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

Electron impact studies of 4a-Methyl-4,4a-dihydrophenanthren-2(3H)-one and related phenanthrones

E Njau

Australian Journal of Chemistry 29(12) 2731 - 2735
Published: 1976


The mass spectra of 4a-methyl-4,4a-dihydrophenanthren-2(3H)-one and closely related phenanthrenones have been studied. The suggested fragmentation processes, substantiated by high-resolution mass measurements and appropriate metastable peaks, are shown to be characteristic of compounds with the same hydro-oxo-phenanthrene chromophore. 2-Cinnamylidene-6-methyl-cyclohexanone possessing a similar chromophore is also shown to exhibit a comparable fragmentation pattern.

© CSIRO 1976

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