Mass spectra of some alkyl- and phenyl-substituted thiazoles

The mass spectra of a number of alkyl- and methyl-phenyl-substituted thiazoles at various ionizing electron energies were studied. The predominant disintegration reactions are processes involving contraction of the starting ring to form charged sulfur-containing fragments and nitrogen-containing neutral particles. It was noted that the peaks of the (M-H)⁺and (M-CH₃)⁺ ions are of low intensity, that the probability of rearrangement processes with ring expansion is low, and that the position of the methyl groups has a pronounced effect on the disintegration of the molecules during electron impact.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1372–1377, October, 1971.