• "The Reactivity of Metallated Nitrenium Ions Studied by FT-ICR." Yurkovich, M.J.; Duan, P.; Shea, R.C.; Watkins, M.A.; Mandell, S.M.; Tippmann, E.M.; Li, S.; Platz, M.S.; Kenttämaa, H.I. Int. J. Mass Spectrom., 2009, In Press.

• "Ion/Molecule Reaction for the Mass Spectrometric Characterization of Basic Bifunctional Analytes." Fu, M.; Duan, P.; Li, S.; Eismin, R.J.; Kenttämaa, H.I. J. Am. Soc. Mass Spectrom., 2009, In Press.
  
  
• "Ion-Molecule Reactions Facilitate the Identification and Differentiation of Primary, Secondary and Tertiary Amino Functionalities in Protonated Monofunctional Analytes in Mass Spectrometry." Fu, M.; Eismin, R.J.; Duan, P.; Li, S.; Kenttämaa, H.I. Int. J. Mass Spectrom., 2009, 282, 77-84.
  
  
• "Identification of Aliphatic and Aromatic Tertiary N-oxide Functionalities in Protonated Analytes via Ion-molecule Reactions in a Mass Spectrometer." Duan, P.; Fu, M.; Gillespie, T.A.; Winger, B.E.; Kenttämaa, H.I. J. Org. Chem., 2009, 74, 1114-1123.

• “Correlation of Hydrogen-Atom Abstraction Reaction Efficiencies for Aryl Radicals with their Vertical Electron Affinities and the Vertical Ionization Energies of the Hydrogen-Atom Donors.” Jing, L.; Nash, J.J.; Kenttämaa, H.I. J. Am. Chem. Soc., 2008, 130, 17697-17709.

• “Reactivity of the 3,4,5-Tridehydropyridinium Cation - An Aromatic σ,σ,σ-Triradical.” Jankiewicz, B.J.; Reece, J.N.; Vinueza, N.R.; Nash, J.J.; Kenttämaa, H.I. Angew. Chem. Int. Ed., 2008, 47, 9860-9865 (selected for the cover of the communications section).
  
  
• “The Selectivity of Charged Phenyl Radicals in Hydrogen Atom Abstraction Reactions with Isopropanol.” Jing, L.; Guler, L.P.; Pates, G.; Kenttämaa, H.I. J. Phys. Chem. A, 2008, 112, 9708-9715.
  
  
• "Identification of the Aromatic Tertiary N-oxide Functionality in Protonated Analytes via Ion-molecule Reactions in Mass Spectrometers." Duan, P.; Gillespie, T.A.; Winger, B.E.; Kenttämaa, H.I. J. Org. Chem., 2008, 73, 4888-4894.
  
  
• “Reactivity of Aromatic σ,σ-Biradicals Toward Dinucleoside Phosphates.” Yang, L.; Nash, J.J.; Yurkovich, M.J.; Kenttämaa, H.I. Org. Lett., 2008, 10, 1889-1892.
  
  
• "Quantum Chemical Characterization of the Structures, Thermochemical Properties, and Doublet-Quartet Splittings of Tridehydropyridinium Cations." Nash, J.J.; Kenttämaa, H.I.; Cramer, C.J. J. Phys. Chem. A 2008, 112, 5542- 5553.
  
  
• "Regioselective Ion-Molecule Reactions for the Mass Spectrometric Differentiation of Protonated Isomeric Aromatic
  Diamines.” Fu, M.; Duan, P.; Li, S.; Habicht, S.C.; Pinkston, D.S.; Vinueza, N.R.; Kenttämaa, H.I. Analyst 2008, 133, 452-454.
  
  
• “Identification of the Carboxylic Acid Functionality by Using Electrospray Ionization and Ion-Molecule Reactions in a Modified Linear Quadrupole Ion Trap Mass Spectrometer.” Habicht, S.C.; Vinueza, N.R.; Archibold, E.F.; Duan, P.; Kenttämaa, H.I. Anal. Chem. 2008, 80, 3416-3421.
  
