Massenspektroskopische Untersuchungen an 2,5-Diaryl-1-(arylimino)-1λ4,2,5-thiadia-zolidin-3,4-dionen

The mass spectra of 2,5-diaryl-1-(arylimino)-1λ⁴,2,5-thiadiazolidin-3,4-diones have been examined. Some fragmentations are explained by rearrangement of the title compounds to 1,3-(diarylimino)-5-aryl-1λ⁴,2,5-thioxazolidin-4-ones and 1-oxo-2,5-diaryl-3-(arylimino)-1λ⁴,2,5-thiadiazolidin-4-ones.