ELECTRON-IMPACT MASS-SPECTROMETRY OF 2-ARYL-THIAZOLIDINE-4-CARBOXYLICACIDS

The mass spectrometric behaviour of 11 2-aryl-thiazolidine-1-carboxyli c acids has been studied under electron impact conditions, On the basi s of our high- and low-resolution measurements, deuterium labelling ex periments and collision-induced dissociation studies the main fragment ation pathways have been established. In the high resolution spectrum of 2-phenyl-thiazolidine-4-carboxylic acid several peaks were found to be doublets. Some of the chemical formulae were unexpected. With the help of tandem mass spectrometry the formation of these ions was expla ined.