Chapter 19, Problem 19.1P

Interpretation Introduction

(a)

Interpretation:

The structure for the compound isobutryaldehyde is to be drawn.

Concept introduction:

IUPAC stands for International Union of Pure and Applied Chemistry. The IUPAC gave certain rules which are used worldwide to name the organic compounds. Due to IUPAC naming, each compound has a unique name which is different from their common name.

Answer to Problem 19.1P

The structure of isobutrylaldehyde is shown below.

Explanation of Solution

Isobutrylaldehyde is a compound containing 4 carbon atoms and aldehyde as a functional group. In the naming of a compound first the parent chain has to be identified and in this compound, the parent chain is propane and methyl group $\left({\text{CH}}_{\text{3}}\right)$ acts as a substituent. So, the structure of the compound is given below.

Figure 1

The IUPAC name of the compound is $2-methylpropanal$.

Conclusion

The structure for the compound isobutrylaldehyde is shown in Figure 1.

Interpretation Introduction

(b)

Interpretation:

The structure for the compound valerophenone is to be drawn.

Concept introduction:

IUPAC stands for International Union of Pure and Applied Chemistry. The IUPAC gave certain rules which are used worldwide to name the organic compounds. Due to IUPAC naming, each compound has a unique name which is different from their common name.

Answer to Problem 19.1P

The structure of valerophenone is given below.

Explanation of Solution

Valerophenone is the name of the compound having $1$ phenyl ring, 1 butyl group and ketone as the functional group. This compound is an aromatic compound. According to IUPAC nomenclature valerophenone can be named as $\text{1-phenylpentan-1-one}$. The structure for the compound is shown below.

Figure 2

Conclusion

The structure for the compound valerophenone is shown in Figure 2.

Interpretation Introduction

(c)

Interpretation:

The structure for the compound $\text{o}-\text{bromoacetophenone}$ is to be drawn.

Concept introduction:

IUPAC stands for International Union of Pure and Applied Chemistry. The IUPAC gave certain rules which are used worldwide to name the organic compounds. Due to IUPAC naming, each compound has a unique name which is different from their common name.

Answer to Problem 19.1P

The structure of $\text{o}-\text{bromoacetophenone}$ is shown below.

Explanation of Solution

The compound $\text{o}-\text{bromoacetophenone}$ contains one phenyl ring and an acetyl group. Bromine is attached to the ortho position which is the second position of the phenyl ring this also indicates that the benzene ring is disubstituted. The structure for the compound is shown below.

Figure 3

Conclusion

The structure of the compound $\text{o}-\text{bromoacetophenone}$ is shown in Figure 3.

Interpretation Introduction

(d)

Interpretation:

The structure for the compound $\text{γ-chlorobutyraldehyde}$ is to be drawn.

Concept introduction:

IUPAC stands for International Union of Pure and Applied Chemistry. The IUPAC gave certain rules which are used worldwide to name the organic compounds. Due to IUPAC naming, each compound has a unique name which is different from their common name.

Answer to Problem 19.1P

The structure of the compound $\text{γ}-\text{chlorobutyraldehyde}$ is given below.

Explanation of Solution

The compound given in the question is $\text{γ}-\text{chlorobutyraldehyde}$ which have aldehyde as the functional group. The symbol $\text{γ}$ used in $\text{γ}-\text{chlorobutyraldehyde}$ denotes the position of the carbon atom to which chlorine is attached. The structure of the compound $\text{γ-chlorobutyraldehyde}$ is shown in the figure below.

Figure 4

The IUPAC name of the compound is $\text{4-chlorobutanal}$.

Conclusion

The structure of the compound $\text{γ}-\text{chlorobutyraldehyde}$ is shown in Figure 4.

Interpretation Introduction

(e)

Interpretation:

The structure for the compound $\text{3}-\text{hydroxy}-\text{2}-\text{butanone}$ is to be drawn.

Concept introduction:

IUPAC stands for International Union of Pure and Applied Chemistry. The IUPAC gave certain rules which are used worldwide to name the organic compounds. Due to IUPAC naming, each compound has a unique name which is different from their common name.

Answer to Problem 19.1P

The structure for the compound $\text{3}-\text{hydroxy}-\text{2}-\text{butanone}$ is given below.

Explanation of Solution

The compound $\text{3}-\text{hydroxy}-\text{2}-\text{butanone}$ is a compound having 4 carbon atoms and ketone as the functional group, hydroxy group act as a substituent. The priority of ketone is higher than that of the alcohol group so it is considered as a substituent.

This compound is also known as acetyl methyl carbinol. The structure of the compound is shown below.

Figure 5

Conclusion

The structure of the compound $\text{3}-\text{hydroxy}-\text{2}-\text{butanone}$ is shown in Figure 5.

Interpretation Introduction

(f)

Interpretation:

The structure for the compound $4-\left(2-\text{chlorobutyryl}\right)\text{benzaldehyde}$ is to be drawn.

Concept introduction:

IUPAC stands for International Union of Pure and Applied Chemistry. The IUPAC gave certain rules which are used worldwide to name the organic compounds. Due to IUPAC naming, each compound has a unique name which is different from their common name.

Answer to Problem 19.1P

The structure for the compound $4-\left(2-\text{chlorobutyryl}\right)\text{benzaldehyde}$ is shown below.

Explanation of Solution

The compound $4-\left(2-\text{chlorobutyryl}\right)\text{benzaldehyde}$ is an aromatic compound due to the presence of a benzene ring which is disubstituted. The compound contains aldehyde as the functional group. Chlorine is attached as a substituent. The structure of the compound $4-\left(2-\text{chlorobutyryl}\right)\text{benzaldehyde}$ is given below.

Figure 6

Conclusion

The structure of the compound $4-\left(2-\text{chlorobutyryl}\right)\text{benzaldehyde}$ is shown in Figure 6.

Interpretation Introduction

(g)

Interpretation:

The structure for the compound $3-\text{cyclohexenone}$ is to be drawn.

Concept introduction:

IUPAC stands for International Union of Pure and Applied Chemistry. The IUPAC gave certain rules which are used worldwide to name the organic compounds. Due to IUPAC naming, each compound has a unique name which is different from their common name

Answer to Problem 19.1P

The structure for the compound $3-\text{cyclohexenone}$ is shown below.

Explanation of Solution

The compound $3-\text{cyclohexenone}$ is a cyclic structure having one double bond at position 3 and ketone being the main functional group. This compound is a nonaromatic compound as there is no conjugation present. The structure of the compound $3-\text{cyclohexenone}$ is shown in the figure below.

Figure 7

Conclusion

The structure of the compound $3-\text{cyclohexenone}$ is given in Figure 7.

Interpretation Introduction

(h)

Interpretation:

The structure for the compound $2-\text{oxocyclopentanecarbaldehyde}$ is to be drawn.

Concept introduction:

IUPAC stands for International Union of Pure and Applied Chemistry. The IUPAC gave certain rules which are used worldwide to name the organic compounds. Due to IUPAC naming, each compound has a unique name which is different from their common name

Answer to Problem 19.1P

The structure of the compound $2-\text{oxocyclopentanecarbaldehyde}$ is shown below.

Explanation of Solution

The compound $2-\text{oxocyclopentanecarbaldehyde}$ has aldehyde as a functional group. The suffix carbaldehyde is used when the aldehyde group is attached to a ring or ring atoms. The oxo group is attached at the second position of the ring. The structure for the compound is shown in the figure below.

Figure 8

Conclusion

The structure of the compound $2-\text{oxocyclopentanecarbaldehyde}$ is shown in Figure 8.