Spectres de Masse d'Imides Cycliques

✍ Scribed by A. Maquestiau; P. Lejeune

• Publisher: Wiley (John Wiley & Sons)
• Year: 2010
• Weight: 373 KB
• Volume: 78
• Category: Article
• ISSN: 0037-9646
• DOI: 10.1002/bscb.19690780701

✦ Synopsis

SPECTRES DE MASSE D'IMIDES CYCLIQUES

A. MAQUESTIAU et P. LEJEUNE

The mass spectra of 14 cyclic imides have been recorded. These spectra allowed us to draw following conclusions:

a) The fragmentation pattern of the cyclic imides studied bear strong analogies with those previously derived from a study of cyclic /3-diketones. These results suggest preferential ionization of the oxygen instead of the nitrogen atom. Provided metastable peaks are observed for the reactions M+'+(M-RNCO)+'and M+'-+C,NO,+,

b)

it is possible to differentiate imides substituted on the nitrogen atom from the unsubstituted one. The explanation for such a behaviour of cyclic imides, under electron impact, is to be found in the conjugation of molecular orbitals, as are the acidic properties of these molecules.