+++4 статьи

[natalija]

Уважаемые коллеги помогите со статьями!!!!!
1. Infrared spectra of flavones and isoflavones: Effect of iodine and boron trifluoride on carbonyl frequencies
C. I. Jose, P. S. Phadke and A. V. Rama Rao
Spectrochimica Acta Part A: Molecular Spectroscopy
Volume 30, Issue 6, June 1974, Pages 1199-1206

DOI:

http://dx.doi.org/10.1016/0584-8539(74)80102-9

2. Physical and chemical properties of hydroxyflavones. IV. Infrared absorption spectra of dihydroxyflavones containing the 5-hydroxyl group†
J. H. Looker, W. W. Hanneman, S. A. Kagal, J. I. Dappen, J. R. Edman
Journal of Heterocyclic Chemistry
Volume 3,Issue 1, pages 55–60,March 1966

DOI:

http://dx.doi.org/10.1002/jhet.5570030112

3. Ultraviolet absorption of flavonoids IV. Protonation constants of some monohydroxy flavones
N. N. Pogodaeva and N. A. Tyukavkina
CHEMISTRY OF NATURAL COMPOUNDS
Volume 9, Number 1, 22-24,

DOI:

http://dx.doi.org/10.1007/BF00580881

4. Ultraviolet absorption of flavonoids II. Ionization constants of 7- and 4′-hydroxy derivatives of flavone and flavonol
N. A. Tyukavkina and N. N. Pogodaeva
CHEMISTRY OF NATURAL COMPOUNDS
Volume 7, Number 1, 8-11,

DOI:

http://dx.doi.org/10.1007/BF01032014

Заранее спасибо

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[macro]

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