Notiz über thermische Ummethylierungsreaktionen. 5. Mitteilung über das massenspektrometrische Verhalten quartärer Stickstoffverbindungen
✍ Scribed by M. Hesse
- Publisher
- John Wiley and Sons
- Year
- 1967
- Tongue
- German
- Weight
- 213 KB
- Volume
- 50
- Category
- Article
- ISSN
- 0018-019X
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The base peak in the spectrum of lysine methyl ester is due to the fragment ion C ~H ~O N (m/e 84), for which the cyclic structure g (Scheme I ) is deduced. During its formation from the [M-COOCHsI-ion an equilibration of both nitrogen atoms takes place (ion c, Scheme I). The cyclic nature of ion m/
**Loss of ammonia from α,ω‐alkanediamines in the mass spectrometer**. Under electron impact α,ω‐alkanediamines lose ammonia from the molecular ion. This fragmentation reaction is explained in the case of 1.4‐butanediamine (**1**) on the basis of the spectra of homologues and deuteriated derivatives