  
• “Analysis of Base Oil Fractions by ClMn(H2O)+ Chemical Ionization Combined with Laser-induced Acoustic
  Desorption/Fourier Transform Ion Cyclotron Resonance Mass Spectrometry.” Duan, P.; Qian, K.; Habicht, S.C.; Pinkston, D.S.; Fu, M.; Kenttämaa, H.I. Anal. Chem. 2008, 80, 1847-1853 (Accelerated Article).
  
  
• “Gas-Phase Reactions of ClMn(H2O)+ with Polar and Nonpolar Hydrocarbons in a Mass Spectrometer.” Duan, P.; Fu, M.; Pinkston, D.S.; Habicht, S.C.; Kenttämaa, H.I. J. Am. Chem. Soc. 2007, 129, 9266-9267.
  
  
• “Reactivity of an Aromatic σ,σ,σ-Triradical: the 2,4,6-Tridehydropyridinium Cation.” Jankiewicz, B.J.; Adeuya, A.; Yurkovich, M.J.; Vinueza, N.R.; Gardner III, S.J.; Zhou, M.; Nash, J.J.; Kenttämaa, H.I. Angew. Chem. Int. Ed. 2007, 46, 9198-9201 (selected for the cover of the communications section).
  
  
• “Ion-Molecule Reactions of Trimethylborate Allow the Mass Spectrometric Identification and Counting of Functional Groups in Protonated Bifunctional Oxygen-Containing Compounds and Polyols.” Somuramasami, J.; Duan, P.; Watkins, M.A.; Winger, B.E.; Kenttämaa, H.I. Int. J. Mass Spectrom. 2007, 265, 359-371.
  
  
• “Functional-Group Selective Ion-Molecule Reactions: Mass Spectrometric Identification of the Amido Functionality in Protonated Monofunctional Compounds.” Campbell, K.M.; Watkins, M.A.; Li, S.; Fiddler, M.N.; Winger, B.E.; Kenttämaa, H.I. J. Org. Chem. 2007, 72, 3159-3165 (selected for the cover of the issue).
  
  
• “Design and Characterization of a High-power Laser-induced Acoustic Desorption (LIAD) Probe Coupled with a Fourier-transform Ion Cyclotron Resonance Mass Spectrometer.” Shea, R.C.; Habicht, S.C.; Vaughn, W.E.; Kenttämaa, H.I. Anal. Chem. 2007, 79, 2688-2694.
  
  
• “Experimental Investigations of the Internal Energy of Molecules Evaporated via Laser-induced Acoustic Desorption into a Fourier-transform Ion Cyclotron Resonance Mass Spectrometer (LIAD/FT-ICR).” Shea, R.C.; Petzold, C.J.; Liu, J.; Kenttämaa, H.I. Anal. Chem. 2007, 79, 1825-1832.
  
  
• “A Novel Approach for Peptide Sequencing: Laser-induced Acoustic Desorption Combined with P(OCH3)2+ Chemical Ionization and Collision-activated Dissociation in a Fourier Transform Ion Cyclotron Resonance Mass
  Spectrometer.” Somuramasami, J.; Kenttämaa, H.I. J. Am. Soc. Mass Spectrom. 2007, 18, 525-540.
  
  
• “Quantum Chemical Characterization of the Vertical Electron Affinities of Didehydroquinolinium and Didehydroisoquinolinium Ions.” Nash, J.J.; Kenttämaa, H.I.; Cramer, C.J. J. Phys. Chem. A 2006, 110, 10309-10315.
  
  
• “Characterization of Laser-induced Acoustic Desorption Utilized with a Fourier Transform Ion Cyclotron Resonance Mass Spectrometer.” Shea, R.C.; Campbell, J.L.; Petzold, C.J.; Li, S.; Aaserud, D.J.; Kenttämaa, H.I. Anal. Chem. 2006, 78, 6133-6139.
  
  
• “Reactivity of Aromatic σ,σ-Biradicals Toward Riboses.” Adeuya, A.; Yang, L.; Amegayibor, F.S.; Nash, J.J.; Kenttämaa, H.I. J. Am. Soc. Mass Spectrom. 2006, 17, 1325-1334.
  
  
• "Rearrangement of Phenylcarbene Radical Cation to Dehydrotropylium Cation." Watkins, M.A.; Nelson, E.D.; Tichy, S.E.; Kenttämaa, H.I. Int. J. Mass Spectrom. 2006, 249/250, 1-7.
  
