MASS-SPECTRAL FRAGMENTATION PATHWAYS IN SOME GLYCOLURIL-TYPE EXPLOSIVES - A STUDY BY COLLISION-INDUCED DISSOCIATION AND ISOTOPE LABELING

Electron impact (EI), chemical ionization and negative-ion chemical io nization (NCI) mass spectra of 1,4-dinitroglycoluril (DINGU), its N-15 - and H-2-labeled analogues and the dimethyl-substituted derivatives w ere recorded. Tandem mass spectrometry with collision induced dissocia tion was used to study the fragmentation pathways of these compounds. It was found that the main EI fragmentation processes of DINGU are due to the cleavage of C-N bonds and some rearrangement reactions.