Study of the products of oxidative rearrangement in the indole series by mass spectrometry

The principle pathways of dissociative ionization upon electron impact of 3-substituted 3-benzoylindoles are discussed. Alternative localization of the positive charge on the N or O atoms of the molecular ion determines the most probable pathways of its disintegration. The isomerization of the molecular ion and the existence of tautomeric forms in the starting molecule or in the molecular ion promote the appearance of low-intensity peaks that are valuable for identification purposes.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1240–1244, September, 1974.