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Chapter 14: Q45P (page 664)

Identify pairs of coupled protons in the compound whose COSY spectrum is shown below:

Short Answer

Expert verified

Protons in ‘a’ is split by ‘c’; and those in ‘b’ is split by ‘d’.

Step by step solution

01

Step-by-Step SolutionStep 1: Draw a triangle showing the signals

The triangle is drawn in the spectrum which helps in easy identification of coupled protons. There is a cross peak in the triangle which tells about the coupled protons.

02

Finding coupled protons from the triangle

There are two points in the triangle, A and B.Point A denotes that protons in ‘a’ are split by protons in ‘c’. Point B denotes that the protons in ‘b’ are split by protons in ‘d’.

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Most popular questions from this chapter

Propose structures that are consistent with the following spectra. (Integral ratios are given from left to right across the spectrum.)

a. The1HNMR spectrum of a compound with molecular formulaC4H10O2has two singlets with integral ratios of 2: 3.

b. The1HNMR spectrum of a compound with molecular formulaC6H10O2has two singlets with integral ratios of 2: 3.

c. The1HNMR spectrum of a compound with molecular formulaC8H6O2has two singlets with integral ratios of 1: 2.

Identify each of the following compounds from its molecular formula and its H1NMR spectrum:

a.C8H8

b.C6H12O

c.C9H18O

d.C4H8O

Question:Identify each of the following compounds from its mass spectrum, IR spectrum, 1H and NMR spectrum:

a.

b.

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.

Identify each compound from its molecular formula and itsNMR spectrum:

a) C9H12

b) C5H10O

c)C9H10O2
See all solutions

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