Chemistry of Heterocyclic Compounds

, Volume 8, Issue 4, pp 397–401 | Cite as

π-Electron structure of the nitrofuran system

III. Effect of the medium on the character of the ESR spectra of 5-nitrofuran anion radicals
  • R. A. Gavar
  • L. Kh. Baumane
  • Ya. P. Stradyn'
  • S. A. Giller


The effect of the ionic composition and the concentration of the components of a mixed waterdimethylformamide medium on the π-electron structure of anion radicals of the nitrofuran series was studied. The formation of ion pairs with the cations and hydration of the anion radicals somewhat increase the hyperfine structure constants in their ESR spectra, especially those caused by the nitrogen atom of the nitro group, and this should be taken into account in high-accuracy quantum-chemical calculations. A mathematical description of the change in the hyperfine structure constants in mixed water-dimethylformamide media is given, and a number of empirical regularities that link the magnitudes of the constants with the electronic effects of substituants and media factors are presented.


Nitrogen Hydration Organic Chemistry Nitrogen Atom Anion Radical 
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Copyright information

© Consultants Bureau 1974

Authors and Affiliations

  • R. A. Gavar
    • 1
  • L. Kh. Baumane
    • 1
  • Ya. P. Stradyn'
    • 1
  • S. A. Giller
    • 1
  1. 1.Institute of Organic SynthesisAcademy of Sciences of the Latvian SSRRiga

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