Chapter 12, Problem 12.19P

Interpretation Introduction

(a)

Interpretation:

Whether the peak at $m/z=83$ in mass spectrum of $\text{1-heptanol}$ is odd-electron or even-electron fragment is to be stated.

Concept introduction:

In mass spectrometry, an electron is lost to form a molecular ion. Two types of fragmentation occur. A stable molecular ion decomposes slowly and a peak with large relative abundance is detected in the mass spectrometer. If the molecular ion is unstable, it decomposes into several ions.

Interpretation Introduction

(b)

Interpretation:

Whether the peak at $m/z=56$ in mass spectrum of $\text{1-heptanol}$ is odd-electron or even-electron fragment is to be stated.

Concept introduction:

In mass spectrometry, an electron is lost to form a molecular ion. Two types of fragmentation occur. A stable molecular ion decomposes slowly and a peak with large relative abundance is detected in the mass spectrometer. If the molecular ion is unstable, it decomposes into several ions.

Interpretation Introduction

(c)

Interpretation:

Whether the peak at $m/z=41$ in mass spectrum of $\text{1-heptanol}$ is odd-electron or even-electron fragment is to be stated.

Concept introduction:

In mass spectrometry, an electron is lost to form a molecular ion. Two types of fragmentation occur. A stable molecular ion decomposes slowly and a peak with large relative abundance is detected in the mass spectrometer. If the molecular ion is unstable, it decomposes into several ions.