Chemistry of Heterocyclic Compounds

, Volume 9, Issue 7, pp 888–890 | Cite as

Absorption spectra of some pyridine and pyridine N-oxide derivatives in oleum

  • K. M. Dyumaev
  • N. P. Vinogradova
  • R. E. Lokhov
  • G. S. Elinson


The absorption spectra of a number of pyridlne and pyridine N-oxide derivatives in media of different acidity functions have been investigated. The bathochromic shift of the shortwave absorption band in oleum is interpreted as a consequence of the addition of a proton to the conjugate acid. The formation of a hydrogen bond between the 3-hydroxy derivative of the heterocyclic compounds investigated and the oleum, appearing as a hypsochromic shift of the long-wave absorption band, has been detected. This phenomenon is absent in the case of the 2-methoxy derivative.


Hydrogen Hydrogen Bond Absorption Spectrum Absorption Band Pyridine 
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Copyright information

© Plenum Publishing Corporation 1975

Authors and Affiliations

  • K. M. Dyumaev
    • 1
  • N. P. Vinogradova
    • 1
  • R. E. Lokhov
    • 1
  • G. S. Elinson
    • 1
  1. 1.Scientific-Research Institute of Organic Intermediates and DyesMoscow

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