Mass spectral fragmentation of some cycloalkane‐condensed 4,5‐dihydro‐3(2H)‐pyridazinones and 4,5‐dihydro‐6H‐1,2‐oxazin‐6‐ones

Esa Mäki, G. Stájer, Ferenc Csende, Pirjo Vainiotalo, Kalevi Pihlaja

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The electron ionization mass spectra of 10 cycloalkane‐condensed 4,5‐dihydro‐3(2H)‐pyridazinones and four cycloalkane‐condensed 4,5‐dihydro‐6H‐1,2‐oxazin‐6‐ones were studied. The molecular ions of these compounds were very stable and in most cases formed the base peaks of the spectra. Otherwise the spectra of compounds having different fused cycloalkane rings deviated considerably from each other. The spectra of cis‐ and trans‐fused cyclohexane derivatives showed characteristic differences.

Original languageEnglish
Pages (from-to)1021-1025
Number of pages5
JournalRapid Communications in Mass Spectrometry
Issue number12
Publication statusPublished - 1994


ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy
  • Organic Chemistry

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