A. Karpati, A. Mandelbaum
Nov 1, 1971
Citations
0
Influential Citations
9
Citations
Journal
Journal of Mass Spectrometry
Abstract
Elimination of CO gives rise to prominent peaks in the mass spectra of cis-1,2,3,6-tetrahydrophthalic anhydride (Ia) and its 4,5-dimethyl analogue which are almost absent in the corresponding trans-isomers. The striking difference in the fragmentation of the isomers shows that practically no rearrangement in the molecular ion occurs prior to this fragmentation. In this case a high degree of stereospecificity is observed, although hydrogen migration is apparently not involved in the process.