Mass spectrometric identification of ring-chain tautomers of 4-cyano-3-pyrazolidones in the gas phase

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.

How to Cite
Ovcharenko, V. V.; Terent'ev, P. B.; Avetisyan, A. A.; Kagramanyan, A. A. Chem. Heterocycl. Compd. 1995, 31, 1323. [Khim. Geterotsikl. Soedin. 1995, 1525.]

For this article in the English edition, see DOI https://doi.org/10.1007/BF01168627