Chapter 19.14, Problem 24P

Interpretation Introduction

a)

Interpretation:

Where the absorptions due to 4-penten-2-one can be observed in the IR spectrum is to be stated.

Concept introduction:

Aldehydes and ketones show a strong absorption band in IR from 1660-1770 cm^-1. Aldehydes show two characteristic C-H absorptions between 2700-2760cm^-1 and 2800-2860 cm^-1. Saturated aldehydes absorb near 1730 cm^-1 while aromatic aldehydes and α, β- unsaturated aldehydes absorb near 1705 cm^-1. Saturated ketones and cyclohexanones absorb near 1715 cm^-1 while aromatic ketones and α, β- unsaturated ketones absorb near 1685-1690 cm^-1.

To show:

Where the absorptions due to 4-penten-2-one can be observed in the IR spectrum.

Interpretation Introduction

b)

Interpretation:

Where the absorptions due to 3-penten-2-one can be observed in the IR spectrum is to be stated.

Concept introduction:

Aldehydes and ketones show a strong absorption band in IR from 1660-1770 cm^-1. Aldehydes show two characteristic C-H absorptions between 2700-2760cm^-1 and 2800-2860 cm^-1. Saturated aldehydes absorb near 1730 cm^-1 while aromatic aldehydes and α, β- unsaturated aldehydes absorb near 1705 cm^-1. Saturated ketones and cyclohexanones absorb near 1715 cm^-1 while aromatic ketones and α, β- unsaturated ketones absorb near 1685-1690 cm^-1.

To show:

Where the absorptions due to 3-penten-2-one can be observed in the IR spectrum.

Interpretation Introduction

c)

Interpretation:

Where the absorptions due to 2,2- dimethylcyclopentanone can be observed in the IR spectrum is to be stated.

Concept introduction:

Aldehydes and ketones show a strong absorption band in IR from 1660-1770 cm^-1. Aldehydes show two characteristic C-H absorptions between 2700-2760cm^-1 and 2800-2860 cm^-1. Saturated aldehydes absorb near 1730 cm^-1 while aromatic aldehydes and α, β- unsaturated aldehydes absorb near 1705 cm^-1. Saturated ketones and cyclohexanones absorb near 1715 cm^-1 while aromatic ketones and α, β- unsaturated ketones absorb near 1685-1690 cm^-1. Cyclopentanones absorb around 1750 cm^-1.

To show:

Where the absorptions due to 2,2-dimethylcyclopentanone can be observed in the IR spectrum.

Interpretation Introduction

d)

Interpretation:

Where the absorptions due to m-chlorobenzaldehyde can be observed in the IR spectrum is to be stated.

Concept introduction:

Aldehydes and ketones show a strong absorption band in IR from 1660-1770 cm^-1. Aldehydes show two characteristic C-H absorptions between 2700-2760cm^-1 and 2800-2860 cm^-1. Saturated aldehydes absorb near 1730 cm^-1 while aromatic aldehydes and α, β- unsaturated aldehydes absorb near 1705 cm^-1. Saturated ketones and cyclohexanones absorb near 1715 cm^-1 while aromatic ketones and α, β- unsaturated ketones absorb near 1685-1690 cm^-1.

To show:

Where the absorptions due to m-chlorobenzaldehyde can be observed in the IR spectrum.

Interpretation Introduction

e)

Interpretation:

Where the absorptions due to 3-cyclohexenone can be observed in the IR spectrum is to be stated.

Concept introduction:

Aldehydes and ketones show a strong absorption band in IR from i660-1770 cm^-1. Aldehydes show two characteristic C-H absorptions between 2700-2760cm^-1 and 2800-2860 cm^-1. Saturated aldehydes absorb near 1730 cm^-1 while aromatic aldehydes and α, β- unsaturated aldehydes absorb near 1705 cm^-1. Saturated ketones and cyclohexanones absorb near 1715 cm^-1 while aromatic ketones and α, β- unsaturated ketones absorb near 1685-1690 cm^-1.

To show:

Where the absorptions due to cyclohex-3-ene-1-one can be observed in the IR spectrum.

Interpretation Introduction

f)

Interpretation:

Where the absorptions due to 2-hexenal can be observed in the IR spectrum is to be stated.

Concept introduction:

Aldehydes and ketones show a strong absorption band in IR from 1660-1770 cm^-1. Aldehydes show two characteristic C-H absorptions between 2700-2760cm^-1 and 2800-2860 cm^-1. Saturated aldehydes absorb near 1730 cm^-1 while aromatic aldehydes and α, β- unsaturated aldehydes absorb near 1705 cm^-1. Saturated ketones and cyclohexanones absorb near 1715 cm^-1 while aromatic ketones and α, β- unsaturated ketones absorb near 1685-1690 cm^-1.

To show:

Where the absorptions due to 2-hexenal can be observed in the IR spectrum.