  
• “The Reactivity of the N-Methylene-5,8-didehydroquinolinium Triradical.” Nizzi, K.E.; Amegayibor, F.S.; Nash, J.J.; Kenttämaa, H.I. J. Am. Chem. Soc. 2005, 127, 13152-13153.
  
  
• “Laser-Induced Acoustic Desorption/Fourier Transform on Cyclotron Resonance Mass Spectrometry for Petroleum Distillate Analysis.” Crawford, K.E.; Campbell, J.L.; Fiddler, M.N.; Duan, P.; Qian, K.; Gorbaty, M.L.; Kenttämaa, H.I. Anal. Chem. 2005, 77, 7916-7923.
  
  
• “Quantum Chemical Characterization of the Structures, Thermochemical Properties, and Singlet-Triplet Splittings of Didehydroquinolinium and Didehydroisoquinolinium Ions.” Nash, J.J.; Kenttämaa, H.I.; Cramer, C.J. J. Phys. Chem. 2005, A109, 10348-10356.
  
  
• “Phenyl Radicals React with Dinucleoside Phosphates by Addition to Purine Bases and H-Atom Abstraction from a Sugar Moiety.” Liu, J.; Petzold, C.J.; Ramirez-Arizmendi, L.E.; Perez, J.; Kenttämaa, H.I. J. Am. Chem. Soc. 2005, 127, 12758-12759.
  
  
• “Compound Screening for the Presence of the Primary N-oxide Functionality via Ion-Molecule Reactions in a Mass Spectrometer.” Watkins, M.A.; WeWora, D.V.; Li, S.; Winger, B.E.; Kenttämaa, H.I. Anal. Chem. 2005, 77, 5311-5316.
  
  
• “Analysis of Polyethylene by Using Cyclopentadienyl Cobalt Chemical Ionization Combined with Laser-induced Acoustic Desorption/Fourier Transform Ion Cyclotron Resonance Mass Spectrometry.” Campbell, J.L.; Fiddler, M.N.; Crawford, K.E.; Gqamana, P.P.; Kenttämaa, H.I. Anal. Chem. 2005, 77, 4020-4026.
  
  
• “Theoretical and Experimental Investigations on the Reactions of Positively Charged Phenyl Radicals with Aromatic Amino Acids.” Huang, Y.; Kenttämaa, H.I. J. Am. Chem. Soc. 2005, 127, 7952-7960.
  
  
• “Demonstration of Tunable Reactivity for meta-Benzynes.” Nash, J.J.; Nizzi, K.E.; Adeuya, A.; Yurkovich, M.J.; Cramer, C.J.; Kenttämaa, H.I. J. Am. Chem. Soc. 2005, 127, 5760-5761.
  
  
• “Ion-Molecule Reactions for the Characterization of Polyols and Polyol Mixtures by ESI/FT-ICR Mass Spectrometry.” Watkins, M.A.; Winger, B.E.; Shea, R.C.; Kenttämaa, H.I. Anal. Chem. 2005, 77, 1385-1392.
  
  
• “Radical Reactions as Modeled by Distonic Ions,” a book chapter in the Encyclopedia of Mass Spectrometry, Volume 4: Fundamentals of and Applications to Organic (and Organometallic) Compounds, Volume Ed. Nibbering, N.N.M. Eds. Gross, M.L.; Caprioli, R. Elsevier: New York, 2005 (invited).
  
  
• “Ion-molecule Reactions of Distonic Radical Cations,” a book chapter in the Encyclopedia of Mass Spectrometry, Volume 4: Fundamentals of and Applications to Organic (and Organometallic) Compounds, Volume Ed. Nibbering, N.N.M. Eds. Gross, M.L.; Caprioli, R. Elsevier: New York, 2005 (invited).
  
  
• “Reactions of Charged Phenyl Radicals with Aliphatic Amino Acids in the Gas Phase.” Huang, Y.; Guler, L.; Heidbrink, J.; Kenttämaa, H.I. J. Am. Chem. Soc. 2005, 127, 3973-3978.
  
  
• “Gas-phase Reactivity of Charged π-Type Biradicals.” Tichy, S.E.; Nelson, E.D.; Amegayibor, F.S.; Kenttämaa, H.I. J. Am. Chem. Soc. 2004, 126, 12957-12967.
  
