Conclusions
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1.
A series of vinylogs of chalcones p-RC6H4(CH=CH)nCOC6H5 (n=2, 3) were synthesized.
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2.
The frequency of the valence vibrations of the C=O bond for vinylogs of a chalcone depends little on the nature of the substituents.
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3.
The position of the maximum and extinction of the absorption in the UV spectra of p-RC6H5·(CH=CH)nCO·C6H5 (n=1, 3) are little changed by the introduction of negative substituents and are linear functions of the number of double bonds.
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Translated from Izvestiya Akademli Nauk SSSR, Seriya Khimicheskaya, No. 11, p. 2447–2453, November, 1971.
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Yanovskaya, L.A., Umirzakov, B., Yakovlev, I.P. et al. Synthesis and spectral properties of vinylogs of chalcone. Russ Chem Bull 20, 2324–2328 (1971). https://doi.org/10.1007/BF00854306
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DOI: https://doi.org/10.1007/BF00854306