ELECTRON IMPACT STUDIES .49. C13H9 SKELETAL-REARRANGEMENT FRAGMENT IN MASS SPECTRA OF BENZYL PHENYL KETONE DERIVATIVES

The spectra of benzyl phenyl ketone derivatives contain ions at m/e 165 (C13H9) which are produced by skeletal-rearrangement processes. The rearrangement peak is most pronounced in the spectrum of the oxime of benzyl phenyl ketone where it arises mainly from an M-H2O species. Deuterium labelling studies and metastable characteristics are consistent with the M - 18 species having the properties of a 2.3-diphenyl-2-H-azirine molecular ion. © 1969.