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Synthesis and mass spectral fragmentation patterns of some new heterocyclic bis-carboxamides

The electron impact mass spectra of some newly synthesized heteropolycyclic bis-carboxamides ared disscussed. The dominant peak in all this spectra are formed by thr cleasvage of C-N bond on one side of the anilino group with the formation of fragment ion m/z 195 as the base peak. Cleavage of the C-N bond with charge retention on nitrogen leads to characteristic ions in some cases.

synthesis ; mass spectral fragmentation patterns ; bis-carboxamides

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