Spectral characteristics and acid-base equilibria of 4,9-dihydroxy-5,10-dioxo-4,5,9,10-tetrahydro-4,9-diazapyrene and its 2,7-derivatives

The IR and electronic spectra of 2,7-disubstituted 4,9-dihydroxy-5,10-dioxo-4,5,9,10-tetrahydro-4,9-diazapyrene (R = H, I, NH2, NO2, OH) are studied. Analysis of the IR bands shows that, in crystalline form and in neutral and basic solutions, the compounds exist predominantly in the hydroxamic form. It is established that in sulfuric acid solutions the oxygen atoms of the C=O groups are protonated. The spectral characteristics of the neutral and ionized forms of the compounds are determined. The acid ionization constants are measured by potentiometric titration. © 1993 Plenum Publishing Corporation.

Редакторы
-
Издательство
Латвийский институт органического синтеза Латвийской академии наук / Springer New York Consultants Bureau
Номер выпуска
1
Язык
Английский
Страницы
81-86
Статус
Опубликовано
Подразделение
-
Номер
-
Том
29
Год
1993
Организации
  • 1 Russian University of People's Friendship, Moscow, 117198, Russian Federation
Ключевые слова
-
Дата создания
19.10.2018
Дата изменения
19.10.2018
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/1017/