Determination of the compound class and functional groups in protonated analytes via diagnostic gas‐phase ion‐molecule reactions

2021 ◽  
Author(s):  
Judy Kuan‐Yu Liu ◽  
Edouard Niyonsaba ◽  
Kawthar Z. Alzarieni ◽  
Victoria M. Boulos ◽  
Ravikiran Yerabolu ◽  
...  
Keyword(s):  
Gas Phase ◽  
Functional Groups ◽  
Ion Molecule Reactions ◽  
Gas Phase Ion

The fluoroformate ion, FCO2−. An ion cyclotron resonance study of the gas phase Lewis acidity of carbon dioxide and related isoelectronic species

1978 ◽  
Vol 56 (8) ◽  
pp. 1069-1074 ◽  
Author(s):  
Terrance Brian McMahon ◽  
Colleen Joan Northcott
Keyword(s):  
Carbon Dioxide ◽  
Gas Phase ◽  
Lewis Acidity ◽  
Ion Cyclotron Resonance ◽  
Dissociation Energies ◽  
Ion Molecule Reactions ◽  
Gas Phase Acidity ◽  
Gas Phase Ion ◽  
Carbonyl Fluoride

The gas phase ion molecule reactions of a number of potential fluoride donors with carbon dioxide and carbonyl fluoride have been studied. By determination of preferential directions of fluoride transfer the fluoride affinities of carbon dioxide and carbonyl fluoride have been bracketed and found to be 33 ± 3 kcal/mol and 35 + 3 kcal/mol respectively. In addition, from gas phase acidity studies of acetyl fluoride and 2-fluoropropene the fluoride affinities of ketene and allene have been calculated to be 38 ± 2 kcal/mol and 15 ± 2 kcal/mol respectively. The order of fluoride affinities (Lewis acidities) of carbon dioxide, ketene, and allene have been examined and explained in terms of the electron affinities of the F—C(A)(B) species (A,B=O,CH2) and the C—F bond dissociation energies. These quantities have been estimated and the latter interpreted on the basis of the π bond energies of the three compounds.

scholarly journals The Determination of Electron Abundances in Interstellar Clouds

1980 ◽  
Vol 87 ◽  
pp. 339-340
Author(s):  
Alwyn Wootten ◽  
Ronald Snell ◽  
A. E. Glassgold
Keyword(s):  
Gas Phase ◽  
Molecular Clouds ◽  
Cosmic Ray ◽  
Ionization Rate ◽  
Interstellar Clouds ◽  
Ion Molecule Reactions ◽  
Upper Limits ◽  
Gas Phase Ion ◽  
Existing Data

A new method for estimating electron fractions in shielded molecular clouds is proposed on the basis of gas phase ion-molecule reactions which involves measuring the quantity . Applied to existing data, it yields upper limits to Xe in the range from 10−8 to 10−7 for a variety of clouds, warm as well as cool. An upper bound to the cosmic ray ionization rate is also obtained.

Gas-Phase Ion-Molecule Reactions: A Model for the Determination of Biologically Reactive Electrophilic Contaminants in the Environment

1994 ◽  
Vol 66 (11) ◽  
pp. 1902-1910 ◽  
Author(s):  
Jody A. Freeman ◽  
Jodie V. Johnson ◽  
Richard A. Yost ◽  
Douglas W. Kuehl
Keyword(s):  
Gas Phase ◽  
Ion Molecule Reactions ◽  
Gas Phase Ion

scholarly journals 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

1982 ◽  
Vol 60 (4) ◽  
pp. 542-544 ◽  
Author(s):  
J. W. Larson ◽  
R. L. Clair ◽  
T. B. McMahon
Keyword(s):  
Gas Phase ◽  
Single Molecule ◽  
Cyclotron Resonance ◽  
Ion Cyclotron Resonance ◽  
Solvent Exchange ◽  
Ion Molecule Reactions ◽  
Ion Cyclotron ◽  
Gas Phase Ion ◽  
Low Pressures

A scheme is presented whereby sequences of fast bimolecular gas phase ion molecule reactions in mixtures containing (CHF2)2O may be used to generate proton bound dimer species at low pressures in an ion cyclotron resonance spectrometer. Using competitive solvent switching reactions it is demonstrated that solvent exchange equilibria may be readily established and from the thermochemical data derived from such equilibria accurate relative single molecule solvation energetics obtained.

Reactivity Trends in the Gas Phase Addition of Acetylene to N-protonated Aryl Radical Cations

2020 ◽  
Author(s):  
Oisin Shiels ◽  
P. D. Kelly ◽  
Cameron C. Bright ◽  
Berwyck L. J. Poad ◽  
Stephen Blanksby ◽  
...  
Keyword(s):  
Gas Phase ◽  
Ion Trap ◽  
Radical Cations ◽  
Rate Coefficients ◽  
Similar Process ◽  
Ion Molecule Reactions ◽  
Aromatic Radicals ◽  
Polycyclic Aromatic ◽  
Gas Phase Ion ◽  
Type Radical

<div> <div> <div> <p>A key step in gas-phase polycyclic aromatic hydrocarbon (PAH) formation involves the addition of acetylene (or other alkyne) to σ-type aromatic radicals, with successive additions yielding more complex PAHs. A similar process can happen for N- containing aromatics. In cold diffuse environments, such as the interstellar medium, rates of radical addition may be enhanced when the σ-type radical is charged. This paper investigates the gas-phase ion-molecule reactions of acetylene with nine aromatic distonic σ-type radical cations derived from pyridinium (Pyr), anilinium (Anl) and benzonitrilium (Bzn) ions. Three isomers are studied in each case (radical sites at the ortho, meta and para positions). Using a room temperature ion trap, second-order rate coefficients, product branching ratios and reaction efficiencies are reported. </p> </div> </div> </div>

Gas phase ion-molecule reactions of monogermane with oxygen and ammonia

1988 ◽  
Vol 354 (1) ◽  
pp. 39-50 ◽  
Author(s):  
Paola Benzi ◽  
Lorenza Operti ◽  
Gian Angelo Vaglio ◽  
Paolo Volpe ◽  
Maurizio Speranca ◽  
...  
Keyword(s):  
Gas Phase ◽  
Ion Molecule Reactions ◽  
Gas Phase Ion

scholarly journals Erratum to: In-source CID of guanosine: Gas phase ion — Molecule reactions

2006 ◽  
Vol 17 (11) ◽  
pp. 1629-1629
Author(s):  
Robin Tuytten ◽  
Eddy Esmans ◽  
Wouter A. Herrebout ◽  
Benjamin J. Veken ◽  
Ed Dudley ◽  
...  
Keyword(s):  
Gas Phase ◽  
Ion Molecule Reactions ◽  
Gas Phase Ion
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