Chapter 13, Problem 13.6E

Interpretation Introduction

(a)

Interpretation:

An IUPAC name for the alcohol, ${\text{CH}}_{\text{3}}\text{OH}$ is to be predicted.

Concept introduction:

The systematic naming of organic compound is given by IUPAC nomenclature. The naming of organic compound is done such that the structure of organic compound is correctly interpreted from the name.

Rules for writing structural formula from IUPAC are:

1. First identify the word root for the given compound.

2. The suffix used in the compound like –ene, -ol, -al, -oic and so on.

3. Identify the position, location, and number of the substituent bonded to the carbon chain.

Answer to Problem 13.6E

The IUPAC name for the alcohol, ${\text{CH}}_{\text{3}}\text{OH}$ is methanol.

Explanation of Solution

In ${\text{CH}}_{\text{3}}\text{OH}$, the longest carbon chain contains only one carbon atom. The alcohol will be methanol and no location number is required for the $-\text{OH}$ group because the hydroxyl group is attached to the single carbon atom. Therefore, IUPAC name for the alcohol, ${\text{CH}}_{\text{3}}\text{OH}$ is methanol.

Conclusion

The IUPAC name for the alcohol, ${\text{CH}}_{\text{3}}\text{OH}$ is methanol.

Interpretation Introduction

(b)

Interpretation:

An IUPAC name for the given alcohol is to be predicted.

Concept introduction:

The systematic naming of organic compound is given by IUPAC nomenclature. The naming of organic compound is done such that the structure of organic compound is correctly interpreted from the name.

Rules for writing structural formula from IUPAC are:

1. First identify the word root for the given compound.

2. The suffix used in the compound like –ene, -ol, -al, -oic and so on.

3. Identify the position, location, and number of the substituent bonded to the carbon chain.

Answer to Problem 13.6E

An IUPAC name for the given alcohol is propan-$2$-ol.

Explanation of Solution

The alcohol for which the IUPAC name has to be predicted is shown below.

Figure 1

The longest carbon chain in this alcohol is made up of three carbon atoms. The three carbon atoms chain makes this alcohol a propanol. The hydroxyl group is attached to the second carbon atom. Therefore, the IUPAC name for this alcohol is propan-$2$-ol.

Conclusion

An IUPAC name for the given alcohol is propan-$2$-ol.

Interpretation Introduction

(c)

Interpretation:

An IUPAC name for the alcohol, ${\text{CH}}_{\text{3}}{\text{CH}}_2\text{OH}$ is to be predicted.

Concept introduction:

The systematic naming of organic compound is given by IUPAC nomenclature. The naming of organic compound is done such that the structure of organic compound is correctly interpreted from the name.

Rules for writing structural formula from IUPAC are:

1. First identify the word root for the given compound.

2. The suffix used in the compound like –ene, -ol, -al, -oic and so on.

3. Identify the position, location, and number of the substituent bonded to the carbon chain.

Answer to Problem 13.6E

An IUPAC name for the alcohol, ${\text{CH}}_{\text{3}}{\text{CH}}_2\text{OH}$ is ethanol.

Explanation of Solution

In ${\text{CH}}_{\text{3}}{\text{CH}}_2\text{OH}$, the longest carbon chain is made up of two carbon atoms. The two carbon atoms chain makes this alcohol an ethanol. No location number is required for the $-\text{OH}$ group because the hydroxyl group is attached to the first carbon atom. Therefore, the IUPAC name for the alcohol, ${\text{CH}}_{\text{3}}{\text{CH}}_2\text{OH}$ is ethanol.

Conclusion

An IUPAC name for the alcohol, ${\text{CH}}_{\text{3}}{\text{CH}}_2\text{OH}$ is ethanol.

Interpretation Introduction

(d)

Interpretation:

An IUPAC name for the given alcohol is to be predicted.

Concept introduction:

The systematic naming of organic compound is given by IUPAC nomenclature. The naming of organic compound is done such that the structure of organic compound is correctly interpreted from the name.

Rules for writing structural formula from IUPAC are:

1. First identify the word root for the given compound.

2. The suffix used in the compound like –ene, -ol, -al, -oic and so on.

3. Identify the position, location, and number of the substituent bonded to the carbon chain.

Answer to Problem 13.6E

An IUPAC name for the given alcohol is $1,2$-ethanediol.

Explanation of Solution

The alcohol for which the IUPAC name has to be predicted is shown below.

Figure 2

The longest carbon chain in this alcohol is made up of two carbon atoms. The hydroxyl groups are attached to the first and second carbon atom. Therefore, the IUPAC name for the given alcohol is $1,2$-ethanediol.

Conclusion

An IUPAC name for the given alcohol is $1,2$-ethanediol.

Interpretation Introduction

(e)

Interpretation:

An IUPAC name for the given alcohol is to be predicted.

Concept introduction:

The systematic naming of organic compound is given by IUPAC nomenclature. The naming of organic compound is done such that the structure of organic compound is correctly interpreted from the name.

Rules for writing structural formula from IUPAC are:

1. First identify the word root for the given compound.

2. The suffix used in the compound like –ene, -ol, -al, -oic and so on.

3. Identify the position, location, and number of the substituent bonded to the carbon chain.

Answer to Problem 13.6E

An IUPAC name for the given alcohol is propane-$1,2,3$-triol.

Explanation of Solution

The alcohol for which the IUPAC name has to be predicted is shown below.

Figure 3

The longest carbon chain in this alcohol is made up of three carbon atoms. One hydroxyl group is attached to each carbon atom. Therefore, the alcohol will be propanetriol. The hydroxyl group is attached to the first, second and third carbon atom. Therefore, the IUPAC name for the given alcohol is propane-$1,2,3$-triol.

Conclusion

An IUPAC name for the given alcohol is propane-$1,2,3$-triol.