Conclusions
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1.
Parameters of the1H,13C,17O,77Se, and125Te NMR spectra have been obtained for divinyl chalcogenides. Estimates have been made of the effective group electronegativities and the resonance constants of the XCH=CH2 and XCH2CH3 groups, with X=O, S, SO, SO2, Se, and Te.
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2.
In the interaction with the unsaturated fragment, for the Group VI-A heteroatoms, theπ-donor effect predominates, decreasing in the series O>S>Se>Te;π-acceptor interaction is manifested in the series of sulfoxides and sulfones.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2507–2512, November, 1981.
For preceding communication, see [1].
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Bzhezovskii, V.M., Kushnarev, D.F., Trofimov, B.A. et al. Study of conjugation effects by means of NMR spectroscopy. 13. NMR spectra of divinyl chalcogenides. Russ Chem Bull 30, 2073–2077 (1981). https://doi.org/10.1007/BF01094632
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DOI: https://doi.org/10.1007/BF01094632