It has been shown by exact mass measurements and collision-induced dissociation mass-analysed ion kinetic energy spectra that the structure of the m/z 124 ion observed in the mass spectra of N-(4-methoxyphenyl)thiophene-2-carboxamide, N-(4-methoxyphenyl)thiophene-3-carboxamide, N-(4-methoxyphenyl)-5-nitrothiophene-3-amide and N-(4-methoxyphenyl)benzamide is identical with that of the molecular ion of 4-methoxyphenol. This ion becomes abundant in metastable energy window reactions. A probable mechanism for its formation is discussed.

STUDIES IN ORGANIC MASS-SPECTROMETRY.17. FORMATION OF PHENOL RADICAL IONS BY REARRANGEMENT OF THE MOLECULAR-IONS OF SOME N-ARYLTHIOPHENECARBOXAMIDES AND N-ARYLTHIOPHENEBENZAMIDES

FOTI, Salvatore;SALETTI, Rosaria;
1995-01-01

Abstract

It has been shown by exact mass measurements and collision-induced dissociation mass-analysed ion kinetic energy spectra that the structure of the m/z 124 ion observed in the mass spectra of N-(4-methoxyphenyl)thiophene-2-carboxamide, N-(4-methoxyphenyl)thiophene-3-carboxamide, N-(4-methoxyphenyl)-5-nitrothiophene-3-amide and N-(4-methoxyphenyl)benzamide is identical with that of the molecular ion of 4-methoxyphenol. This ion becomes abundant in metastable energy window reactions. A probable mechanism for its formation is discussed.
1995
PHARMACEUTICAL INTEREST; SPECTRA; THIOPHENE-2-CARBOXANILIDES; FRAGMENTATION; NMR
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11769/43932
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