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Chemistry of Heterocyclic Compounds

, Volume 44, Issue 8, pp 924–930 | Cite as

Electronic absorption spectra of pyrylium and benzodihydrochromenylium salts

  • A. M. Burov
  • N. V. Pchelintseva
  • O. V. Fedotova
Article
  • 75 Downloads

Abstract

The electronic absorption spectra of benzodihydrochromenylium, tetrahydrochromenylium, and dichloropyrylium salts were studied for the first time. It was noticed that intramolecular charge transfer takes place mainly between the substituent at position 4 of the pyrylium ring and the π-system of the cation as a whole, while the bathochromic shift depends substantially on the geometry of the molecule. It was shown that the chlorine atoms have an effect on the form of the spectra when they are introduced into the ring of the pyrylium cation and into the aryl substituents.

Keywords

1,5-diketones benzodihydrochromenylium salts chlorine-substituted pyrylium salts intramolecular charge transfer 

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Copyright information

© Springer Science+Business Media, Inc. 2008

Authors and Affiliations

  • A. M. Burov
    • 1
  • N. V. Pchelintseva
    • 1
  • O. V. Fedotova
    • 1
  1. 1.N. G. Chernyshevskii Saratov State UniversitySaratovRussia

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