versatile Trapped Ion Cell for Ion Cyclotron Resonance Spectroscopy, T.B. McMahon and J.L. Beauchamp, Rev. Sci. Inst., 43, 509 (1972).
  3. Determination of Carbonium Ion Stabilities by Ion Cyclotron Resonance Spectroscopy, T.B. McMahon, R.J. Blint, D.P. Ridge and J.L. Beauchamp, J. Amer. Chem. Soc., 94, 8934 (1972).
  4. Observation of Ion Ejection Phenomena in Ion Cyclotron Double Resonance Experiments, B.S. Freiser, T.B. McMahon and J.L. Beauchamp, Int. J. Mass. Spec. and Ion Phys., 12, 249 (1973).
  5. Acidity Basicity and Ion Molecule Reactions of Arsine in the Gas Phase by Ion Cyclotron Resonance Spectroscopy, R.H. Wyatt, D. Holtz, T.B. McMahon and J.L. Beauchamp, Inorg. Chem., 13, 1511 (1974).
  6. Gas Phase Ion Chemistry of Fluoromethanes by Ion Cyclotron Resonance Spectroscopy.  New Techniques for Determination of Carbonium Ion Stabilities, R.J. Blint, T.B. McMahon and J.L. Beauchamp, J. Amer. Chem. Soc., 96, 1269 (1974).
  7. Gas Phase Ion Chemistry of t‑Butanol by Ion Cyclotron Resonance Spectroscopy, J.L. Beauchamp, M.C. Caserio and T.B. McMahon, J. Amer. Chem. Soc., 96, 6243 (1974).
  8. Substituent Effects on the Intrinsic Acidities of Benzoic Acids Determined by Gas Phase Proton Transfer Equilibria Measurements, R. Yamdagni, T.B. McMahon and P. Kebarle, J. Am. Chem. Soc., 96, 4035 (1974).
  9. Intrinsic Acidities of Carbon Acids, R-H, Bond Dissociation Energies of R-H and Electron Affinities of R from Gas Phase Proton Transfer Equilibria Measurements, T.B. McMahon and P. Kebarle, J. Am. Chem. Soc., 96, 5940 (1974).
  10. Ion Molecule Reactions at High Pressure: Recent Proton Affinities, Gas Phase Acidities and Hydrocarbon Clustering Results, P. Kebarle, R. Yamdagni, K. Hiraoka and T.B. McMahon, Int. J. Mass. Spec. and Ion Phys., 19, 71 (1976).
  11. Intrinsic Acidities of Carbon and Nitrogen Acids Measured by Gas Phase Proton Transfer Equilibria.  Substituent Effects on the Stabilities of Gas Phase Carbanions and Nitrogen Anions, T.B. McMahon and P. Kebarle, J. Am. Chem. Soc., 98, 3399 (1976).
  12. Trapped Ion Cyclotron Resonance Studies of Symmetric Electron and Proton Transfer Reactions, T.B. McMahon, P.G. Miasek and J.L. Beauchamp, Int. J. Mass Spec. and Ion Phys., 21, 63 (1976).
  13. Kinetics of Symmetric Proton Transfer Reactions in Alcohols and Amines by Ion Cyclotron Resonance Spectroscopy, T.B. McMahon and J.L. Beauchamp, J. Phys. Chem., 81, 593 (1977).
  14. Intrinsic Activities of Substituted Phenols and Benzoic Acids Determined Gas Phase Proton Transfer Equilibria, T.B. McMahon and P. Kebarle, J. Amer. Chem. Soc., 99, 2222 (1977).
  15. Ion Cyclotron Resonance Study of an Organic Reaction Mechanism, T.B. McMahon in Lecture Notes in Chemistry, H. Hartmann, Ed., Springer Verlag, 7, 232 (1978).
  16. Solvation of Negative Ions by Protic and Aprotic Solvents.  Information from Gas Phase Ion Equilibria Measurements, P. Kebarle, W.R. Davidson, M. French, J.B. Cumming and T.B. McMahon, Disc. Chem. Soc., 64, 220 (1978).
  17. Gas Phase Acidic Solvolysis Reactions of Acyl Halides by Ion Cyclotron Resonance Spectroscopy, T.B. McMahon, Can. J. Chem., 56, 670 (1978).
  18. Characterization of Time Dependent Oscillations in Trapped Ion Cyclotron Resonance Spectra, T.B. McMahon, Int. J. Mass Spec. and Ion Phys., 26, 359 (1978).
  19. Gas Phase Ion Chemistry of Alkyl Nitrites by Ion Cyclotron Resonance Spectroscopy, R. Farid and T.B. McMahon, Int. J. Mass Spec. and Ion Phys., 27, 163 (1978).
  20. The Fluoroformate Ion, FCO2-. An Ion Cyclotron Resonance Study of the Gas Phase Lewis Acidity of Carbon Dioxide and Related Isoelectronic Species, T.B. McMahon and C. Northcott, Can. J. Chem., 56, 1069 (1978).
