Characterization of isomeric 1,2,4-oxadiazolyl-N-methylpyridinium salts by electrospray ionization tandem mass spectrometry |
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Authors: | Avellone Guiseppe Bongiorno David Buscemi Silvestre Ceraulo Leopoldo Indelicato Serena Pace Andrea Pibiri Ivana Vivona Nicolò |
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Affiliation: | Dipartimento di Chimica e Tecnologie Farmaceutiche, Università degli Studi di Palermo, via Archirafi n.32 90123 Palermo, Italy. |
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Abstract: | The mass spectrometry behavior of 1,2,4-oxadiazolyl-N-methylpyridinium salts has been investigated. These substances are of current interest as perspective ionic liquids, compounds used as green solvents for synthesis, and for their catalytic properties. The studies have been developed through ESI-MS/MS experiments. The obtained results demonstrate that a readily distinction between the two isomeric classes, 3- N-methylpyridinium- and 5-N-methylpyridinium-1,2,4-oxadiazoles, is possible through ESI-MS/MS experiments. A deeper investigation on the principal fragmentation pathways of characteristic ions has been also developed. |
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