Chapter 19, Problem 28E

Interpretation Introduction

(a)

Interpretation:

The condensed structural formula of the compound having IUPAC name $\text{1-propyne}$ is to be stated.

Concept introduction:

The systematic naming of organic compound is given by IUPAC nomenclature. The naming of organic compound is offered by some set of rules to provide each compound with its unique name.

Answer to Problem 28E

The condensed structural formula is ${\text{CH}}_{\text{3}}-\text{C}\equiv \text{CH}$.

Explanation of Solution

The condensed structural formula is the structural representation of the compound showing only carbon bonds, not the carbon and hydrogen bonds. The structural formula is represented in the straight chain and branching if they are present.

The given IUPAC name is $\text{1-propyne}$.

This name suggests a three carbon chain as a prefix is “prop” and the functional group is alkyne as a suffix is “yne”. The functional group is present at position one or carbon $\text{-1}$.

Therefore, the condensed structural formula is ${\text{CH}}_{\text{3}}-\text{C}\equiv \text{CH}$.

Conclusion

The condensed structural formula of the compound $\text{1-propyne}$ is ${\text{CH}}_{\text{3}}-\text{C}\equiv \text{CH}$.

Interpretation Introduction

(b)

Interpretation:

The condensed structural formula of the compound having IUPAC name $\text{4-octyne}$ is to be stated.

Concept introduction:

The systematic naming of organic compound is given by IUPAC nomenclature. The naming of organic compound is offered by some set of rules to provide each compound with its unique name.

Answer to Problem 28E

The condensed structural formula is ${\text{CH}}_{\text{3}}-{\text{CH}}_{\text{2}}-{\text{CH}}_{\text{2}}-\text{C}\equiv \text{C}-{\text{CH}}_{\text{2}}-{\text{CH}}_{\text{2}}-{\text{CH}}_{\text{3}}$.

Explanation of Solution

The condensed structural formula is the structural representation of the compound showing only carbon bonds, not the carbon and hydrogen bonds. The structural formula is represented in the straight chain and branching if they are present.

The given IUPAC name is $\text{4-octyne}$.

This name suggests an eight carbon chain as a prefix is “oct” and the functional group is alkyne as a suffix is “yne”. The functional group is present at position one or carbon $\text{-4}$.

Therefore the condensed structural formula is

${\text{CH}}_{\text{3}}-{\text{CH}}_{\text{2}}-{\text{CH}}_{\text{2}}-\text{C}\equiv \text{C}-{\text{CH}}_{\text{2}}-{\text{CH}}_{\text{2}}-{\text{CH}}_{\text{3}}$.

Conclusion

The condensed structural formula of the compound $\text{4-octyne}$ is

${\text{CH}}_{\text{3}}-{\text{CH}}_{\text{2}}-{\text{CH}}_{\text{2}}-\text{C}\equiv \text{C}-{\text{CH}}_{\text{2}}-{\text{CH}}_{\text{2}}-{\text{CH}}_{\text{3}}$.

Interpretation Introduction

(c)

Interpretation:

The condensed structural formula of the compound having IUPAC name $\text{2-butyne}$ is to be stated.

Concept introduction:

The systematic naming of organic compound is given by IUPAC nomenclature. The naming of organic compound is offered by some set of rules to provide each compound with its unique name.

Answer to Problem 28E

The condensed structural formula is ${\text{CH}}_{\text{3}}-\text{C}\equiv \text{C}-{\text{CH}}_{\text{3}}$.

Explanation of Solution

The condensed structural formula is the structural representation of the compound showing only carbon bonds, not the carbon and hydrogen bonds. The structural formula is represented in the straight chain and branching if they are present.

The given IUPAC name is $\text{2-butyne}$.

This name suggests a four carbon chain as a prefix is “but” and the functional group is alkyne as a suffix is “yne”. The functional group is present at position one or carbon $\text{-2}$.

Therefore the condensed structural formula is ${\text{CH}}_{\text{3}}-\text{C}\equiv \text{C}-{\text{CH}}_{\text{3}}$.

Conclusion

The condensed structural formula of the compound $\text{2-butyne}$ is ${\text{CH}}_{\text{3}}-\text{C}\equiv \text{C}-{\text{CH}}_{\text{3}}$.

Interpretation Introduction

(d)

Interpretation:

The condensed structural formula of the compound having IUPAC name $\text{3-decyne}$ is to be stated.

Concept introduction:

The systematic naming of organic compound is given by IUPAC nomenclature. The naming of organic compound is offered by some set of rules to provide each compound with its unique name.

Answer to Problem 28E

The condensed structural formula is

${\text{CH}}_{\text{3}}-{\text{CH}}_{\text{2}}-{\text{CH}}_{\text{2}}-{\text{CH}}_{\text{2}}-{\text{CH}}_{\text{2}}-{\text{CH}}_{\text{2}}-\text{C}\equiv \text{C}-{\text{CH}}_{\text{2}}-{\text{CH}}_{\text{3}}$.

Explanation of Solution

The condensed structural formula is the structural representation of the compound showing only carbon bonds, not the carbon and hydrogen bonds. The structural formula is represented in the straight chain and branching if they are present.

The given IUPAC name is $\text{3-decyne}$.

This name suggests a ten carbon chain as a prefix is “dec” and the functional group is alkyne as a suffix is “yne”. The functional group is present at position one or carbon $\text{-3}$.

Therefore the condensed structural formula is

${\text{CH}}_{\text{3}}-{\text{CH}}_{\text{2}}-{\text{CH}}_{\text{2}}-{\text{CH}}_{\text{2}}-{\text{CH}}_{\text{2}}-{\text{CH}}_{\text{2}}-\text{C}\equiv \text{C}-{\text{CH}}_{\text{2}}-{\text{CH}}_{\text{3}}$.

Conclusion

The condensed structural formula of the compound $\text{3-decyne}$ is

${\text{CH}}_{\text{3}}-{\text{CH}}_{\text{2}}-{\text{CH}}_{\text{2}}-{\text{CH}}_{\text{2}}-{\text{CH}}_{\text{2}}-{\text{CH}}_{\text{2}}-\text{C}\equiv \text{C}-{\text{CH}}_{\text{2}}-{\text{CH}}_{\text{3}}$.