Electron impact mass spectrometry of some unsubstituted and chlorine-substituted bisnaphthalimides and related synthons

The electron impact induced fragmentations of some unsubstituted and chlorine‐substituted naphthalimides and bisnaphthalimides are discussed in detail with the aid of B/E and B2/E linked‐scans for metastable ion analysis and collisional activation experiments. In the case of bisnaphthalimides the more important primary decomposition routes are related to cleavages of the alkyl chain.