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Chapter 14: Q25P (page 642)

How can theirH1NMR spectra distinguish the following compounds?


Short Answer

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A)

B)

C)

Step by step solution

01

Step-by-Step SolutionStep 1: Signals in NMR Spectroscopy

The NMR signals indicate the different types of protons in a molecule.If the NMR spectra show six different peaks then it indicates that there are six different types of protons present.

02

Step 2:  H1NMR spectra for the molecules

In compound A , 1-Bromo nitrobenzene the compound shows four different signals. Two doublets and two doublets of doublets as shown below;

Compound 鈥楢鈥�

In compound B , 3-Bromo nitrobenzene the compound shows four different signals. Two doublets, one singlet, and one doublet of doublets as shown below;

Compound 鈥楤鈥�

In compound C , 4-Bromo nitrobenzene the compound shows two different signals. Two doublets as shown below;

Compound 鈥楥鈥�

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Most popular questions from this chapter

Determine the ratios of the chemically non-equivalent protons in a compound if the steps of the integration curves measure 40.5,鈥�27,鈥�13 and118鈥�mm , from left to right across the spectrum. Draw the structure of a compound whose H1NMR spectrum would show these integrals in the observed order.

Identify each of the following compounds from its molecular formula and its 13C NMR spectrum:

a.C4H10O

b.C6H12O

Why is there no coupling between the a and c protons or between the b and c protons in the cis and trans alkenes shown in Figure 14.20?

Draw a splitting diagram for the Hbproton and give its multiplicity if

a.Jba=Jbc b.Jba=2Jbc

Identify each of the following compounds from its molecular formula and its IR and 1H NMR spectra:

a. C6H120

b.C6H14O

c. C10H13NO3

d. C11H14O2
See all solutions

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