Abstract
By an analysis of the IR spectra of solutions of aminoanthrapyridones in chloroform it was demonstrated that the primary and secondary amino groups in the 1 and 6 positions form an intermolecular hydrogen bond with the CO groups; the amino groups in the 6 position form a stronger hydrogen bond. An anomalous form of the absorption band of the stretching vibrations of the NH group was detected in the IR spectrum of 6-n-hexylamino-3-ethylanthrapyridone. The long-wave band in the electronic spectra of aminoanthrapyridone is related to the band of charge transfer of the unshared pair of electrons of the amino nitrogen atom to the π system of the rings.
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Communication VI from the series “Structures and Properties of Dyes.” See [1] for communication V.
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1357–1363, October 1974.
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Zaitsev, B.E., Mikhailova, T.A. & Kazankov, M.V. Spectroscopic study of hydrogen bonding in aminoanthrapyridones. Chem Heterocycl Compd 10, 1185–1191 (1974). https://doi.org/10.1007/BF00470160
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DOI: https://doi.org/10.1007/BF00470160