  21. Orientation Dependent Forces in Ion Molecule Reactions.  The Effect of Anisotropic Molecular Polarisability on Ion Molecule Reaction Rates, R. Clair and T.B. McMahon, Int. J. Mass Spec. and Ion Phys., 28, 365 (1978).
  22. Triplet States of Borazine and N-Trimethylborazine Determined by Trapped Electron Spectroscopy, C.E. Dorion, M.E. MacBeath and T.B. McMahon, Chem. Phys. Lett., 59, 90 (1978).
  23. An Ion Cyclotron Resonance Study of Competitive Solvation of Gas Phase Anions, R.L. Clair and T.B. McMahon, Can. J. Chem., 57, 473 (1979).
  24. An Ab Initio and Ion Cyclotron Resonance Study of the Protonation of Borazine, C.E. Doiron, F. Grein, T.B. McMahon and K. Vasudevan, Can. J. Chem., 57, 1751 (1979).
  25. Triplet States of Fluorocarbonyl Compounds Determined by Trapped Electron Spectroscopy, C.E. Doiron and T.B. McMahon, Chem. Phys. Lett., 63, 204 (1979).
  26. Ion Molecule Reactions of tert‑Butyl Alcohol by Ion Cyclotron Resonance Spectroscopy, J.L. Beauchamp, M.C. Caserio and T.B. McMahon in Benchmark Papers in Physical Chemistry and Chemical Physics, Vol. 3, Part III, J.L. Franklin, Ed., Dowden, Hutchinson and Ross Inc., Stroudsburg, Pa. (1979).
  27. Intrinsic Acidities of Substituted Phenols and Benzoic Acids Determined by Gas Phase Proton Transfer Equilibria, T.B. McMahon and P. Kebarle in Benchmark Papers in Physical Chemistry and Chemical Physics, Vol. 3, Part II, J.L. Franklin, Ed., Dowden, Hutchinson and Ross Inc., Stroudsburg, Pa. (1979).
  28. An Ion Cyclotron Resonance Study of Base Induced Elimination Reactions of Fluorinated Alcohols and Unimolecular Loss of HF from Chemically Activated Fluoroalkoxide Ions, R.L. Clair and T.B. McMahon, Int. J. Mass Spec. and Ion Phys., 33, 21 (1980).
  29. Non Ideal Behaviour of Weakly Ionized Gases, T.B. McMahon and R.L. Clair, Int. J. Mass Spec. and Ion Phys., 34, 63 (1980).
  30. Nucleophilic Addition-Elimination Reactions of Weak Bases with Trifluoroarsonium Ion in the Gas Phase by Ion Cyclotron Resonance Spectroscopy, C.E. Doiron and T.B. McMahon, Inorg. Chem., 19, 3037 (1980).
  31. Hydrogen Bond Assisted Reactions of Carboxylic Acids and Alkyl Halides in the Gas Phase by Ion Cyclotron Resonance Spectroscopy, R.L. Clair and T.B. McMahon, Can. J. Chem., 58, 307 (1980).
  32. Bimolecular Production of Gas Phase Ionic Hydrates by Ion Cyclotron Resonance Spectroscopy, R.L. Clair and T.B. McMahon, Can. J. Chem., 58, 863 (1980).
  33. The Gas Phase Acidities of Fluorinated Acetones.  An Ion Cyclotron Resonance Investigation of the Role of Fluorine Substituents in the Stabilization of Planar Carbanions, R. Farid and T.B. McMahon, Can. J. Chem., 58, 2307 (1980).
  34. Gas Phase Basicities of Fluorocarbonyl Cpds.  An Ion Cyclotron Resonance Investigation of the Effects of Fluorine & Trifluoromethyl Substituents on Hydroxy Carbonium Ion Stabilities, C.E. Doiron and T.B. McMahon, Can. J. Chem., 59, 2689‑2694 (1981).
  35. A Complete Statistical Thermodynamic Analysis of the Entropy Change for the Equilibrium: H3O+ + H2S D H3S+ + H2O, R.L. Clair and T.B. McMahon, Int. J. Mass Spec. and Ion Phys., 39, 27 (1981).
  36. Additivity of Fluorine Substituent Effects in the Gas Phase Basicities of Fluorinated Acetones, D.F. Drummond and T.B. McMahon, J. Phys. Chem., 85, 3746-3749 (1981).
  37. Bimolecular Production of Proton Bound Dimers in the Gas Phase.  A Low Pressure Ion Cyclotron Resonance Technique for Examination of Solvent Exchange Equilibria and Determination of Single Molecule Solvation Energetics, J.W. Larson, R.L. Clair and T.B. McMahon, Can. J. Chem., 60, 542-544 (1982).
  38. The Proton Affinity of Thioformaldehyde.  Implications for the Heat of Formation of Thioformaldehyde and Thiolmethyl Carbonium Ion from Ion Cyclotron Resonance Investigations of the Proton Transfer Reactions for CH2SH+, M. Roy and T.B. McMahon, Org. Mass Spectrom., 17, 392-395 (1982).
