title: Characterization of isomeric 1,2,4-oxadiazolyl-N-methylpyridinium salts by electrospray ionization tandem mass spectrometry.
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.
authors: Dipartimento di Chimica e Tecnologie Farmaceutiche, Università degli Studi di Palermo, Via Archirafi N.32, 90123 Palermo, Italy.
authors: Guiseppe
authors: G
authors: Avellone
authors: David
authors: D
authors: Bongiorno
authors: Silvestre
authors: S
authors: Buscemi
authors: Leopoldo
authors: L
authors: Ceraulo
authors: Serena
authors: S
authors: Indelicato
authors: Andrea
authors: A
authors: Pace
authors: Ivana
authors: I
authors: Pibiri
authors: Nicolò
authors: N
authors: Vivona
mesh_terms: D052578:Ionic Liquids / Q000737:chemistry*; D007536:Isomerism; D008956:Models, Chemical; D008958:Models, Molecular; D012492:Salts / Q000737:chemistry; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization / Q000379:methods*
chemical_list: D052578:Ionic Liquids; D012492:Salts