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Chemistry of Heterocyclic Compounds

, Volume 9, Issue 1, pp 51–54 | Cite as

Structure of 2,3- and 2,5-dihydroxypyridines

  • V. T. Grachev
  • B. E. Zaitsev
  • K. M. Dyumaev
  • L. D. Smirnov
  • M. R. Avezov
Article

Abstract

On the basis of an analysis of the UV and IR spectra, it was established that 2,3- and 2,5-dihydroxypyridines exist in different forms in neutral, acid, and alkaline media. The electronic absorption spectra of the neutral forms of the molecules and the distribution of the π-electron charges in them were calculated by means of the Pariser—Parr—Pople (PPP) MO method. A comparison of the results of the calculations with the experimental UV spectroscopic data demonstrated that the calculations correctly predict the number of π→π* absorption bands in the accessible region of the UV spectra and their positions and relative intensities.

Keywords

Organic Chemistry Absorption Spectrum Absorption Band Relative Intensity Electronic Absorption 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Consultants Bureau, a division of Plenum Publishing Corporation 1975

Authors and Affiliations

  • V. T. Grachev
    • 1
    • 2
  • B. E. Zaitsev
    • 1
    • 2
  • K. M. Dyumaev
    • 1
    • 2
  • L. D. Smirnov
    • 1
    • 2
  • M. R. Avezov
    • 1
    • 2
  1. 1.Scientific-Research Institute of Organic Intermediates and DyesMoscow
  2. 2.Institute of Chemical PhysicsAcademy of Sciences of the USSRMoscow

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