Aspects of mass spectra of organic compounds. Part V. Some phenazines

The mass spectra of phenazine and a number of substituted phenazines have been examined. The substituted phenazines generally fragment by initial loss of substituents, and different effects were observed depending on the relative positions of the substituents in the same or different rings. Phenazine itself loses the central nitrogen atoms first as cyanide radicals or as hydrogen cyanide, but substituted phenazines only suffered similar losses after elimination of the substituents.