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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

How many signals would you expect to see in the NMR spectrum of each of the following compounds ?

Explain why the chemical shift of the OH proton of a carboxylic acid is at a higher frequency than the chemical shift of an OH proton of an alcohol.

The 1H NMR spectrum of 2-propane-1-ol is shown here. Indicate the protons in the molecule that are responsible for each of the signals in the spectrum.

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

a.

b.

c.

d.

e.

f.

g.

h.

i.

j.
See all solutions

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