Which of the following is not a major peak in the mass spectrum of isopentane?

Question

Quizplus · Accepted Answer

Isopentane (C5H12) has major peaks in its mass spectrum corresponding to common fragment ions, such as m/z = 29 (ethyl cation, C2H5+), 43 (propyl cation, C3H7+), and 57 (butyl cation, C4H9+). The peak at m/z = 72 corresponds to the molecular ion (M+) peak of isopentane itself. The peak at m/z = 60 does not correspond to a common fragmentation pattern of isopentane, making it the correct answer.

Which of the Following Is Not a Major Peak in the Mass