Conclusions
The behavior of absorption bands was examined for compounds with three-atom conjugated systems. The applicability of Dewar's rule was shown for compounds with carbon, nitrogen, oxygen, and fluorine. The proper prediction of the band behavior for other compounds requires consideration of the resonance integrals, unoccupied orbitals, and changes in the direction of electron cloud migration.
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Literature cited
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1407–1409, June, 1989.
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Petukhov, V.A. Electronic spectra of compounds with a three-atom conjugated system. Russ Chem Bull 38, 1287–1289 (1989). https://doi.org/10.1007/BF00957175
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DOI: https://doi.org/10.1007/BF00957175