Which of the following is expected to be the base peak in the mass spectrum of pentanal?

Question

Quizplus · Accepted Answer

The base peak in a mass spectrum is the most intense peak, and it represents the fragment ion that is formed most readily during the ionization process. In the case of pentanal, the molecular ion peak (M) would be expected at m/z = 86. The base peak would then correspond to the most common fragment ion that is formed from the molecular ion. One possible fragmentation pathway for pentanal could involve loss of a methyl radical (CH3), which would result in a fragment ion at m/z = 44. Therefore, choice C (44) is the best answer option.

Which of the Following Is Expected to Be the Base