Question: (a) Show how fragmentation occurs to give the base peak at m/z 58 in the mass spectrum of ethyl propyl amine (N-ethylpropan-1- amine), shown below.

(a) Show how fragmentation occurs to give the base peak at m/z 58 in the mass spectrum of ethyl propyl amine (N-ethylpropan-1- amine), shown below.
(b) Show how a similar cleavage in the ethyl group gives an ion of m/z 72.
(c) Explain why the peak at m/z 72 is much weaker than the one at m/z 58.

100 58 80 60 40 20 14 0 10 20 30 40 50 070 80 90 100 110 120 130 40 150 160 m/z

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