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Mass Spectral Fragmentation Patterns of N,N ′‐Alkylidene and N,N ′‐Arylidene Bisamides
Author(s) -
Alvarez R. Martínez,
Fernández A. Herrera,
Abajo T. Morales
Publication year - 1997
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/(sici)1097-0231(19970115)11:1<85::aid-rcm805>3.0.co;2-e
Subject(s) - chemistry , fragmentation (computing) , mass spectrum , cleavage (geology) , ion , electron ionization , nitrogen atom , molecule , carbon atom , bond cleavage , mass spectrometry , nitrogen , polyatomic ion , medicinal chemistry , analytical chemistry (journal) , organic chemistry , chromatography , ionization , group (periodic table) , catalysis , ring (chemistry) , computer science , geotechnical engineering , fracture (geology) , engineering , operating system
The electron impact mass spectra of several gem ‐bisamides are studied. The dominant peaks in the spectra of alkylidene and arylidene bisalkylamides are formed by the cleavage of the C—N bond of the amido group with charge retention on the nitrogen atom. This fragmentation, followed by the loss of a neutral molecule, leads to characteristic immonium ions as the base peaks. In contrast, alkylidene and arylidene bisarylamides undergo cleavage of the C—N bond with charge retention on the carbon atom, leading to the benzoyl ion C 6 H 5 CO + as the dominant peak. © 1997 John Wiley & Sons, Ltd.