  
• “The Gas-Phase Acidities of cis- and trans-2-tert-Butyl-1,3-dithian-5-ol.” Adeuya, A.; Artau, A.; Kenttämaa, H.I.; Squires, R.R. J. Phys. Chem. A 2004, 108, 7379-7385.
  
  
• “Theoretical Estimations of the 298 K Gas-Phase Acidities of the Purine-Based Nucleobases Adenine and Guanine.” Huang, Y.; Kenttämaa, H.I. J. Phys. Chem. A 2004, 108, 4485-4490.
  
  
• “Ion-Molecule Reactions for Mass Spectrometric Identification of Functional Groups in Protonated Oxygen-containing Monofunctional Compounds.” Watkins, M.A.; Price, J.M.; Winger, B.E.; Kenttämaa, H.I. Anal. Chem. 2004, 76, 964-976.
  
  
• “Analysis of Saturated Hydrocarbons by Using Chemical Ionization Combined with Laser-induced Acoustic Desorption Fourier-transform Ion Cyclotron Resonance Mass Spectrometry (LIAD/FT-ICR).” Campbell, J.L.; Crawford, K.E.; Kenttämaa, H.I. Anal. Chem. 2004, 76, 959-963.
  
  
• “Quantitative Determination of the Selectivity of Five Different Phenyl Radicals in Hydrogen atom Abstraction from Ethanol.” Jing, L.; Guler, L.P.; Nash, J.J.; Kenttämaa, H.I. J. Am. Soc. Mass Spectrom. 2004, 15, 913-919.
  
  
• “Gas-Phase Radical-radical Recombination Reactions of Nitroxides with Substituted Phenyl Radicals.” Heidbrink, J.L.; Amegayibor, F.S.; Kenttämaa, H.I. Int. J. Chem. Kin. 2004, 36, 216-229.
  
  
• “Radical Reactions of Didehydroarenes with a 1,4-Relationship.” Amegayibor, S.A.; Nash, J.J.; Kenttämaa, H.I. J. Am. Chem. Soc. 2003, 125, 14256-14257.
  
  
• “Theoretical and Experimental Investigations on the Chemical Reactions of Positively Charged Phenyl Radicals with Cytosine and 1-Methylcytosine.” Huang, Y.; Kenttämaa, H.I. J. Am. Chem. Soc. 2003, 125, 9878-9889.
  
  
• “Characterization of Two Chloro-Substituted m-Benzyne Isomers: Effect of Substitution on Reaction Efficiencies and Products.” Price, J.M.; Kenttämaa, H.I.  J. Phys.Chem. A 2003, 107, 8985-8995.
  
  
• “Theoretical Estimations of the 298 K Gas-Phase Acidities of the Pyrimidine-based Nucleobases Uracil, Thymine and Cytosine.” Huang, Y.; Kenttämaa, H.I. J. Phys. Chem. A 2003, 107, 4893-4897.
  
  
• “Experimental and Theoretical Characterization of the 3,5-Didehydrobenzoate Anion: A Negatively Charged meta-Benzyne.” Price, J.M.; Nizzi, K.E.; Campbell, J.L.; Kenttämaa, H.I.; Seierstad, M.; Cramer, C.J. J. Am. Chem. Soc. 2003, 125, 131-140.
  
  
• “Reactivity of Substituted Charged Phenyl Radicals toward Components of Nucleic Acids.” Ramirez-Arizmendi, L.E.; Heidbrink, J.L.; Guler, L.P.; Kenttämaa, H.I. J. Am. Chem. Soc. 2003, 125, 2272-2281.
  
  
• “Distonic Radical Cations”, a book chapter in the Encyclopedia of Mass Spectrometry, Volume 1: Theory and Ion Chemistry, Volume Ed. Armentrout, P.B. Eds. Gross, M.L.; Caprioli, R. (ISBN 0-08-043802-4), Elsevier: New York, 2003 (invited).
  
  
• “Chemical Properties of a para-Benzyne.” Amegayibor, F.S.; Nash, J.J.; Lee, A.S.; Thoen, J.; Petzold, C.J.; Kenttämaa, H.I. J. Am. Chem. Soc. 2002, 124, 12066-12067.
  
  
• “Charge-site Effects on the Radical Reactivity of Distonic Ions.” Petzold, C.J.; Nelson, E.D.; Lardin, H.A.; Kenttämaa, H.I. J. Phys. Chem. A 2002, 106, 9767-9775.
  
  
• “An Experimental and Computational Study of the Gas-Phase Structures of Five-Carbon Monosaccharides.” Guler, L.P.; Yu, Y.-Q.; Kenttämaa, H.I. J. Phys. Chem. A 2002, 106, 6754-6764.
  
  
• “Mechanistic Study of Stereoselective Gas-Phase Reactions of Phosphenium Ions with cis- and trans-1,2-Diaminocyclohexanes.” Thompson, R.S.; Guler, L.P.; Nelson, E.D.; Yu, Y.-Q.; Kenttämaa, H.I. J. Org. Chem. 2002, 67, 5076-5084.
  
  
• “Differentiation of Stereoisomeric Steroids by Reactions with Phosphenium Ions.” Petucci, C.; Guler, L.; Kenttämaa, H.I. J. Am. Soc. Mass Spectrom. 2002, 13, 362-370.
  
  
• “Hydrogen Atom Abstraction Reactions of Charged Aromatic σ-Radicals Related to the Active Intermediates of Enediyne Antitumor Drugs.” Petucci, C.; Nyman, M.; Guler, L.; Kenttämaa, H.I. J. Am. Chem. Soc. 2002, 124, 4108-4115.
  
  
• “Photodechlorination of 3,3'-Dichlorobenzidine in Water.” Nyman, M.C.; Haber, K.S.; Kenttämaa, H.I.; Blatchley III, E.R. J. Environ.Toxicol. Chem. 2002, 21, 500-506.
  
  
• “Gas-Phase Reactions of Charged Phenyl Radicals with Nonvolatile, Thermally Labile Biomolecules Evaporated by Laser-induced Acoustic Desorption.” Petzold, C.J.; Ramirez-Arizmendi, L.E.; Heidbrink, J.L.; Perez, J.; Kenttämaa, H.I. J. Am. Soc. Mass Spectrom. 2002, 13, 192-194.
  
  
• “Polar Effects Control Hydrogen Abstraction Reactions of Charged, Substituted Phenyl Radicals.” Heidbrink, J.L.; Ramirez-Arizmendi, L.E.; Thoen, K.K.; Guler, L.; Kenttämaa, H.I. J. Phys. Chem. A 2001, 105, 7875-7884.
  
  
• “An Examination of Barriered and Barrierless Hydrogen Atom Abstraction Reactions by Organic Radical Cations: the Cytosine Radical Cation.” Price, J.M.; Petzold, C.J.; Byrd, H.C.M.; Kenttämaa, H.I. Int. J. Mass Spectrom. 2001, 212, 455-466.
  
  
• “meta-Benzyne Reacts as an Electrophile.” Nelson, E.D.; Artau, A.; Price, J.M.; Tichy, S.E.; Jing, L.; Kenttämaa, H.I. J. Phys. Chem. A 2001, 105, 10155-10168.
  
  
• “Hydrogen Atom Abstraction and Addition Dominate the Reactivity of Charged Phenyl Radicals Toward Monosubstituted Aromatic Substrates in the Gas Phase.” Ramirez-Arizmendi, L.E.; Guler, L.; Ferra, Jr., J.; Thoen, K.; Kenttämaa, H.I. Int.J. Mass Spectrom. 2001, 210/211, 511-520 (special issue to honor Nico Nibbering’s retirement).
  
  
• “Synthesis and Characterization of a Distonic Nitrene Ion: Gas-Phase Reactivity of Singlet and Triplet N-Phenyl-3-Nitrenopyridinium Ion.” Tichy, S.E.; Hill, B.T.; Campbell, J.L.; Kenttämaa, H.I. J. Am. Chem. Soc. 2001, 123, 7923-7924.
  
  
• “N-Terminal Derivatization and Fragmentation of Neutral Peptides via Ion-Molecule Reactions with Acylium Ions: Towards Gas-Phase Edman Degradation?” Reid, G.E., Tichy, S.E.; Perez, J.; O’Hair, R.A.J.; Simpson, R.J.; Kenttämaa, H.I. J. Am. Chem. Soc. 2001, 123, 1184-1192.
  
