Electron paramagnetic resonance studies of riboflavin and its derivatives. I. The isoalloxazine semiquinones in acid

Electron paramagnetic resonance studies of riboflavin and its derivatives. I. The isoalloxazine semiquinones in acid

EPR spectra of a number of isoalloxazine semiquinones in HCl and DCl solutions have been obtained. An interpretation of the structure of these radical ions has been developed which permits a complete explanation of the spectra in terms of unpaired spin densities at various positions in the molecule....

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Veröffentlicht in:Archives of biochemistry and biophysics 1963-11, Vol.103 (2), p.231-243
Hauptverfasser: Guzzo, Anthony V., Tollin, Gordon
Format: Artikel
Sprache:eng
Schlagworte:
Chemical Phenomena
Chemistry
Electron Spin Resonance Spectroscopy
Flavins
Heterocyclic Compounds
Old Medline
Riboflavin
Spectrum Analysis
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Zusammenfassung:EPR spectra of a number of isoalloxazine semiquinones in HCl and DCl solutions have been obtained. An interpretation of the structure of these radical ions has been developed which permits a complete explanation of the spectra in terms of unpaired spin densities at various positions in the molecule. We have compared these results with values for electron densities calculated using Hückel molecular orbital theory.
ISSN:0003-9861
1096-0384
DOI:10.1016/0003-9861(63)90400-4