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Paper | Regular issue | Vol 29, No. 1, 1989, pp.185-193
Published online, 1st January, 1970
DOI: 10.3987/COM-88-4766
Mass Spectometric Fragmentation of the Protonated Sydnones under Chemical Ionization

Ling-ling Tien, Shaw-Tao Lin,* and Hui-Jean Chiang

*Department of Applied Chemistry, Providence University, 200 Chungchi Road, Sha-Lu, Taichung Hsien, 433, Taiwan, R.O.C.


The chemical ionization spectra of twenty protonated sydnones were measured by using methane a s a reagent gas. The intense fragmentation reaction takes place from the rupture of the sydnone ring by losing of HNO and CO molecules except for 3-benzylsydnones. The benzylsydnones yield the benzylic (tropylium) cations as the base peak. The NH+4 protonated 3-phenylsydnone results in [M+1]+[M+H+NH3]+ and [M+H+2NH3]+ as the principal peaks without any significant fragmentations.