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The Use of Electron Paramagnetic Resonance in Organic Chemistry
Author(s) -
Schneider F.,
Mobius K.,
Plato M.
Publication year - 1965
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.196508561
Subject(s) - electron paramagnetic resonance , chemistry , radical , intramolecular force , hyperfine structure , photochemistry , ionic bonding , electronegativity , pulsed epr , atomic physics , nuclear magnetic resonance , ion , organic chemistry , spin echo , medicine , physics , magnetic resonance imaging , radiology
The more recent applications of electron paramagnetic resonance (EPR) to organic chemistry include the investigation of triplet states, donor‐acceptor complexes, short‐lived free‐radical intermediates, and reaction kinetics. The principles of the theoretical calculations required to obtain the maximum information from EPR spectra are outlined for free radicals containing π‐electron systems. EPR intensities, line widths, hyperfine splitting, and g factors permit the determination of free‐radical yields, ionic charges, rotation frequencies in rotamers, electron density distributions, electronegativities, intramolecular torsion angles, solvent effects (resulting from hydrogen bonding), and π‐orbital energies. – The production of free radicals with the aid of initiation reaction in flow systems, by irradiation, and by electrolysis seems particularly promising.