  39. Gas Phase Ion Chemistry and Basicities of Fluorinated Acetones.  An Ion Cyclotron Resonance Study of the Effects of Multiple Fluorine Substitution on Reactivities of Fluoroketones and Stabilities of Protonated Carbonyl Compounds, D.F. Drummond and T.B. McMahon, Int. J. Mass Spec. and Ion Phys., 42, 265-285 (1982).
  40. Formation, Thermochemistry and Relative Stabilities of Proton Bound Dimers of Oxygen N‑Donor Bases from Ion Cyclotron Resonance Solvent Exchange Equilibria Measurements, J.W. Larson and T.B. McMahon, J. Amer. Chem. Soc., 104, 6255-6261 (1982).
  41. The Gas Phase Bifluoride Ion.  An Ion Cyclotron Resonance Determination of the Hydrogen Bond Energy in FHF- from Gas Phase Fluoride Transfer Equilibrium Measurements, J.W. Larson and T.B. McMahon, J. Amer. Chem. Soc., 104, 5848-5849 (1982).
  42. Strong Hydrogen Bonding in Gas Phase Anions.  An Ion Cyclotron Resonance Determination of Fluoride Binding Energetics to Bronsted Acids from Gas Phase Fluoride Exchange Equilibria Measurements, J.W. Larson and T.B. McMahon, J. Amer. Chem. Soc., 105, 2944‑2950 (1983).
  43. The Proton Affinity of Water.  A Scale of Gas Phase Basicities Including Ethylene and Water from Ion Cyclotron Resonance Proton Transfer Equilibria Measurements, S.M. Collyer and T.B. McMahon, J. Phys. Chem., 87, 909-911 (1983).
  44. Chelation of Gas Phase Anions.  An Ion Cyclotron Resonance Study of Cooperative Binding of Fluoride and Chloride Ions, J.W. Larson and T.B. McMahon, J. Phys. Chem. 88, 1083‑1086 (1984).
  45. Gas Phase Bihalide and Pseudo-Bihalide Ions.  An Ion Cyclotron Resonance Determination of Hydrogen Bond Energies in XHY- Species (X,Y = F, Cl, Br, CN), J.W. Larson and T.B. McMahon, Inorg. Chem., 23, 2029-2033 (1984).
  46. Gas Phase Negative Ion Chemistry of Alkylchloroformates.  A Convenient Method for Bimolecular Generation of Chloride Ion Adducts and Determination of Chloride Affinities from Ion Cyclotron Resonance Thermal Equilibrium Measurements, J.W. Larson and T.B. McMahon, Can. J. Chem., 62, 675-679 (1984).
  47. Hydrogen Bonding in Gas Phase Anions.  An Experimental Investigation of the Interaction Between Chloride Ion and Bronsted Acids from Ion Cyclotron Resonance Chloride Exchange Equilibria, J.W. Larson and T.B. McMahon, J. Amer. Chem. Soc., 106, 517-521 (1984).
  48. The Proton Affinity of Water, T.B. McMahon in Ionic Processes in the Gas Phase, M.A. Almoster Ferreira, (ed)., D. Reidel Co., 358 (1984).
  49. The Mechanism of Borohydride Reductions.  Reactions of Gas Phase Borohydride with Carbonyl Groups by Ion Cyclotron Resonance Spectroscopy, M.M. Kayser and T.B. McMahon, Tet. Letters, 25, 3379-3382 (1984).
  50. Methyl Substituent Effects in the Gas Phase Acidities of Halosubstituted Organic Acids.  A Realignment with Substituent Effects in Solution, G. Caldwell, T.B. McMahon, P. Kebarle, J. Bartmess and J. Kiplinger, J. Am. Chem. Soc., 107, 80-82 (1985).
  51. 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.W. Larson and T.B. McMahon, J. Amer. Chem. Soc., 107, 766-773 (1985).
  52. The Anomalous Gas Phase Acidity of Ethyl Fluoride.  An Ab Initio Investigation of the Importance of Hydrogen Bonding Between F- and sp2 and sp C‑H Bonds, M. Roy and T.B. McMahon, Can J. Chem., 63, 708-715 (1985).
  53. Thermodynamic Control in the Reactions of Gas Phase Anions.  An Ab Initio and Ion Cyclotron Resonance of the Reactions of Anions with Diborane, O. Eisenstein, M.M. Kayser, M. Roy and T.B. McMahon, Can. J. Chem., 63, 281-287 (1985).
  54. Bridging the Gap.  A Continuous Scale of Gas Phase Basicities from Methane to Water from Pulsed Electron Beam High Pressure Mass Spectrometric Equilibria Measurements, T.B. McMahon and P. Kebarle, J. Am. Chem. Soc., 107, 2612-2617 (1985).
  55. Proton Affinities of the Hydrogen, Methyl and Trifluoromethyl Halides from Pulsed Electron Beam High Pressure Mass Spectrometric Equilibria Measurements, T.B. McMahon and P. Kebarle, Can. J. Chem., 63, 3160-3167 (1985).
