| Abstract: | The CA spectra of the M – Alkene]+·- and M – Alkyl]+- ions from several 2-alkoxy-benzoic acid methyl esters and two 2H labelled 2-ethoxybenzoic acid methyl esters are discussed. The results show that the M – alkene]+· ions decomposing after 10?5 s by collisional activation have the structure of the ionised salicylic acid methyl ester. Moreover, it is demonstrated that the M – methyl]+ ions from the 2-ethoxy esters exist in two different structures. No equilibration between these two structures is observed even after 10?5s. Structures for several daughter ions generated by collisional activation are discussed using the CA spectra of the labelled compounds. |
