scholarly journals Unconventional hydrogen bonding to organic ions in the gas phase: Stepwise association of hydrogen cyanide with the pyridine and pyrimidine radical cations and protonated pyridine

2014 ◽  
Vol 141 (5) ◽  
pp. 054305 ◽  
Author(s):  
Ahmed M. Hamid ◽  
M. Samy El-Shall ◽  
Rifaat Hilal ◽  
Shaaban Elroby ◽  
Saadullah G. Aziz
Keyword(s):  
Hydrogen Bonding ◽  
Gas Phase ◽  
Hydrogen Cyanide ◽  
Radical Cations ◽  
Organic Ions

Unconventional CHδ+⋯N hydrogen bonding interactions in the stepwise solvation of the naphthalene radical cation by hydrogen cyanide and acetonitrile molecules

2016 ◽  
Vol 18 (4) ◽  
pp. 2580-2590 ◽  
Author(s):  
Sean P. Platt ◽  
Isaac K. Attah ◽  
M. S. El-Shall ◽  
Rifaat Hilal ◽  
Shaaban A. Elroby ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Gas Phase ◽  
Radical Cation ◽  
Hydrogen Cyanide ◽  
Hydrogen Bonding Interactions

Solvation of the naphthalene radical cation by HCN and CH3CN molecules in the Gas Phase.

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>

Sign in / Sign up

Export Citation Format

Share Document