The molecule above is sent through a mass spectrometer. Which of the following is the chemical species represented by a peak at m/z 43?
A) methyl carbocation
B) ethyl carbocation
C) propyl carbocation
D) butyl carbocation
Each of the carbocations listed would have a charge of +1. Thus the species with a m/z of 43 would simply be the one with the mass closest to 43. Here, that’s choice (C).
A: A methyl group has a mass of approximately 15
B: An ethyl group has a mass of approximately 29
D: A butyl group has a mass of approximately 56