Conclusions
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1.
The 3p orbital of sulfur does not enter into π conjugation with a fluorinated benzene ring.
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2.
Nitrogen, in the ring and directly connected with the sulfur, can function as either a π donor or a σ acceptor with respect to the latter. The donor activity of the nitrogen is markedly reduced by the introduction of an oxygen heteroatom into the ring. The SL spectra of these compounds show the presence of an appreciable electron density on the 3d AO of the sulfur. The 3d (S) orbital is not populated in the other compounds studied here.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 2, pp. 343–349, February, 1979.
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Dolenko, G.N., Krupoder, S.A., Mazalov, L.N. et al. A study of the electronic structures of polyfluoroaromatic compounds of divalent sulfur by X-ray fluorescence spectroscopy. Russ Chem Bull 28, 315–321 (1979). https://doi.org/10.1007/BF00925875
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DOI: https://doi.org/10.1007/BF00925875