  56. The Formyl and Isoformyl Cations.  A Pulsed Electron Beam High Pressure Mass Spectrometric Study of the Energetics of HCO+ and HOC+, T.B. McMahon and P. Kebarle, J. Chem. Phys., 83, 3919-3923 (1985).
  57. Deuterium Fractionation Factor for the Gas Phase Hydronium Ion, J.W. Larson and T.B. McMahon, J. Am. Chem. Soc., 108, 1719-1720 (1986).
  58. The C-Xe Bond Strength in the Methylxenonium Cation Determined from Ion Cyclotron Resonance Methyl Cation Exchange Equilibria, J.K. Hovey and T.B. McMahon, J. Am. Chem. Soc., 108, 528-529 (1986).
  59. Strong Hydrogen Bonding in Gas Phase Ions: A High Pressure Mass Spectrometric Study of Formation and Energetics of Methylfluoride Proton Bound Dimer, T.B. McMahon and P. Kebarle, J. Am. Chem. Soc., 108, 6502-6505 (1986).
  60. Assignment of Absolute Gas Phase Basicities of Small Molecules T.B. McMahon in “Structure/Reactivity and Thermochemistry of Ions”, P. Ausloos, S.G. Lias and D.A. Dixon (eds)., NATO ASI Series C, 193, 305-320 (1987).
  61. An Ion Cyclotron Resonance Investigation of Trends in Fluoride Binding Energetics of Main Group Oxyfluorides.  The Gas Phase Fluoride Affinities of FAsO, FPO, FPO2, F2SiO, F4SO and FBO, J.W. Larson and T.B. McMahon, Inorg. Chem., 26, 4018-4023 (1987).
  62. The Isotope Effect in Proton Transfer Reactions.  An Ion Cyclotron Resonance Determination of the Equilibrium Isotope Effect for Bichloride Anion, T.B. McMahon, J. Phys. Chem., 91, 554-557 (1987).
  63. The C-Kr Bond Strength in the Methylkryptonium Ion Determined from Ion Cyclotron Resonance Methyl Cation Transfer Equilibria, J.K. Hovey and T.B. McMahon, J. Phys. Chem., 91, 4560-4562 (1987).
  64. Hydrogen Bonding in Gas Phase Ions. The Energetics of Interaction of Cyanide Ion and Bronsted Acids from Ion Cyclotron Resonance Cyanide Exchange Equilibria, J.W. Larson and T.B. McMahon, J. Amer. Chem. Soc., 109, 6230-6236 (1987).
  65. Equilibrium Isotope Effects in the Gas Phase Hydration of H3O+, F- and Cl-.  The Effect of Hydrogen Bond Formation on Gas Phase Isotope Fractionation Factors, J.W. Larson and T.B. McMahon, J. Amer. Chem. Soc., 110, 1087-1093 (1988).
  66. A Pulsed Ionization High Pressure Mass Spectrometer Study of Methyl Cation Transfer and Methyl Cation Induced Clustering in Dimethylether-Acetone Mixtures, J.E. Szulejko, J.J. Fisher, T.B. McMahon and J.W. Wronka, Int. J. Mass. Spectrom Ion Proc., 83, 147 (1988).
  67. A Gas Phase Anionic Analogue of the Wittig Reaction.  An Ion Cyclotron Resonance Study of the Gas Phase Ion Chemistry of Silyl Carbanions, A. Campanaro, C.H. Marvin, S.P. Morehouse and T.B. McMahon, Org. Mass Spectrom, 23, 663 (1988).
  68. Gas Phase Lewis Acid Base Interactions.  An Experimental Determination of Cyanide Binding Energies from Ion Cyclotron Resonance and High Pressure Mass Spectrometric Equilibrium Measurements, J.W. Larson, J.E. Szulejko and T.B. McMahon, J. Amer. Chem. Soc., 110, 7604 (1988).
  69. Methyl Cation Affinities, T.B. McMahon, T. Heinis, G. Nicol, J.K. Hovey and P. Kebarle, J. Am. Chem. Soc., 110, 7591 (1988).
  70. Carbene-Like Character of Gaseous Ions. An Ion Cyclotron Resonance, High Pressure Mass Spectrometric and Ab Initio Investigation of Reactions of the Difluoronitrenium Ion with Methane, J.J. Fisher and T.B. McMahon, J. Am. Chem. Soc., 110, 7599 (1988).
  71. Determination of Unimolecular Decomposition and Radiative Lifetimes of Chemically Activated Ions by Fourier Transform Ion Cyclotron Resonance Spectroscopy, P. Kofel and T.B. McMahon, J. Phys. Chem., 92, 6174 (1988).
  72. Pulsed Laser Ionization High Pressure Mass Spectrometry:  A New Route to Gas Phase Metal Ion‑Ligand Thermochemistry, F. Bouchard, J. Hepburn and T.B. McMahon, J. Am. Chem. Soc., 111, 8934 (1989).
  73. How Strong is the Si=C Bond in Fluoro-methyl Substituted Silaethylenes?  An Experimental and Ab Initio Study, C.E. Allison and T.B. McMahon, J. Am. Chem. Soc., 112, 1672 (1990).
