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Absorption spectra

XVIII. Nature of the long-wave band of the Z isomers of photochromic aurones, thioindogenides, and selenoindogenides

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Chemistry of Heterocyclic Compounds Aims and scope

Abstract

The first band in the absorption spectra of the Z isomers of aurones, thioindogenides, and selenoindogenides is due to an electronic transition that is associated primarily with charge redistribution on the heteroatom and the carbonyl group. The effect of a substituent in the 4′ position plays a secondary role. The low sensitivity of the spectra of selenoindogenides to the effect of substituents is due to the saturation of the acceptor center (carbonyl group) by electrons drawn off from the heteroatom during interaction of the 2π z electrons of selenium with the π system of the molecule.

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Literature cited

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Authors and Affiliations

  1. Rubezhnoe Branch of the Scientific-Research Institute of Organic Intermediates and Dyes, USSR

    G. A. Yugai & M. A. Mostoslavskii

Authors
  1. G. A. Yugai
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  2. M. A. Mostoslavskii
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Additional information

See [1] for communication XVII.

Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1032–1035, August, 1976.

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Yugai, G.A., Mostoslavskii, M.A. Absorption spectra. Chem Heterocycl Compd 12, 854–857 (1976). https://doi.org/10.1007/BF00510099

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  • DOI: https://doi.org/10.1007/BF00510099

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