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Author Rest, G. ♦ Jensen, L. B. ♦ Azeim, S. Abdel ♦ Mourgues, P. ♦ Audier, H. E.
Source SpringerLink
Content type Text
Publisher Springer-Verlag
File Format PDF
Copyright Year ©2004
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Chemistry & allied sciences
Subject Keyword Analytical Chemistry ♦ Biotechnology ♦ Organic Chemistry ♦ Proteomics ♦ Bioinformatics
Abstract The reactions of the water solvated ammonia radical cation [NH 3 ·+ , H$_{2}$O] with a variety of aldehydes and ketones were investigated. The reactions observed differ from those of low energy aldehydes and ketones radical cations, although electron transfer from the keto compound to ionized ammonia is thermodynamically allowed within the terbody complexes initially formed. The main process yields an ammonia solvated enol with loss of water and an alkene. This process corresponds formally to a McLafferty fragmentation within a complex. With aldehydes, another reaction can take place, namely the transfer of the hydrogen from the CHO group to ammonia, leading to the proton bound dimer of ammonia and water, and to the NH 4 + cation. Comparison between the available experimental results leads to the conclusion that the McLafferty fragmentation occurs within the terbody complex initially formed, with no prior ligand exchange, the water molecule acting as a spectator partner.
ISSN 10440305
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2004-07-01
Publisher Institution The American Society for Mass Spectrometry
Publisher Place New York
e-ISSN 18791123
Journal Journal of The American Society for Mass Spectrometry
Volume Number 15
Issue Number 7
Page Count 6
Starting Page 966
Ending Page 971


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Source: SpringerLink