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Chemistry of Natural Compounds

, Volume 6, Issue 1, pp 20–23 | Cite as

Ultraviolet absorption of flavonoids

I. Ionization constants of tectochrysin and chrysin
  • N. A. Tyukavkina
  • N. N. Pogodaeva
  • V. I. Lutskii
Article

Conclusions

The ionization constants of the 5-hydroxy groups in tectochrysin and chrysin have been determined spectrophotometrically, being 2.09×10−12 and 8.91×10−10, respectively. The 7-hydroxy group of chrysin has an ionization constant of 3.8 × 10−8.

Keywords

Flavonoid Flavone Phloroglucinol Chrysin Ionization Constant 

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References

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    L. Jard, The Chemistry of Flavonoid Compounds, Bd, T. A. Geissmann, Pergamon Press., 107, 1962.Google Scholar
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    J. B. Harborne, Methods in Polyphenol Chemistry, London-New York, 13, 1964.Google Scholar
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    V. M. Peshkova and M. I. Gromova, Practical Handbook on Spectrophotometry and Colorimetry [in Russian], Moscow, 41, 1961.Google Scholar
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    A. Albert and E. Serjeant, Ionization Constants of Acids and Bases [Russian translation], Khimiya, Moscow-Leningrad, 68, 1964.Google Scholar
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    N. A. Tyukavkina, V. I. Lutskii, A. K. Dzizenko, and V. A. Pentegova, KhPS [Chemistry of Natural Compounds], 4, 249, 1968.Google Scholar
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    L. Fieser and M. Fieser, Organic Chemistry [Russian translation], Khimiya, Moscow, 271, 1966.Google Scholar

Copyright information

© Consultants Bureau 1972

Authors and Affiliations

  • N. A. Tyukavkina
    • 1
  • N. N. Pogodaeva
    • 1
  • V. I. Lutskii
    • 1
  1. 1.Irkutsk Institute of Organic Chemistry, Siberian Division, AS USSRUSSR

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