Chapter 19, Problem 18E

Interpretation Introduction

(a)

Interpretation:

The condensed structural formula of $2-\text{methylpropane}$ is to be stated.

Concept introduction:

The condensed structural formula is a way of representation or writing organic structures in a line. The lines are drawn between bonded atoms, but the bond between carbon-hydrogen should be omitted.

Answer to Problem 18E

The condensed structural formula of $2-\text{methylpropane}$ is shown below.

Explanation of Solution

The $\text{IUPAC}$ name of the given compound is $2-\text{methylpropane}$. Propane means that three carbon atoms are present in the structure and the suffix “ane” represents that the compound is alkane.

Figure 1

The numbering is assigned to the carbon atoms according to the longest continuous chain of carbon atoms. The $\text{2}-\text{methyl}$ represents that one methyl group is substituted at the carbon $-2$ as shown in Figure 1.

Conclusion

The condensed structural formula of $2-\text{methylpropane}$ is shown in Figure 1.

Interpretation Introduction

(b)

Interpretation:

The condensed structural formula of $2,2-\text{dimethylbutane}$ is to be stated.

Concept introduction:

The condensed structural formula is a way of representation or writing organic structures in a line. The lines are drawn between bonded atoms, but the bond between carbon-hydrogen should be omitted.

Answer to Problem 18E

The condensed structural formula of $2,2-\text{dimethylbutane}$ is shown below.

Explanation of Solution

The $\text{IUPAC}$ name of the given compound is $2,2-\text{dimethylbutane}$. Butane means that four carbon atoms are present in the structure and the suffix “ane” represents that the compound is alkane.

Figure 2

The numbering is assigned to the carbon atoms according to the longest continuous chain of carbon atoms. The $\text{dimethyl}$ represents that two methyl $\left({\text{CH}}_{\text{3}}\right)$ groups are substituted atom of the carbon atom of the chain. The numbers $2,2$ represents that both the ethyl groups are substituted at the same carbon that is carbon $-2$ as shown in Figure 2.

Conclusion

The condensed structural formula of $2,2-\text{dimethylbutane}$ is shown in Figure 2.

Interpretation Introduction

(c)

Interpretation:

The condensed structural formula of $3-\text{ethylheptane}$ is to be stated.

Concept introduction:

The condensed structural formula is a way of representation or writing organic structures in a line. The lines are drawn between bonded atoms, but the bond between carbon-hydrogen should be omitted.

Answer to Problem 18E

The condensed structural formula of $3-\text{ethylheptane}$ is shown below.

Explanation of Solution

The $\text{IUPAC}$ name of the given compound is $3-\text{ethylheptane}$. Heptane means that seven carbon atoms are present in the structure and the suffix “ane” represents that the compound is alkane.

Figure 3

The numbering is assigned to the carbon atoms according to the longest continuous chain of carbon atoms. The $3-\text{ethyl}$ represents that one ethyl $\left({\text{CH}}_{\text{2}}-{\text{CH}}_{\text{3}}\right)$ group is substituted at the carbon $-3$ as shown in Figure 3.

Conclusion

The condensed structural formula of $3-\text{ethylheptane}$ is shown in Figure 3.

Interpretation Introduction

(d)

Interpretation:

The condensed structural formula of $3,3-\text{diethylpentane}$ is to be stated.

Concept introduction:

The condensed structural formula is a way of representation or writing organic structures in a line. The lines are drawn between bonded atoms, but the bond between carbon-hydrogen should be omitted.

Answer to Problem 18E

The condensed structural formula of $3,3-\text{diethylpentane}$ is shown below.

Explanation of Solution

The $\text{IUPAC}$ name of the given compound is $3,3-\text{diethylpentane}$. Pentane means that five carbon atoms are present in the structure and the suffix “ane” represents that the compound is alkane.

Figure 4

The numbering is assigned to the carbon atoms according to the longest continuous chain of carbon atoms. The diethyl represents that two ethyl $\left({\text{C}}_2{\text{H}}_5-{\text{C}}_2{\text{H}}_5\right)$ groups are substituted at one of the carbon atom of the chain. The numbers $3,3$ represents that both the ethyl groups are substituted at the same carbon that is carbon $-3$ as shown in Figure 4.

Conclusion

The condensed structural formula of $3,3-\text{diethylpentane}$ is shown in Figure 4.