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Chapter 14: Q.21558-14-7P. (page 535)

How many NMR signals would you expect for each compound?

a.

b.

c.

Short Answer

Expert verified

a. 4

b. 5

c. 5

Step by step solution

01

NMR spectroscopy

The chemical shift of a proton is affected by the presence of an electronegative atom. The proton around the electronegative atom is deshielded, due to which it absorbs downfield.

02

 1H NMR signals in a, b and c

a.

The given compound has four types of protons, and it will give four signals, as shown below.

Structure of a

b.

The given compound has five types of protons, and it will give five signals, as shown below.

Structure of b

c.

The given compound has five types of protons, and it will give five signals, as shown below.

Structure of c

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Most popular questions from this chapter

Question: (a) How many 1H NMR signals does each compound show? (b) Into how many peaks is each signal split?

For each compound, first label each different type of proton and then rank the protons in order of increasing chemical shift.

a.

b.

c.

Question: How many \(^{\bf{1}}{\bf{H}}\) NMR signals would you expect for each compound?

a.

b.

c.

Question: Label the signals due to Ha ,Hb and Hc in the 1 H NMR spectrum of acrylonitrile (CH2=CHCN ). Draw a splitting diagram for the absorption due to the proton Hc.

Rank the highlighted carbon atoms in each compound in order of increasing chemical shift.

a.

b.
See all solutions

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