Fragmentation, mass spectrometry

Amines have odd numbered molecular weights which helps identify them by mass spectrometry Fragmentation tends to be controlled by the formation of a nitrogen stabilized cation... 

Table 5. Mass spectrometry fragmentation pattern of (z>)-penicillamine...

Formation of dihydrotropylium ions is a key feature of the C H9+ hypersurface. Currently, efforts in our laboratory276 have concentrated on the presence of different C H9+ isomers by probing their bimolecular reactivity. Thus, gas-phase titration in the FT-ICR mass spectrometer has revealed that mixtures of C7H9+ ions are formed by protonation of 1,3,5-cycloheptatriene, 6-methylfulvene and norbomadiene as the neutral precursors but that, in contrast to the results obtained by CS mass spectrometry, fragmentation of the radical cations of limonene yields almost exclusively toluenium ions275. 

Scheme V. Mass spectrometrie fragmentation of muoronine-A aldehydes...

Our discussion of interpreting mass spectra is limited to El mass spectrometry. Fragmentation in El mass spectra is rich with structural information mastery of El mass spectra is especially useful for the organic chemist. 

Li, J., Dzieciatkowska, M., Hood, D.W., Cox, A.D., Schweda, E.K., Moxon, E.R., Richards, J.C. Structural characterization of sialylated glycoforms of H. influenzae by electrospray mass spectrometry fragmentation of protonated and sodiated O-deacylated lipopolysaccharides. Rapid Commun Mass Spectrom 21 (2007) 952-960. 

Recently Caire-Maurisier and Tranchani [160] examined thermal decomposition of nitroglycerine at 110°C using NMR, infra red and mass spectrometry and gas chromatography techniques. Mass spectrometry fragmentation suggested the formation of such fragments as NO", NO, CO, Co, CHjO . 

Mass spectrometry fragmentation was investigated by a number of authors [60] (also references in [47]). More recent work was done by Volk and Schu-... 

Buhr, K., van Ruth, S., Delahunty, C. (2002) Analysis of volatile flavour compounds by proton transfer reaction-mass spectrometry fragmentation patterns and discrimination between isobaric and isomeric compounds. International Journal of Mass Spectrometry, 221,1-7. 

See also Chemical Ionization in Mass Spectrometry Fast Atom Bombardment Ionization in Mass Spectrometry Fragmentation in Mass Spectrometry Ion Structures in Mass Spectrometry Ion Trap Mass Spectrometers Ionization Theory Ion Energetics in Mass Spectrometry Ion Collision Theory Metastable Ions Quadrupoles, Use of in Mass Spectrometry Sector Mass Spectrometers Statistical Theory of Mass Spectra Time of Flight Mass Spectrometers. 

See also Chemical Ionization in Mass Spectrometry Fragmentation in Mass Spectrometry. 

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