Study of tautomeric transformations of 1,4,5,8-tetraaminoanthraquinone by electronic spectroscopy

Based on the example of 1,4,5,8-tetraamino-9,10-anthraquinone, a method is described for establishing the tautomeric compositions and sequences of tautomeric transformations that occur in known samples of quinones. An analysis of electronic absorption spectra shows that this substance is a dynamic equilibrium mixture of 4,5,8,9-tetraamino-1,10-anthraquinone and the imines tautomeric to it. The tautomeric compositions of different samples of matter differ and can contain 1,4,8-triamino-5-hydroxy-9,10- anthraquinone-10-imine, 4,8,9-triamino-10-hydroxy-1,5-anthraquinone-5-imine, 5,8-diamino-4,9-dihydroxy- 1,10-antraquinonediimine, and 8,10-diamino-5,9-dihydroxy-1,4- antraquinonediimine. Tautomeric equilibrium shifts can accompany not only chemical reactions but physical processes as well, so any investigation of the properties of substances without establishing their tautomeric compositions would be incorrect. © Pleiades Publishing, Ltd., 2013.

Authors
Number of issue
4
Language
English
Pages
623-627
Status
Published
Volume
87
Year
2013
Organizations
  • 1 Peoples' Friendship University, Moscow, Russian Federation
Keywords
1 4 5 8-tetraaminoanthraquinone; Correlation analysis; Electronic absorption spectra; Quantum-chemical calculations; Rotational isomerism; Tautomeric composition; Tautomerism
Date of creation
19.10.2018
Date of change
19.10.2018
Short link
https://repository.rudn.ru/en/records/article/record/2098/
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