Chemistry of Radical-Ions

2007 ◽  
pp. 323-438 ◽  
Author(s):  
M. Szwarc
Keyword(s):  
Radical Ions

Properties and Reactivity of First and Second Row Hydrides. IV. Interactions Between Hydrides and Their Radical Ions

1993 ◽  
Vol 58 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Rudolf Zahradník
Keyword(s):  
Radical Cations ◽  
Stabilization Energy ◽  
Hydrogen Atom Abstraction ◽  
Type Ii ◽  
Radical Ions ◽  
Reaction Products ◽  
Ion Molecule Reactions ◽  
Heats Of Reaction ◽  
Experimental Values ◽  
Easy Differentiation

The energies and heats of ion-molecule reactions have been calculated (MP4/6-31G**//6-31G** or better level) and compared with the experimental values obtained from the heats of formation. Two main types of reactions have been studied: (i) AHn + AHn+• ↔ AHn+1+ + AHn-1• (A = C to F and Si to Cl), (ii) AHn + BHm+• ↔ AHn+1+ + BHm-1• or AHn-1+• + BHm+1+ (A and B = C to F). In contrast to (i), processes of type (ii) permit easy differentiation between the proton transfer and hydrogen atom abstraction mechanisms. A third type of interaction involves reactions with radical anions (A = Li to F); comparison was made with analogous processes with radical cations. A brief comment is made about the influence of the level of computational sophistication on the energies and heats of reaction, as well as on the stabilization energy of a hydrogen bonded intermediate, a structure which is similar to that of the reaction products.

Electronic structure of radical ions of polycyclic hydrocarbons

1982 ◽  
Vol 18 (2) ◽  
pp. 178-181
Author(s):  
M. M. Mestechkin ◽  
V. N. Poltavets
Keyword(s):  
Electronic Structure ◽  
Radical Ions ◽  
Polycyclic Hydrocarbons

Structure and Reactivity of Radical Ions: New Twist on Old Concepts

ChemInform ◽  
2006 ◽  
Vol 37 (52) ◽  
Author(s):  
Patrick J. Donoghue ◽  
Olaf Wiest
Keyword(s):  
Radical Ions

Chemical Insights from EPR Spectra of Organometallic Radicals and Radical Ions

ChemInform ◽  
2004 ◽  
Vol 35 (18) ◽  
Author(s):  
Anne L. Rieger ◽  
Philip H. Rieger
Keyword(s):  
Epr Spectra ◽  
Radical Ions

Bestimmung von innermolekularen Torsionswinkeln aus Hyperfeinstruktur-Aufspaltungen und g-Faktoren

1965 ◽  
Vol 20 (9) ◽  
pp. 1117-1121 ◽  
Author(s):  
K. Möbius
Keyword(s):  
Electron Diffraction ◽  
Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbons ◽  
Small Amplitude ◽  
Membered Ring ◽  
Radical Ions ◽  
Hydrogen Atoms ◽  
Stereochemical Structure ◽  
X Ray ◽  
Phenyl Rings

The stereochemical structure of aromatic hydrocarbons in solution being overcrowded with hydrogen atoms is not known with certainty, because the conventional X-ray and electron diffraction methods are suitable only for samples in the crystalline and vapor phase. Using EPR spectroscopy for the aromatic hydrocarbon radicals biphenyl (—), phenanthrene (—) and pentaphenylcyclopentadienyl (PPCPD) innermolecular twist and bond angles could be determined by means of hfssplittings and g-factors. Stably solvated biphenyl radical ions are found to have twist angles of 38 ±2°; phenanthrene ions turn out to be planar but change their angles of hybridization at particular positions; in the PPCPD radical the phenyl rings oscillate with small amplitude around planes orthogonal to the five-membered ring.

Inorganic Radical-ions and Their Organic Reactions

1979 ◽  
Vol 48 (11) ◽  
pp. 1055-1075 ◽  
Author(s):  
A F Morkovnik ◽  
O Yu Okhlobystin
Keyword(s):  
Organic Reactions ◽  
Radical Ions
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