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Chapter 14: Q46P (page 665)

What does cross peak X in figure tell you?

Short Answer

Expert verified

Hydrogen having signal at in H1NMR spectrum has a bond with the carbon atom having signal at 19鈥�ppm in 13CNMR spectrum.

Step by step solution

01

Step-by-Step SolutionStep 1: Identifying the type of spectrum

The given spectrum is an example of the HETCOR spectrum.

HETCOR spectrum tells about the bonding between carbon and hydrogen atoms.

02

Explanation of cross peak

Cross peak in the HETCOR spectrum hints at how the carbon atom and hydrogen atom get bonded. Here, protons having signal at 1鈥�ppmin H1NMR spectrum make a bond with the carbon atom having signal at19鈥�ppm in role="math" localid="1652278604840" 13CNMR spectrum.

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Most popular questions from this chapter

Identify each of the following compounds from the 1H NMR data and molecular formula:

a.C4H8Br2: a 6H singlet at 1.97 ppm

a 2H singlet at 3.89 ppm

b. C8H9Br: a 3H doublet at 2.01 ppm

a 1H quartet at 5.14 ppm

a 5H broad singlet at 7.35 ppm

c. C5H10O2: a 3H triplet at 1.15 ppm

a 3H triplet at 1.25 ppm

a 2H quartet at 2.33 ppm

a 2H quartet at 4.13 ppm

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

a.C5H12O

b. C6H12O2

c. C4H7ClO2

d. C4H8O2

How an H1NMR distinguish between the compounds in each of the following pairs?

a.

b.

c.

d.

e.

f.

g.

h.

i.

j.

How can 1,2-, 1,3-, and 1,4-dinitrobenzene be distinguished by

  1. 1H NMR spectroscopy?
  2. 13C NMR spectroscopy?

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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