Abstract
Fragmentation patterns resulting from electron impact ionisation of hitherto unknown eight tri-substituted (N-alkyl, N-aryl N′-heteroaryl) and two di-substituted (N-adamantyl, N′-heteroaryl) guanidines were studied. Some major fragment ions observed in the spectra were interpreted and fragmentation patterns involving expulsion of neutral N-alkyl carbodiimide from the molecular ion (in the case of tri-substituted guanidines) were proposed. No such expulsion (carbodiimide elimination) took place in the di-substituted guanidines.
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