Chapter 21, Problem 21.24P

Interpretation Introduction

Interpretation:

Molecular formula for peaks observed at $\text{m/z}$ values of 31, 41, 43 and 56 in $1\text{-butanol}$ have to be suggested.

Concept Introduction:

Peak that is most abundant has maximum intensity and appears usually at the end. This is identified as molecular ion peak. Other fragments can be obtained by loss of small alkyl groups, or water molecules, or by rearrangement. Fragmentation yield to most stable carbocation or more stable radical possible. Such data is useful to predict identity of sample.

For instance, loss of ethylene molecule from methylcyclopentane yields secondary carbocation as illustrated below: