The gas-phase basicity and proton affinity of 7-methyl-1,3,5-cycloheptatriene as determined by the thermokinetic method.

  title={The gas-phase basicity and proton affinity of 7-methyl-1,3,5-cycloheptatriene as determined by the thermokinetic method.},
  author={Michael Mormann and Dietmar Kuck},
  journal={Journal of mass spectrometry : JMS},
  volume={42 2},
  • M. Mormann, D. Kuck
  • Published 2007
  • Chemistry, Medicine
  • Journal of mass spectrometry : JMS
4 Citations
  • D. Kuck
  • Chemistry, Medicine
  • Mass spectrometry reviews
  • 2020
The development of the current knowledge of the gas-phase chemistry of protonated methylbenzenes, such as toluenium, xylenium and mesitylenium ions, their higher congeners as well as of their mostlyExpand
From Fragmentation to Construction--from Void to Massive: Fascination with Organic Mass Spectrometry and the Synthesis of Novel Three-Dimensional Polycyclic Aromatic Hydrocarbons.
  • D. Kuck
  • Chemistry, Medicine
  • Chemical record
  • 2015
It is shown how unexpected reactivity of related ions in solution can lead to the construction of novel and, in part, unique three-dimensional polycyclic structures that may contribute to future research in material science. Expand
Energetics and Reaction Mechanisms for the Competitive Losses of H2, CH4 and C2H4 from Protonated Methylbenzenes—Implications to the Methanol-to-Hydrocarbons (MTH) Process
We report the unimolecular decomposition following collisional activation of protonated mono-, di- and trimethylbenzenes as a function of collision energy. The resulting energy-resolved mass spectraExpand
Composite C- and H-scrambling and fragmentation of long-lived protonated 6-methylfulvene and 6,6-dimethylfulvene—alternative entry to the gas-phase chemistry of gaseous toluenium (C7H9+) and xylenium (C8H11+) ions
Abstract The fragmentation of metastable 6-methylfulvenium and 6,6-dimethylfulvenium ions, generated by gas-phase protonation of the neutral hydrocarbons in the CI(CH 4 ) plasma, has beenExpand


Dissociation routes of protonated toluene probed by infrared spectroscopy in the gas phase.
The present results confirm the structural predictions derived from theory and provide evidence for the existence of protonated cycloheptatriene but also pose some questions about the comparability of intensities in multiphoton dissociation and linear absorption spectra. Expand
Gas-phase titration of C7H9+ ion mixtures by FT-ICR mass spectrometry: Semiquantitative determination of ion populations generated by CI-induced protonation of C7H8 isomers and by EI-induced fragmentation of some monoterpenes
Abstract The composition of various mixtures of isomeric gaseous C 7 H 9 + ions, generated from four different C 7 H 8 precursors by CI(methane) and CI(isobutane) and by EI-induced fragmentation ofExpand
Microcanonical modeling of the thermokinetic method.
  • G. Bouchoux
  • Chemistry, Medicine
  • The journal of physical chemistry. A
  • 2006
It is shown that the standard thermokinetic method would predict correct 298 K gas phase basicities, GB(298)(M), even for polydentate molecules M, if experiments are conducted at this temperature. Expand
The Gas-Phase Basicity and Proton Affinity of 1,3,5-Cycloheptatriene—Energetics, Structure and Interconversion of Dihydrotropylium Ions
The hitherto unknown gas-phase basicity and proton affinity of 1,3,5-cycloheptatriene (CHT) have been determined by Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry. SeveralExpand
Gas-Phase Acidities of Cycloheptatrienes: Effects of Alkyl Groups on the Stability of Carbanions
The gas-phase acidities of 7-alkyl substituted cycloheptatrienes have been determined by Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry using a proton-transfer equilibriumExpand
Mass Spectrometry and Gas‐Phase Ion Chemistry of Dienes and Polyenes
1 Introduction 2 Gaseous Radical Cations of Some Dienes and Polyenes: Thermochemistry of Some Typical Reactions 3 Unimolecular Isomerization and Fragmentation 4 Gaseous Anions GeneratedExpand
Protonated 1,3,5‐cycloheptatriene and 7‐alkyl‐1,3,5‐cycloheptatrienes in the gas phase: ring contraction to the isomeric alkylbenzenium ions
1,3,5-Cycloheptatriene (1) and various 7-alkyl-1,3,5-cycloheptatrienes (3, 6, 9, 13, and 16-19) were subjected to gas-phase protonation under Cl(CH4) and Cl(iC(4)H(10)) conditions and the MIKEExpand
The Gas-Phase Basicities of 6-Methylfulvene and 6,6-Dimethylfulvene as Determined by the Thermokinetic Method
The gas-phase basicities (GB) of 6-methylfulvene and 6,6-dimethylfulvene have been determined by Fourier transform ion cyclotron resonance spectrometry using the thermokinetic method. ProtonExpand
Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update
The available data on gas-phase basicities and proton affinities of approximately 1700 molecular, radical and atomic neutral species are evaluated and compiled. Tables of the data are sorted (1)Expand
A relationship between the kinetics and thermochemistry of proton transfer reactions in the gas phase
Abstract For the proton transfer reaction [MH]+ + B → M + [BH]+ (I) a correlation is observed between the experimental reaction rate kexp and the standard free energy variation ΔG°. This correlationExpand