Gas-Phase Reactivity of Copper Cations with Ketones

2001 ◽  
Vol 7 (4-5) ◽  
pp. 313-320 ◽  
Author(s):  
P. Fordham ◽  
M. Deschasse ◽  
V. Haldys ◽  
J. Tortajada ◽  
J.-P. Morizur
Keyword(s):  
Gas Phase ◽  
Copper Ions ◽  
Ion Molecule Reactions ◽  
Fragmentation Mechanisms ◽  
Dehydration Reactions ◽  
Ion Kinetic Energy ◽  
The Rich ◽  
Fragmentation Patterns ◽  
Gas Phase Ion ◽  
Chemical Ionisation

Gas-phase ion–molecule reactions between copper ions and ketones were investigated. Organometallic adducts were prepared using a chemical ionisation/fast-atom bombardment source. Abundant pseudo-molecular ion adducts were observed in the Cu+-chemical ionisation mass spectra and their unimolecular decompositions were studied by tandem mass spectrometry. Mass-analysed ion kinetic energy spectroscopy revealed diagnostic fragmentation patterns. Losses of alkenes, losses of alkanes and dehydrogenation and dehydration reactions were observed, as well as eliminations of CuR (R = C nH2 n + 1). The rich reaction chemistry of the cationised ketones enabled differentiation of the majority of the linear and branched ketone isomers studied. Isotope-labelled derivatives were employed to elucidate fragmentation mechanisms.

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

Gas-phase ion-molecule reactions of dioxygen anion radical (O2-.bul.)

1985 ◽  
Vol 107 (14) ◽  
pp. 4123-4128 ◽  
Author(s):  
Richard N. McDonald ◽  
A. Kasem Chowdhury
Keyword(s):  
Gas Phase ◽  
Anion Radical ◽  
Ion Molecule Reactions ◽  
Gas Phase Ion

scholarly journals In-source CID of guanosine: Gas phase ion-molecule reactions

2006 ◽  
Vol 17 (8) ◽  
pp. 1050-1062 ◽  
Author(s):  
Robin Tuytten ◽  
Filip Lemière ◽  
Eddy L. Esmans ◽  
Wouter A. Herrebout ◽  
Benjamin J. Veken ◽  
...  
Keyword(s):  
Gas Phase ◽  
Ion Molecule Reactions ◽  
Gas Phase Ion
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