Abstract
Symmetric 2-pyrylo- and asymmetric (indo)(2-pyrylo)trimethinecyanines with substituents of different electronic nature in the pyran residue were synthesized. The influence of the conjugation effect and inductive effect on the characteristics of absorption bands of the synthesized dyes was analyzed by a quantum chemical calculation according to a common MO Hückel method.
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For Communication 22, see [1].
Translated from Khimiya Geterotsiklicheskikh Soedinenii No. 12, pp. 1607–1613, December, 1986.
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Boiko, I.I., Derevyanko, N.A., Ishchenko, A.A. et al. Pyrylocyanines. 23. 2-Pyrylocarbocyanines with substituents in hetero residues. Chem Heterocycl Compd 22, 1295–1300 (1986). https://doi.org/10.1007/BF00474347
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DOI: https://doi.org/10.1007/BF00474347