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Chapter 14: Q14-68P (page 677)

Draw a splitting diagram for the Hb proton if Jbc=10 and Jba=5.

Short Answer

Expert verified

In a splitting diagram, the NMR peaks are depicted as vertical lines, and the effect of each of the splittings is represented one at a time.

Step by step solution

01

Proton spectrum reading

In a splitting diagram, the NMR peaks are depicted as vertical lines, and the effect of each of the splittings is represented one at a time.

02

Split diagram for a given compound

  • In the splitting diagram, five signals will be seen.
  • The splitting diagram for b protons in the given compound is first to split into a doublet by c proton. Then these doublets are further split into triplets with the overlapping of one peak from both triplets. The intensities of overlapping peaks will be added on.

Concluded splitting diagram for compound

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Most popular questions from this chapter

Propose a mechanism for proton exchange of an alcohol in aqueous base.

The 1 H NMR spectra of two carboxylic acids with molecular formula C3H5O2Cl are shown below. Identify the carboxylic acids. (The 鈥渙ffset鈥� notation means that the farthest-left signal has been moved to the right by the indicated amount to fit on the spectrum; thus, the signal at 9.8 ppm offset by 2.4 ppm has an actual chemical shift of 9.8 + 2.4 = 12.2 ppm.)

What does cross peak X in figure tell you?

A signal is seen at 600 Hz from the TMS signal in an NMR spectrometer with a 300-MHz operating frequency.

a. What is the chemical shift of the signal?

b. What is its chemical shift in an instrument operating at 500 MHz?

c. How many hertz from the TMS signal is the signal in a 500-MHz spectrometer?

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.
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