  
• “Polarity of the Transition State Controls the Reactivity of Related Charged Phenyl Radicals toward Atom and Group Donors.” Tichy, S.E.; Thoen, K.K.; Price, J.M.; Ferra, Jr., J.J.; Petucci, C.J.; Kenttämaa, H.I. J. Org. Chem. 2001, 66, 2726-2733.
  
  
• “An FT-ICR Study of the 3,5-Dehydrophenyl Cation.” Nelson, E.D.; Kenttämaa, H.I. J. Am. Soc. Mass Spectrom. 2001, 12, 258-267.
  
  
• “m-Benzyne Reacts as an Electrophile.” Nelson, E.D.; Artau, A.; Price, J.M.; Kenttämaa, H.I. J. Am. Chem. Soc. 2000, 122, 8781-8782.
  
  
• “Reactivity of the Gaseous Radical Cations of Trimethylenemethane and 2-Iso-propylidenecyclopentane-1,3-diyl.” Chou, P.K.; Gao, L.; Tichy, S.E.; Painter, S.L.; Blackstock, S.C.; Kenttämaa, H.I. J. Phys. Chem. A 2000, 104, 5530-5534.
  
  
• "Laser-Induced Acoustic Desorption/Chemical Ionization in Fourier-transform Ion Cyclotron Resonance Mass Spectrometry." Perez, J.; Ramirez-Arizmendi, L.E.; Petzold, C.J.; Guler, L.P.; Nelson, E.D.; Kenttämaa, H.I. Int. J. Mass Spectrom. 2000, 198, 173-188.
  
  
• "Polar Effects on Iodine Atom Abstraction by Charged Phenyl Radicals (Distonic Radical Cations)." Heidbrink, J.L.; Thoen, K.K.; Kenttämaa, H.I. J. Org. Chem. 2000, 63, 645-651.
  
  
• "Gas-Phase Fragmentation of Di- and Tripeptides via Ion-Molecule Reactions with ClPCl+." Yu, Y.-Q.; Stumpf, C.L.; Kenttämaa, H.I. Int. J. Mass Spectrom. 2000, 195/196, 609-623 (invited article, a memorial issue in honor of Bob Squires).
  
  
• "Gas-Phase Reactions of the Dichlorocarbene Radical Cation." Nelson, E.D.; Tichy, S.E.; Kenttämaa, H.I. Perkin Trans. Actions II 1999, 11, 2267-2272 (invited article, a memorial issue in honor of Bob Squires).
  
  
• "Diastereoselectivity in Gas-Phase Hydride Reduction Reactions of Ketones." Artau, A.; Ho, Y.; Kenttämaa, H.I.; Squires, R.R. J. Am. Chem. Soc. 1999, 121, 7130-7137.
  
  
• "Laser Desorption in Transmission Geometry Inside a Fourier-Transform Ion Cyclotron Resonance Mass Spectrometer." Perez, J.; Petzold, C.J.; Watkins, M.A.; Vaughn, W.E.; Kenttämaa, H.I. J. Am. Soc. Mass Spectrom. 1999, 10, 1105-1110.
  
  
• "Determination of 3,3'-Dichlorobenzidine and Its Degradation Products in Environmental Samples with a Small Low-Field Fourier-Transform Ion Cyclotron Resonance Mass Spectrometer." Nyman, M.C.; Perez, J.; Blatchley III, E.R.; Kenttämaa, H.I. J. Am. Soc. Mass Spectrom. 1999, 10, 1152-1156.
  
  
• "Reactivity of Cl-P+-Cl Toward Cyclic Organic Ethers." Ramirez-Arizmendi, L.E.; Yu, Y.-Q.; Kenttämaa, H.I. J. Am. Soc. Mass Spectrom. 1999, 10, 379-385.
  
  
• "Reactivity of a Substituted m-Benzyne Biradical." Thoen, K.K.; Kenttämaa, H.I. J. Am. Chem. Soc. 1999, 121, 800-805.
  