  74. A High Pressure External Ion Source for Fourier Transform Ion Cyclotron Resonance Spectrometry, P. Kofel and T.B. McMahon, Int. J. Mass Spectrom Ion Proc., 98, 1 (1990).
  75. Determination of Rate Constants for Low Pressure Association Reactions by Fourier Transform Ion Cyclotron Resonance Spectrometry, J.J. Fisher and T.B. McMahon, Int. J. Mass Spectrom Ion Proc., 100, 701 (1990).
  76. Determination of Bond Dissociation Energies via Energy Resolved Collision Induced Dissociation in a Fourier Transform Ion Cyclotron Resonance Spectrometer, C.E.C.A. Hop, T.B. McMahon and G.D. Willett, Int. J. Mass Spectrom. Ion Proc., 101, 191 (1990).
  77. Observation of a Weakly Bound Mn(CO)5+/CH4 Complex, C.E.C.A. Hop and T.B. McMahon, J. Am. Chem. Soc., 113, 355 (1991).
  78. Ion Molecule Reactions in Methylamine and Di- and Tri-Methylamine Systems, J.A. Herman, K. Herman and T.B. McMahon, J. Am. Soc. Mass Spectrom., 2, 220 (1991).
  79. Strong Hydrogen Bonding in Gas Phase Ions.  A High Pressure Mass Spectrometric Study of the Proton Affinity, Proton Transfer Kinetics and Hydrogen Bonding Capability of Iron Pentacarbonyl, C.E. Allison, J.A. Cramer, C.E.C.A. Hop, J.E. Szulejko and T.B. McMahon, J. Am. Chem. Soc., 113, 4469 (1991).
  80. High Pressure Mass Spectrometric Observation of Hydrogen Bridged Metal Carbonyl/Alkene Cations, C.E.C.A. Hop and T.B. McMahon, Inorg. Chem., 30, 2828 (1991).
  81. A Pulsed Electron Beam Variable Temperature High Pressure Mass Spectrometric Re‑evaluation of the Proton Affinity Difference Between 2 Methyl Propene and Ammonia, J.E. Szulejko and T.B. McMahon, Int. J. Mass Spectrom. Ion Proc., 109, 279 (1991).
  82. On the Structure of Al(acetone)2+, C.W. Bauschlicher, F. Bouchard, J.W. Hepburn, T.B. McMahon, P. Surjasasmita, L. Roth, J.R. Gord and B.S. Freiser, Int. J. Mass Spectrom. Ion Proc., 109, 15 (1991).
  83. Formation of C6H7+ Ions in Ion-Molecule Reactions in Vinyl Chloride, J.A. Herman, K. Herman and T.B. McMahon, Can. J. Chem. 69, 2038 (1991).
  84. A Compact High Pressure Source for High and Low Energy Collision Induced Dissociation Studies of Cluster Ions on a VG Analytical ZHB-2FqQ, J.E. Szulejko, A.G. Harrison, C.E.C.A. Hop, T.B. McMahon, J. Stone and A. Young, J. Am. Soc. Mass Spectrom., 3, 33 (1992).
  85. Translational Energy Dependence of Gas Phase Reactions of Halides with Halogenated Alkanes, C.E.C.A. Hop and T.B. McMahon, J. Phys. Chem. 95, 10582 (1992).
  86. Gas Phase Oxidation of Group 6 Metal Carbonyl Anions, C.E.C.A. Hop and T.B. McMahon, J. Am. Chem. Soc. 114, 1237 (1992).
  87. Fourier Transform Ion Cyclotron Resonance Mass Spectrometry Measurements of Rate Constants of Ion-Molecule Reactions with Continuous Ejection of Product Ions.  Reactions of CH3ClH+ with Methyl Chloride, J.A. Herman, G. Xu, K. Herman and T.B. McMahon, Int. J. Mass Spectrom. Ion Proc. 113, 143 (1992).
  88. Low Energy Collision-Induced Dissociation of Gas-Phase Fluoride-Alcohol Adduct Ions, F.E. Wilkinson, C.E.C.A. Hop and T.B. McMahon, Chem. Phys. Lett. 192, 517 (1992).
  89. Fourier Transform Ion Cyclotron Resonance Investigation of the Deuterium Isotope Effect on Gas Phase Ion Molecule Hydrogen Bonding Interactions in Alcohol-Fluoride Adduct Ions, F.E. Wilkinson, J.E. Szulejko, C.E. Allison and T.B. McMahon, Int. J. Mass Spectrom. Ion Proc., 117, 487 (1992).
  90. Ion-Molecule Reactions of tert-Butyl Cation with Tertiary Alcohols, H.E. Audier, D. Berthomieu, D. LeBlanc, T.B. McMahon and T.H. Morton, Int. J. Mass. Spectrom. Ion Proc., 117, 327 (1992).
  91. Activation of Silane by W+ in the Gas Phase, A.Ferhati, T.B. McMahon and G. Ohanessian, Bull. Soc. Chim. Fra. 130, 3 (1993).
