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Chapter 14: Q48P (page 669)

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

a.Jba=Jbc b.Jba=2Jbc

Short Answer

Expert verified

a.

This has five peaks, called quintet.

b.

This has eight peaks i.e., double of quartet.

Step by step solution

01

Step-by-Step SolutionStep 1: Splitting diagram for Hbproton

a.

This shows five peaks i.e., a quintet.

b.

This shows eight peaks i.e., double of quartet.

02

Multiplicity

a. Here,Hbproton is split into four peaks initially by theHa protons and further to five peaks, i.e. a quintet.

b. Here,Hbproton is split into doublet of quartet, i.e. eight peaks by the Hcprotons.

SoJba=Jbc andJba=2Jbc.

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Most popular questions from this chapter

Predict the splitting patterns for the signals given by compounds in Problem 4.

a. If two signals differ by 1.5 ppm in a 300 MHz spectrometer, by how much do they differ in a 500 MHz spectrometer?

b. If two signals differ by 90 Hz in a 300 MHz spectrometer, by how much do they differ in a 500 MHz spectrometer?

Dr. N. M. Arr was called in to help analyze the 1 H NMR spectrum of a mixture of compounds known to contain only C, H, and Br. The mixture showed two singlets-one at 1.8 ppm and the other at 2.7 ppm-with relative integrals of 1: 6, respectively. Dr. Arr determined that the spectrum was that of a mixture of bromomethane and 2-Bromo-2-methylpropane. What was the ratio of bromomethane to 2-Bromo-2-methylpropane in the mixture?

An alkyl halide reacts with an alkoxide ion to form a compound whose 1H NMR spectrum is shown here. Identify the alkyl halide and the alkoxide ion.

Draw a diagram like the one shown in Figure 14.12 to predict;

a. the relative intensities of the peaks in a triplet.

b. the relative intensities of the peaks in a quintet.
See all solutions

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