Mass spectra of some azomethines of 5-amino-2-phenylindole series

The mass spectra of some azomethines of 5-amino-2-phnylindole have been recorded and their structures have been elucidated. The general fragmentations of these azomethines in mass spectra were suggested and discussed. It has shown that the main direction of fragmentation was the cleavage of C–N bond between indole ring and azomethine bond –CH=N– lead to form fragment ion at m/z 192 (direction A).