  92. Progress Toward an Absolute Gas Phase Proton Affinity Scale, J.E. Szulejko and T.B. McMahon, J. Am. Chem. Soc. 115, 7839 (1993).
  93. Isomerization and Isotope Effects in Sterically Congested Cluster Ions, J.E. Szulejko and T.B. McMahon, Org. Mass Spectrom. 28, 1009 (1993).
  94. Gas Phase Chemistry of the Bare Tungsten Cation, A. Ferhati, T.B. McMahon and G. Ohanessian, Trends in Inorganic Chemistry 3, 151 (1993).
  95. Methoxy Methyl Cation [CH3OCH2+] Revisited: An Experimental and Theoretical Study, H.E. Audier, G. Bouchoux, T.B. McMahon, A. Milliet and T. Vulpius, Org. Mass Spectrom. 29, 176 (1994).
  96. Isotope and Temperature Effects in the Kinetics of Low Pressure Association Reactions of Protonated Acetone with Acetone by Fourier Transform Ion Cyclotron Resonance Spectrometry, D. Thölmann, A. McCormick and T.B. McMahon, J. Phys. Chem., 98, 1156 (1994).
  97. Protonation of Ferrocene in the Gas Phase, C.E.C.A. Hop and T.B. McMahon, J. Am. Soc. Mass. Spectrom. 5, 274 (1994).
  98. Spontaneous Unimolecular Dissociation of Small Cluster Ions H3O+Ln and Cl-(H2O)n (n=2-4) Under Fourier Transform Ion Cyclotron Resonance Conditions, D. Thölmann, D.S. Tonner and T.B. McMahon, J. Phys. Chem. 98, 2002 (1994).
  99. Slow Metastable Dissociation of Chemically Activated Adduct Ions.  The Fourier Transform Ion Cyclotron Resonance Analogue of the MIKES experiment, H.E. Audier and T.B. McMahon, J. Am. Chem. Soc. 116, 8294 (1994).
  100. New Theoretical and Experimental Proton Affinities for Methyl Halides and Diazomethane.  A revision of the Methyl Cation Affinity Scale, M.N. Glukhovstev, J.E. Szulejko, T.B. McMahon, J.G. Gauld, A.P. Scott, B.J. Smith, A. Pross and L. Random, J. Phys. Chem. 98, 13099 (1994).
  101. Catalyzed Isomerization of Simple Radical Cations in the Gas Phase, H.E. Audier, D. Leblanc, P. Mourgues, T.B. McMahon and S. Hammerum,  J. Chem. Soc. Chem. Comm. 20, 2329 (1994).
  102. Deuterium Isotope Effects on the Radiatively Induced Unimolecular Dissociation of Small Cluster Ions, D.S. Tonner, D. Thölmann and T.B. McMahon,  Chem. Phys. Lett. 233, 324 (1995).
  103. Zero Pressure Thermal Radiation Induced Dissociation of Gas Phase Cluster Ions: Comparison of Theory and Experiment for (H2O)2Cl- and (H2O)3Cl-, R.C. Dunbar, T.B. McMahon, D. Thölmann, D.S. Tonner, D.R. Salahub and O. Wei  J. Amer. Chem. Soc., 117, 12819 (1995).
  104. Experimental Approaches to the Unimolecular Dissociation of Gaseous Cluster Ions, in Advances in Gas Phase Ion Chemistry, T.B. McMahon, (Vol. 2) N. Adams and L. Babcock (eds)., JAI Press, Connecticut (1996).
  105. Activation of Silane by W+ in the Gas Phase: Fourier Transform Ion Cyclotron Resonance and Ab Initio Theoretical Studies, A. Ferhati, T.B. McMahon and G. Ohanessian,  J. Amer. Chem. Soc., 118, 5997 (1996).
  106. Generation of Covalent and Electrostatic Complexes in Association Reactions of t-Butyl Cation with Small Organics, K. Norrman and T.B. McMahon,  J. Amer. Chem. Soc., 118, 2449 (1996).
  107. Evidence for Gas Phase Ion Neutral Complexes of the Form [CH3+, CH3OH] and [CH3+, CH3OCH3], H.E. Audier, G.K. Koyanagi, T.B. McMahon and D. Thölmann,  J. Phys. Chem., 100, 8220 (1996).
  108. High Pressure Mass Spectrometric Investigations of the Potential Energy Surfaces of Gas Phase SN2 Reactions, C. Li, P. Ross, J.E. Szulejko and T.B. McMahon,  J. Am. Chem. Soc., 118, 9360 (1996).
  109. Formation of Proton Bound Dimers as the Driving Force for Alkyl Radical Loss in the Gas Phase Reactions of Radical Cations, H.E. Audier, J. Fossey, P. Mourgues, T.B. McMahon and S. Hammerum, J. Phys. Chem., 100, 18380 (1996).
  110. Dissociation Thermochemistry of Tetramethylsilane Ion.  Comparative Determination by Thermal Dissociation & Threshold Collisional Dissociation, C. Lin, S.J. Klippenstein, R.C. Dunbar, C. Haynes, P.B. Armentrout, D.S. Tonner and T.B. McMahon, J. Phys. Chem., 100, 19659 (1996).
