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Tell how you could distinguish between the pair of compounds by their infrared s

ID: 1010813 • Letter: T

Question

Tell how you could distinguish between the pair of compounds by their infrared spectra:


Compound A CH3CH2CH2N(CH3)2 and Compound B CH3CH2CH2NH2

Compound A will show an NH absorption while Compound B will not.

Compound B will show an NH absorption while Compound A will not.

The infrared spectra will be the same for both compounds.

There is no way to differentiate between the two compounds using IR.

a.

Compound A will show an NH absorption while Compound B will not.

b.

Compound B will show an NH absorption while Compound A will not.

c.

The infrared spectra will be the same for both compounds.

d.

There is no way to differentiate between the two compounds using IR.

Explanation / Answer

The option    b. is the correct answer.
Compound B will show an NH absorption while Compound A will not.
Compound B CH3CH2CH2NH2 contains N-H bonds. Hence, it will show an NH absorption.
Compound A CH3CH2CH2N(CH3)2 lacks N-H bond. Hence, it will not show an NH absorption.

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