Abstract
The 1H and 13C NMR spectra of the E and Z isomers of 2-, 3-, and 4-benzoylpyridine oximes and their ethers were analyzed thoroughly, and the 1H-13C spin-spin coupling constants (SSCC) were determined. It was established that the magnitude of the γ effect for the quaternary carbon atoms in the E and Z isomers depends on the site of substitution in the pyridine ring. It was assumed that the intermolecular hydrogen bond is stronger in the E form than in the Z form. The existence of the Z isomer of 2-benzoylpyridine oxime in deuterochloroform with an intramolecular hydrogen bond was proved.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 203–208, February, 1990.
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Lezina, V.P., Rozenberg, S.G., Glozman, O.M. et al. Study of three-dimensional structures of benzoylpyridine oximes and their ethers by 1H and 13C NMR spectroscopy. Chem Heterocycl Compd 26, 172–178 (1990). https://doi.org/10.1007/BF00499411
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DOI: https://doi.org/10.1007/BF00499411