Conclusions
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1.
The location of the tautomeric equilibrium of 1(3)-(4-fluorophenyl)-3(1)-aryltrizenes in THF and pyridine depends mainly on the resonance effects of the substituents.
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2.
The chemical shifts of fluorine in the individual tautomers are linearly related to the Hammett σ constants of the substituents, and the effect of the substituents in the aryl radical on them is additive.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 3, pp. 550–553, March, 1986.
The authors thank A. Ya. Gorelenko for assistance in synthetic work, and A. S. Fridman for assistance in the statistical processing of the results.
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Borisov, E.V., Peregudov, A.S., Postovoi, S.A. et al. Effect of substituents on the tautomeric equilibrium of 1(3)-(4-fluorophenyl)-3(1)-aryltriazenes in THF and pyridine. Russ Chem Bull 35, 499–502 (1986). https://doi.org/10.1007/BF00953213
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DOI: https://doi.org/10.1007/BF00953213