(b) The electron impact ionization spectrum of 3-octanone is given below: Account for the major peaks (as indicated) in the spectrum and the fragmentation mechanisms which lead to the formation of the respective ions. The peak at m/z 71 arises from a rearrangement: Explain how this occurs.
100
43
57
80
72
3-Octanone
29
160 L 40
99
71
20
128
25
50
75 m/z
100
125