  
• "Intrinsic Acidity and Redox Properties of the Adenine Radical Cation." Hwang, T.; Stumpf, C.; Yu, Y.-Q.; Kenttämaa, H.I. Int. J. Mass Spectrom. 1999, 182/183, 253-259 (invited article; a memorial issue in honor of Ben Freiser).
  
  
• "Reactions of tert-Butyl Isocyanide with Distonic Radical Cations." Nelson, E.D.; Li, R.; Kenttämaa, H.I. Int. J. Mass Spectrom. Ion Processes 1999, 185/186/187, 91-96.
  
  
• "Synthesis of Charged Phenyl Mono- and Biradicals by Photolysis in a FT-ICR Mass Spectrometer." Thoen, K.K.; Perez, J.; Ferra, Jr., J.J.; Kenttämaa, H.I. J. Am. Soc. Mass Spectrom. 1998, 9, 1135-1140.
  
  
• "The Dimethylene Ketene Radical Cation." Chou, P.K.; Thoen, K.K.; Kenttämaa, H.I. J. Org. Chem. 1998, 63, 4470-4474.
  
  
• "Gas-Phase Reactivity of the 2,6- and 3,5-Dimethylenepyridinium Biradicals." Nelson, E.D.; Thoen, K.K.; Kenttämaa, H.I. J. Am. Chem. Soc. 1998, 120, 3792-3798.
  
  
• "Disulfide Bond Cleavage in Neutral Substrates by the Dimethylene Ketene Radical Cation inside a Mass Spectrometer." Thoen, K.K.; Tutko, D.; Pèrez, J.; Smith, R.L.; Kenttämaa, H.I. Int. J. Mass Spectrom. Ion Processes 1998, 175, 173-177.
  
  
• "Stereoselective Chemical Ionization Mass Spectrometry: Reactions of CH3OPOCH3+ with Cyclic Vicinal Diols." Thoen, K.K.; Gao, L.; Ranatunga, T.D.; Vainiotalo, P.; Kenttämaa, H.I. J. Org. Chem. 1997, 62, 8702-8707.
  
  
• "Electron and Proton Transfer Reactions of Simple Aldehyde and Ketone Radical Cations and their Enol and Distonic Isomers in the Gas Phase." Byrd, H.C.M.; Castro, L.M.; Yu, Y.-Q.; Hwang, C.T.; Kenttämaa, H.I. Int. J. Mass Spectrom. Ion Processes 1997, 167/168, 403-414.
  
  
• "Reactions of Alkyl Halides with Distonic Acylium Radical Cations." Smith, R.L.; Thoen, K.K.; Stirk, K.M.; Kenttämaa, H.I. Int J. Mass Spectrom. Ion Processes 1997, 165/166, 315-325.
  
  
• "Synthesis and Characterization of Aromatic Biradicals in the Gas Phase: a meta-Benzyne with an Inert Positively Charged Substituent and Its ortho- and para- Isomers." Thoen, K.K.; Kenttämaa, H.I. J. Am. Chem. Soc. 1997, 119, 3832-3833.
  
  
• "Disubstituted Boron Cations Cleave Carbonyl Bonds." Ranatunga, T.D.; Kennady, J.M.; Kenttämaa, H.I. J. Am. Chem. Soc. 1997, 119, 5200-5207.
  
  
• "The Radical Cation of Trimethylphosphine Oxide." Li, R.; Schweighofer, A.; Keck, H.; Kuchen, W.; Kenttämaa, H.I. Int. J. Mass Spectrom. Ion Processes 1996, 157/158, 293-303.
  
  
• "The Prototypical Organophosphorus Ylidion CH2PH3+." Schweighofer, A.; Chou, P.K.; Thoen, K.K.; Nanayakkara, V.K.; Keck, H.; Kuchen, W.; Kenttämaa, H.I. J. Am. Chem. Soc. 1996, 118, 11893-11897.
  
  
• "Charged Phenyl Radicals." Thoen, K.K.; Smith, R.L.; Nousiainen, J.; Nelson, E.D.; Kenttämaa, H.I. J. Am. Chem. Soc. 1996, 118, 8669-8676.
  
  
• "Characterization of Long-Chain Carboxylic Acid Esters with CH3OBOCH3+ in a Small Fourier-Transform Ion Cyclotron Resonance Mass Spectrometer." Thoen, K.K.; Tutko, D.T.; Ranatunga, T.D.; Kenttämaa, H.I. J. Am. Soc. Mass Spectrom. 1996, 7, 1138-1143.
  
