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Pyrylocyanines

V. Unsymmetrical 2,6-phenyl-substituted pyrylo-, thtopyrylo-, and selenopyrylocyanines

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Chemistry of Heterocyclic Compounds Aims and scope

Abstract

Unsymmetrical 2,6-diphenyl-substituted pyrylo-, thiopyrylo-, and selenopyrylotrimethine-cyanines containing 1,3,3-trimethylindolinium or 3-methylbenzothiazolium nuclei have been synthesized. From the values of the deviations calculated from the long-wave absorption maxima and by the method of “bond moments,” it follows that in the polymethine dyes the basicities of the heterocycles rise in the sequence: selenopyrylium < thiopyrylium < pyrylium. In view of the high electronic asymmetry of the dyes synthesized, in the long-wave bands of the absorption spectrum the strongest are the maxima corresponding to the first vibrational sublevel.

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Authors and Affiliations

  1. Institute of Organic Chemistry, Academy of Sciences of the Ukrainian SSR, Kiev

    A. I. Tolmachev, M. A. Kudinova & N. A. Derevyanko

Authors
  1. A. I. Tolmachev
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  2. M. A. Kudinova
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  3. N. A. Derevyanko
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Additional information

For Communication IV, see [1].

Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 53–57, January, 1974.

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Tolmachev, A.I., Kudinova, M.A. & Derevyanko, N.A. Pyrylocyanines. Chem Heterocycl Compd 10, 45–49 (1974). https://doi.org/10.1007/BF00475906

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  • DOI: https://doi.org/10.1007/BF00475906

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