| Popis: |
The mass spectra of 1,3-dioxane and its 2,4,5- and 6-alkyl substituted derivatives are discussed. Two main degradation patterns result respectively from initial elimination of a 2-hydrogen atom or alkyl substituent and from the expulsion of a formaldehyde molecule. Subsequent fragmentations are highly influenced by the presence of substituents. 4,6-Disubstituted 1,3-dioxanes exhibit a distinct and typical fragmentation, starting with the expulsion of a substituent. Some of the mechanisms proposed are sustained by deuterium labeling. |