  111. The Ambient Character of the Methoxy Methyl Cation.  Gas Phase Ion-Molecule Reactions of CH3OCH2+ with Alcohols”, H.E. Audier, F. Dahhani and T.B. McMahon, J. Mass Spectrom., 32, 201 (1997).
  112. Activation of Hydrocarbons by W+ in the Gas Phase, P. Mourgues, A. Ferhati, T.B. McMahon and G. Ohanessian,  Organometallics, 16, 210 (1997).
  113. A Combined Experimental & Theoretical Study of the Protonation of Polyfluoro-benzenes [C6H6-nFn], n=0 to 6, J.E. Szulejko, J. Hrusak & T.B. McMahon,  J. Mass Spectrom., 32, 494 (1997).
  114. Energetics and Structure of Complexes of Al+ with Small Organic Molecules in the Gas Phase, F. Bouchard, V. Brenner, C. Cara, J.W. Hepburn, G.K. Koyanagi, T.B. McMahon, G. Ohanessian and M. Peschke,  J. Phys. Chem., 101, 5885-5894 (1997).
  115. Consecutive Infrared Multiphoton Dissociations in a Fourier Transform Ion Cyclotron Resonance Mass Spectrometer, D.S. Tonner and T.B. McMahon, Anal.Chem., 69, 4735-4740 (1997).
  116. Activation of Unimolecular Reactions by Ambient Black Body Radiation, R.C. Dunbar and T.B. McMahon, Science (invited feature article), 279, 194-197 (1998).
  117. Structure and Energies of Protonated α,ω Methoxy Alcohols, J.E. Szulejko, T.B. McMahon, V. Troude, G. Bouchoux and H.E. Audier, J. Phys. Chem. A, 102, 1879-1887 (1998).
  118. The Relationship Between Effective Temperature of Thermalized Ions & Ion Source Temp., K. Norrman and T.B. McMahon, Int. J. Mass Spectrom. Ion Proc. 176, 87-97 (1998).
  119. Deuterium Isotope Effects on Gas phase Ion-Molecule Hydrogen Bonding Interactions Alcohol-Alkoxide and Alcohol-Chloride Adduct Ions, F.E. Wilkinson, M. Peschke, J.E. Szulejko and T.B. McMahon, Int. J. Mass Spectrom. Ion Proc., 175, 225-240, (1998).
  120. Gas Phase Basicities of Acid Anhydrides, G. Bouchoux, J.F. Gal, P.C. Maria, J.E. Szulejko, T.B. McMahon, J. Tortajada, A. Luna, M. Yanez and O. Mo, J. Phys. Chem. A., 102, 9183-9192, (1998).
  121. The Gas Phase Reactions of the Methoxymethyl Cation with Aldehydes and Ketones, G. van der Rest, G. Bouchoux, H.E. Audier and T.B. McMahon, Eur. Mass Spectrom. 4, 339-347 (1998).
  122. Fundamentals of  Gas Phase Ion Thermochemistry, T.B. McMahon, in Fundamentals and Applications of Gas Phase Ion Chemistry, K.R. Jennings (ed.), Kluwer Academic Publishers, Dordrecht, Netherlands, pp. 202-222, (1999).
  123. Isotope Effects in the Dissociation Reactions of Proton Bound Amine Dimers in the Gas Phase, K. Norrman and T.B. McMahon, Int. J. Mass Spectrom. 182/183,  381-402 (1999).
  124. Stepwise Solvation of Halides by Alcohol Molecules in the Gas Phase, B. Bogdanov, M. Peschke, D.S. Tonner, J.E. Szulejko and T.B. McMahon, Int. J. Mass Spectrom. 185/186/187, 707-735 (1999).
  125. High Pressure Mass Spectrometry: Instrumentation, Techniques and Applications, T.B. McMahon in Thermochemistry of Stable Molecules and Reactive Intermediates, M. Minas de Piedade (ed.), Kluwer Academic Publishers, Dordrecht, Netherlands, 259-280 (1999).
  126. A Quantitative Basis for A Scale of Na+ Affinities of Organic and Small Biological Molecules in the Gas Phase, S. Hoyau, K. Norrman, T.B. McMahon and G. Ohanessian, J. Amer. Chem. Soc. 121, 8864-8875 (1999).
  127. Intramolecular Solvation of Carboxylate Anions in the Gas Phase, K. Norrman and T.B. McMahon, J. Phys. Chem. A., 103 , 7008-7016 (1999).
  128. The C2H7+ Potential Energy Surface.  A Fourier Transform Ion Cyclotron Resonance Investigation of the Reaction of Methyl Cation with Methane, J.J. Fisher, G.K. Koyanagi and T.B. McMahon, Int. J. Mass Spectrom, 195/196, 491-505 (2000).
  129. Metastable and Collision Induced Decomposition Studies and Thermochemistry of Isomeric C4H11Si+ Ions and their Adducts with C4H12Si Silanes, C.E.C.A. Hop, D.A. Saulys, D.F. Gaines, J.E. Szulejko and T.B. McMahon, J. Mass Spectrom., 35, 1003-1010 (2000).
