Chapter 11, Problem 11.34E

Interpretation Introduction

(a)

Interpretation:

The correct IUPAC name of the given alkane is to be stated.

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 IUPAC name from structural formula are:

1. First identify the longest carbon chain.

2. The next step is to identify the functional groups attached to the longest chain.

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

4. Use prefix di, tri, tetra if same type of substituent is present.

Answer to Problem 11.34E

The correct IUPAC name of the given alkane is $3$-methylpentane.

Explanation of Solution

The given compound is,

Figure 1

The longest continuous chain of carbon atoms is of five atoms, thus, the parent compound is pentane. The methyl group is attached to third carbon atom. The name of the given compound is $3$-methylpentane.

Conclusion

The name of the given compound is $3$-methylpentane.

Interpretation Introduction

(b)

Interpretation:

The correct IUPAC name of the given alkane is to be stated.

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 IUPAC name from structural formula are:

1. First identify the longest carbon chain.

2. The next step is to identify the functional groups attached to the longest chain.

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

4. Use prefix di, tri, tetra if same type of substituent is present.

Answer to Problem 11.34E

The name of the given compound is $2,4,5$-trimethylheptane.

Explanation of Solution

The given compound is,

Figure 2

The longest continuous chain of carbon atoms is of seven atoms, thus, the parent compound is heptane. Three methyl groups are attached to second, fourth and fifth carbon atoms. The prefix ‘tri’ is used before methyl in the name of the given compound. The name of the given compound is $2,4,5$-trimethylheptane.

Conclusion

The name of the given compound is $2,4,5$-trimethylheptane.

Interpretation Introduction

(c)

Interpretation:

The correct IUPAC name of the given alkane is to be stated.

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 IUPAC name from structural formula are:

1. First identify the longest carbon chain.

2. The next step is to identify the functional groups attached to the longest chain.

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

4. Use prefix di, tri, tetra if same type of substituent is present.

Answer to Problem 11.34E

The name of the given compound is $3$-ethyl-$2,3$-dimethylpentane.

Explanation of Solution

The given compound is,

Figure 3

The longest continuous chain of carbon atoms is of five atoms, thus, the parent compound is pentane. The two methyl groups are attached to second and third carbon atoms. The prefix ‘di’ is used before methyl in the name of the given compound. An ethyl group is attached to third carbon atom. The name of the given compound is $3$-ethyl-$2,3$-dimethylpentane.

Conclusion

The name of the given compound is $3$-ethyl-$2,3$-dimethylpentane.

Interpretation Introduction

(d)

Interpretation:

The correct IUPAC name of the given alkane is to be stated.

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 IUPAC name from structural formula are:

1. First identify the longest carbon chain.

2. The next step is to identify the functional groups attached to the longest chain.

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

4. Use prefix di, tri, tetra if same type of substituent is present.

Answer to Problem 11.34E

The name of the given compound is $4,7$-diethyl-$5$-methyldecane.

Explanation of Solution

The given compound is,

Figure 4

The longest continuous chain of carbon atoms is ten atoms, thus, the parent compound is decane. One methyl group is attached to fifth carbon atom. Two ethyl groups are attached to fourth and seventh carbon atoms. The prefix ‘di’ is used before ethyl in the name of the given compound. The name of the given compound is $4,7$-diethyl-$5$-methyldecane.

Conclusion

The name of the given compound is $4,7$-diethyl-$5$-methyldecane.

Interpretation Introduction

(e)

Interpretation:

The correct IUPAC name of the given alkane is to be stated.

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 IUPAC name from structural formula are:

1. First identify the longest carbon chain.

2. The next step is to identify the functional groups attached to the longest chain.

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

4. Use prefix di, tri, tetra if same type of substituent is present.

Answer to Problem 11.34E

The name of the given compound is $3$-ethyl-$5$-methylnonane.

Explanation of Solution

The given compound is,

Figure 5

The longest continuous chain of carbon atoms is of nine atoms, thus, the parent compound is nonane. One methyl group is attached to fifth carbon atom. One ethyl group is attached to third carbon atom. The name of the given compound is $3$-ethyl-$5$-methylnonane.

Conclusion

The name of the given compound is $3$-ethyl-$5$-methylnonane.