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


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.


Flavonoid Flavone Phloroglucinol Chrysin Ionization Constant 


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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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