Conclusions
Increases of effective volume of the alkyl group in the series of alkyl phenyl ethers does not lead to any decrease of π-donor properties of the oxygen atom except in the case of the last member of the series investigated, tert-butoxybenzene; in contrast, in the series of alkyl phenyl sulfides, sharp inhibition of conjugation is observed even in isopropylthiobenzene, and in tert-butylthiobenzene, the sulfur atom manifests weak π-acceptor properties.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 5, pp. 1053–1059, May, 1983.
The authors wish to thank V. A. Chertkov for assistance in performing the experiment and discussion of the results that were obtained.
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Krivdin, L.B., Donskikh, V.I., Kalabin, G.A. et al. Study of conjugation effects by means of NMR spectroscopy 21. Factor analysis of NMR parameters of alkyl phenyl ethers and sulfides. Russ Chem Bull 32, 953–958 (1983). https://doi.org/10.1007/BF00956145
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DOI: https://doi.org/10.1007/BF00956145