Abstract
Derivatives of 3-imidazoline 3-oxide have been studied by 14N and 17O NMR methods. Regularities of the influence of substituents and of a hydrogen bond on chemical shifts have been made apparent. The range of changes of the chemical shifts of the nitrogen and oxygen nuclei of the nitrone group has been determined. Both in the 17O and in the 14N NMR spectra the signals of the amino derivatives are the highest field signals for the nitrone group, and the lowest field signals are the signals of the cyano derivatives in the series of derivatives investigated. Depending on the substituent (from amino to cyano group) the 17O chemical shifts varied over a range ∼155 ppm, but the interval of change of the 14N chemical shifts for the same substituents was ∼110 ppm.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1336–1341. September, 2005.
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Grigor'ev, I.A., Voinov, M.A. & Fedotov, M.A. NMR Spectra of Cyclic Nitrones. 7. The Influence of Substituents and a Hydrogen Bond on 14N and 17O Chemical Shifts in Derivatives of 3-Imidoazoline 3-Oxide. Chem Heterocycl Compd 41, 1134–1138 (2005). https://doi.org/10.1007/s10593-005-0292-3
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DOI: https://doi.org/10.1007/s10593-005-0292-3