The influence of fluorine substitution on the fragmentation processes of some substituted isoxazoles has been studied by comparing the electron-impact-induced mass spectrometric behaviour of some 5-monofluoromethyl-3,4-disubstituted isoxazoles with that of the corresponding 5-methyl analogs. Some interesting and unusual cleavages have been detected and a rationale has been developed for them on the basis of metastable ion studies and accurate mass measurements. Evidence has been found of the influence of fluorine in the stabilization of molecular and fragment ions.

A comparison of the fragmentation patterns of 5-fluoromethyl-3,4-disubstituted isoxazoles and 5-methyl analogs

BRAVO, PIERFRANCESCO;RESNATI, GIUSEPPE
1993-01-01

Abstract

The influence of fluorine substitution on the fragmentation processes of some substituted isoxazoles has been studied by comparing the electron-impact-induced mass spectrometric behaviour of some 5-monofluoromethyl-3,4-disubstituted isoxazoles with that of the corresponding 5-methyl analogs. Some interesting and unusual cleavages have been detected and a rationale has been developed for them on the basis of metastable ion studies and accurate mass measurements. Evidence has been found of the influence of fluorine in the stabilization of molecular and fragment ions.
1993
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/655566
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 2
  • ???jsp.display-item.citation.isi??? 2
social impact