Abstract
Analysis of the electron impact mass spectra of a series of 4-cyano-3-pyrazolidones, which manifest ring-chain tautomerism in polar solvents, showed that these compounds also exist in the gas phase as a mixture of tautomers, which undergo characteristic fragmentation. The quantitative tautomer ratio in this series is a function of electronic and steric substituent effects. The fragmentation pathways for each of the tautomers were determined using high-resolution mass spectrometry.
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References
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Additional information
M. V. Lomonosov Moscow State University, 119899 Moscow. Yerevan State University, 375025 Yerevan. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp 1525–1530, November, 1995 Original article submitted November 1, 1995.
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Ovcharenko, V.V., Terent'ev, P.B., Avetisyan, A.A. et al. Mass spectrometric identification of ring-chain tautomers of 4-cyano-3-pyrazolidones in the gas phase. Chem Heterocycl Compd 31, 1323–1327 (1995). https://doi.org/10.1007/BF01168627
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DOI: https://doi.org/10.1007/BF01168627