Abstract
The stability of the molecules of substituted 4-aminouracils with respect to electron impact depends on three factors: the ratio of the various tautomeric forms of the excited molecular ion, the stabilizing effect of electron-donor substituents bonded to the nitrogen atoms in the uracil molecule, and the possibility of the existence of intramolecular hydrogen bonding in the molecular ion. The latter factor is due to the development of the corresponding conformation.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 5, pp. 697–701, May, 1974.
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Khmel'nitskii, R.A., Klyuev, N.A., Kunina, E.A. et al. Mass spectra and structure of 4-aminouracils. Chem Heterocycl Compd 10, 604–608 (1974). https://doi.org/10.1007/BF00471339
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DOI: https://doi.org/10.1007/BF00471339