2-Methylpentane (C6H14) has the mass spectrum shown. Which peak repre- sents M†? Which is the base peak? Propose structures for fragment ions of m/z = 71, 57, 43, and 29. Why does the base peak have the mass it does? %3D 100 80 40 20 10 20 40 60 80 100 120 140 m/z Relative abundance (%)

2-Methylpentane (C6H14) has the mass spectrum shown. Which peak repre- sents M†? Which is the base peak? Propose structures for fragment ions of m/z = 71, 57, 43, and 29. Why does the base peak have the mass it does? %3D 100 80 40 20 10 20 40 60 80 100 120 140 m/z Relative abundance (%)

Organic Chemistry

8th Edition

ISBN:9781305580350

Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Chapter14: Mass Spectrometry

Section: Chapter Questions

Problem 14.37P

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Concept explainers

NMR Spectroscopy

NMR stands for Nuclear Magnetic Resonance in which the study of different molecules is done based on the interaction of radiofrequency electromagnetic radiations with the nuclei of molecules placed in a strong magnetic field. A precise study of spectra of visible light and all bands of electromagnetic radiation is called spectroscopy.

Question

2-Methylpentane (C6H14) has the mass spectrum shown. Which peak repre-
sents M+? Which is the base peak? Propose structures for fragment ions of
m/z = 71, 57, 43, and 29. Why does the base peak have the mass it does?
100
80
60
40
20
20
40
60
80
100
120
140
m/z
Relative abundance (%)
10

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