  130. Deuterium  Isotope Effect on Gas Phase Ion-Molecule Hydrogen Bonding Interactions: Multiply Solvated Fluoride, Chloride and Alkoxide Ions, F.E. Wilkinson and T.B. McMahon, Int. J. Mass Spectrom., 199, 127-139 (2000)
  131. Catalyzed Keto-Enol Tautomerism of Radical Cations: An FTICR Investigation of Proton Transport Isomerization, G. van der Rest, H. Nedev, J. Chamot-Rooke, P. Mourgues, H.E. Audier and T.B. McMahon, Int. J. Mass Spectrom., 202, 161- 174 (2000).
  132. An Experimental and ab initio Study of the Nature of the Binding in Gas Phase Complexes of Sodium Ions, T.B. McMahon and G. Ohanessian, Chem. Eur. J., 6, 2931-2941 (2000).
  133. Non-Statistical Effects in the Gas Phase SN2 Reaction, D.S. Tonner and T.B. McMahon, J. Am. Chem. Soc., 122, 8783-8784 (2000).
  134. An ab initio and Density Functional Theory Investigation of the Structures and Energetics of Halide Ion-Alcohol Complexes in the Gas Phase, B.Bogdanov and T.B. McMahon J. Phys. Chem. A., 104, 7871-7880 (2000).
  135. A Fourier Transform Ion Cyclotron Resonance Mass Spectrometric Study of the Temperature and Isotope Effects on the Kinetics of Low-Pressure Association Reactions of Protonated Dimethyl Ether with Dimethyl Ether, T.D. Fridgen and T.B. McMahon, J. Phys. Chem. A., 105, 1011-1019 (2001)
  136. Reaction of Protonated Dimethyl Ether with Dimethyl Ether: Temperature and Isotope Effect on the Side Reaction Producing Trimethyl Oxonium Ion and Methanol, T.D. Fridgen and T.B. McMahon, J. Am. Chem. Soc. 123, 3980-3985 (2001).
  137. B. Bogdanov, H.J.S. Lee and T.B. McMahon, The Influence of Fluorine Substitution on the Structure and Thermochemistry of Chloride Ion – Ether Complexes in the Gas Phase, Int. J. Mass Spectrom., 210/211, 387-402 (2001).
  138. T.D. Fridgen, J.D. Keller and T.B. McMahon, Direct Experimental Determination of Energy Barriers for Methyl Cation Transfer in the Reactions of Methanol with Protonated Methanol, Protonated Acetonitrile and Protonated Acetaldehyde:  A Low Pressure FTICR Study. J. Phys. Chem. A. 105, 3816-3824 (2001).
  139. P. Mourgues, J. Chamot-Rooke, G. van der Rest, H. Nedev, H.E. Audier and T.B. McMahon, Catalyzed Keto-Enol Tautomerism of Ionized Acetone: An FTICR Study of Proton Transport Isomerization. Int. J. Mass Spectrom., 210/211, 429-446 (2001).
  140. G. van der Rest, J. Chamot-Rooke, P. Mourgues, T.B. McMahon and H.E. Audier, Ter-Body Intermediates in the Gas Phase: Reaction of Ionized Enols with tert-Butanol. J. Am. Soc. Mass Spectrom. 12, 938-947 (2001).
  141. T.D. Fridgen and T.B. McMahon, Binding Energies of Proton-Bound Ether/Alcohol Mixed Dimers Determined by FTICR Radiative Association Kinetics Measurements. J. Phys. Chem. A. 106 , 1576 – 1583 (2002).
  142. T.D. Fridgen and T.B. McMahon, Experimental Determination of Activation Energies for Gas Phase Ethyl and n-Propyl Transfer Reactions. J. Phys. Chem. A. (JP013874W, ASAP March 30th, 2002, set for publication Oct. 24th, 2002).
  143. G. Bouchoux, D. Defaye, T. McMahon, O. Mó and M.Yáñez, Structural and Energetic Aspects of the Protonation of Phenol, Catechol, Resorcinol and Hydroquinone. Chem.  Eur.  J. 8, 2900 – 2909 (2002).
  144. B. Bogdanov and T.B. McMahon, Structures, Thermochemistry, and Infrared Spectra of Chloride Ion-Fluorinated Acetone Complexes and Neutral Fluorinated Acetones in the Gas Phase: Experiment and Theory, Int. J. Mass Spectrom. 219, 593-613 (2002).
  145. T.D. Fridgen and T.B. McMahon, Enthalpy Barriers for Assymetric SN2 Alkyl Cation Transfer Reactions Between Neutral and Protonated Alcohols, J. Phys. Chem. A. (submitted for publication, August 2002, #JP026818J).
  146. J.L. Burkell, T.D. Fridgen and T.B. McMahon, Gas-Phase Acidities and Sites of Deprotonation of 2-Ketones and Structures of the Corresponding Enolates, Int. J. Mass Spectrom.