Electronic absorption spectra and structures of the conjugate acids of 5-hydroxy- and 5-aminoanthraquinonepyridines

The structures of 5-hydroxy and 5-amino derivatives of naphtho[2,3-h]quinoline-7,12-dione (anthraquinonepyridine) and their conjugate acids were investigated by experimental and computational [Pariser-Parr-Pople (PPP)] methods. The hydroxy derivative exists in the keto form, while the cation of the hydroxy form is formed during protonation; the amino derivative exists in the amino form but is converted to a cation with an imino structure upon protonation. In both cases the addition of a proton is accompanied by rearrangement of the π-electon structure of the molecules. The assignment of the Sππ* transitions in the electronic spectra of the bases and their conjugate acids is given on the basis of a quantum-chemical calculation. © 1981 Plenum Publishing Corporation.

Editors
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Publisher
Латвийский институт органического синтеза Латвийской академии наук / Springer New York Consultants Bureau
Number of issue
12
Language
English
Pages
1248-1254
Status
Published
Department
-
Number
-
Volume
16
Year
1980
Organizations
  • 1 Patrice Lumumba People's Friendship University, Moscow, 117923, Russian Federation
Keywords
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Date of creation
19.10.2018
Date of change
19.10.2018
Short link
https://repository.rudn.ru/en/records/article/record/1520/