  
• "Distinguishing Conventional and Distonic Radical Cations by Using Dimethyl Diselenide." Thoen, K.K.; Beasley, B.J.; Smith, R.L.; Kenttämaa, H.I. J. Am. Soc. Mass Spectrom. 1996, 17, 1245-1250.
  
  
• "Fluorine Substitution Enhances the Reactivity of Substituted Phenyl Radicals Toward Organic Hydrogen Atom Donors." Li, R.; Smith, R.L.; Kenttämaa, H.I. J. Am. Chem. Soc. 1996, 118, 5056-5061.
  
  
• "Unusual Reactivity of the Radical Cations of Some Simple Trivalent Organophosphorus Compounds Toward Dimethyl Disulfide and Dimethyl Diselenide." Smith, R.L.; Schweighofer, A.; Keck, H.; Kuchen, W.; Kenttämaa, H.I. J. Am. Chem. Soc. 1996, 118, 1408-1412.
  
  
• "Homolytic Se-H Bond Energy and Ionization Energy of Benzeneselenol and the Acidity of the Corresponding Radical Cation." Leeck, D.T.; Li, R.; Chyall, L.J.; Kenttämaa, H.I. J. Phys. Chem. 1996, 100, 6608-6611.
  
  
• "Methyl Propionate Radical Cation." Pakarinen, J.M.H.; Vainiotalo, P.; Stumpf, C.L.; Leeck, D.T.; Chou, P.K.; Kenttämaa, H.I. J. Am. Soc. Mass Spectrom. 1996, 7, 482-489.
  
  
• "Structure and Reactivity of Selected Distonic Radical Cations." Smith, R.L.; Chou, P.K.; Kenttämaa, H.I. pp. 197-261. An invited chapter in The Structure, Energetics, and Dynamics of Organic Ions, Ed: Baer, T.; Ng, C.Y.; Powis, I. Wiley Series on Ion Chemistry and Physics, 1996.
  
  
• "An Experimental and Theoretical Study of the Long-Lived Radical Cation of CH3OCH2CH2OH." Pakarinen, J.M.H.; Smith, R.L.; Vainiotalo, P.; Pakkanen, T.A.; Kenttämaa, H.I. J. Am. Chem. Soc. 1996, 118, 3914-3921.
  
  
• "The Site of Protonation of Aniline." Smith, R.L.; Chyall, L.J.; Beasley, B.J.; Kenttämaa, H.I. J. Am. Chem. Soc. 1995, 117, 7971-7973.
  
  
• "Reactivity of the Prototype Organosulfur Distonic Ion: CH2SH2+." Chou, P.K.; Smith, R.L.; Chyall, L.J.; Kenttämaa, H.I. J. Am. Chem. Soc. 1995, 117, 4374-4378.
  
  
• "A General Method for the Synthesis of Charged Phenyl Radicals in the Gas Phase." Smith, R.L.; Kenttämaa, H.I. J. Am. Chem. Soc. 1995, 117, 1393-1396.
  
  
• "Gas-Phase Reactions of the 4-Dehydroanilinium Ion and Its Isomers." Chyall, L.J.; Kenttämaa, H.I. J. Mass Spectrom. 1995, 30, 81-87.
  
  
• "Gas-Phase Reactions of Dicoordicated Boron Cations with Alcohols." Ranatunga, T.D.; Kenttämaa, H.I. Inorg. Chem. 1995, 34, 18-27.
  
  
• "Differentiation of Stereoisomeric Diols by Using CH3OB+OCH3 in a Small Fourier-Transform Ion Cyclotron Resonance Mass Spectrometer." Leeck, D.T.; Ranatunga, T.D.; Smith, R.L.; Partanen, T.; Vainiotalo, P.; Kenttämaa, H.I. Int. J. Mass Spectrom. Ion Processes 1995, 141, 229-240.
  
  
• "A New Reagent for Structure Specific Ion-Molecule Reactions. Dimethyl Diselenide." Beasley, B.J.; Smith, R.L.; Kenttämaa, H.I. J. Mass Spectrom. 1995, 30, 384-385.