Abstract
The protolytic equilibrium constants of 1-(2′-selenienyl)-3-phenyl-1-propenone, 1-(2′-selenienyl)-3-phenyl-3-propenone, and 1, 3-di (2′-selenienyl) propenone have been measured spectrophotometrically in solutions of sulfuric acid (monohydrate) in glacial acetic acid. The results obtained are compared with data on the basicity of chalcone and its thiophene and furan analogs. It is established that, in heterocyclic analogs of chalcone, five-membered heterocycles containing oxygen, sulfur, and selenium show an electron-donating effect which decreases in the order 2-furyl > 2-selenienyl > 2-thienyl.
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Forpart III, see [12].
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Tsukerman, S.V., Kutulya, L.A., Lavrushin, V.F. et al. Basicity and structure of α,β-unsaturated ketones of the heterocyclic series. Chem Heterocycl Compd 2, 271–275 (1967). https://doi.org/10.1007/BF00742365
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DOI: https://doi.org/10.1007/BF00742365