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Mass Spectral Fragmentation Patterns of N,N′-Alkylidene and N,N′-Arylidene Bisamides

✍ Scribed by R. Martínez Alvarez; A. Herrera Fernández; T. Morales Abajo

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
97 KB
Volume
11
Category
Article
ISSN
0951-4198

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✦ Synopsis

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.

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## JMS Letters Dear Sir, ## Mass Spectral Fragmentation of N1,N1-Dimethyl-N2azinylformamidines Polyfunctional nitrogen ligands present very interesting properties. In particular, they exhibit exceptionally high basicity. In many cases chelation of the proton by two basic nitrogen atoms is possi