Australian Journal of Chemistry Australian Journal of Chemistry Society
An international journal for chemical science

Mass spectra of α-diketones. I. Non-enolized α-diketones

JH Bowie, RG Cooks, GE Gream and MH Laffer

Australian Journal of Chemistry 21(5) 1247 - 1256
Published: 1968


The mass spectra of a series of a-diketones are reported and discussed. Fragmentation patterns have been substantiated by exact mass measurements, metastable ions, and in two cases, by deuterium labelling studies. The McLafferty rearrangement is not observed in the spectra of aliphatic α-diketones; fragmentation proceeds by α-cleavage. The fragmentation modes of those cyclic α-diketones studied depend largely on the ring size. Molecular ions are observed in all spectra.

© CSIRO 1968

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