Chapter 15, Problem 36P

(a)

Interpretation Introduction

Interpretation: The IUPAC name of the given compound must be interpreted.

  

Concept introduction: Organic compounds are the compounds which are mainly composed C and H atoms. The branch of chemistry that deals with preparation, reactions, and properties of organic compounds. The molecular formula of organic compound represents the number of bonded atoms with their atomic symbols.

Functional groups are the groups of atoms or atoms which are bonded with parent carbon chain in the organic molecule and are responsible for the physical and chemical properties of the compound. In organic chemistry, there are different functional groups such as carboxylic acid, alcohol, ester, or amide.

Answer to Problem 36P

3-chlorobenzoic acid or m-chlorobenzoic acid

Explanation of Solution

In the given structure, there is an aromatic ring with $\text{–COOH}$ and $\text{-Cl}$ group. Since $\text{–COOH}$ group is more prior than $\text{-Cl}$ therefore benzene with −COOH group must be benzoic acid. Here −oic acid is the suffix for $\text{–COOH}$ group. The $\text{-Cl}$ group is placed at the 3^rd position of $\text{–COOH}$ so it must be 3-chlorobenzoic acid or m-chlorobenzoic acid.

(b)

Interpretation Introduction

Interpretation: The IUPAC name of the given compound must be interpreted.

  

Concept introduction: Organic compounds are the compounds which are mainly composed C and H atoms. The branch of chemistry that deals with preparation, reactions, and properties of organic compounds. The molecular formula of organic compound represents the number of bonded atoms with their atomic symbols.

Functional groups are the groups of atoms or atoms which are bonded with parent carbon chain in the organic molecule and are responsible for the physical and chemical properties of the compound. In organic chemistry, there are different functional groups such as carboxylic acid, alcohol, ester, or amide.

Answer to Problem 36P

4-nitroanisole or 1-methoxy-4-nitrobenzene

Explanation of Solution

In the given structure, there are two functional groups bonded on benzene ring. In this ${\text{–OCH}}_{\text{3}}$ is prior than ${\text{–NO}}_{\text{2}}$ group. Thus, ${\text{–NO}}_{\text{2}}$ must come as prefix in the IUPAC name. That makes the IUPAC name as 1-Methoxy-4-nitrobenzene. Since methoxybenzene is also called as anisole so it can be named as 4-Nitroanisole.

(c)

Interpretation Introduction

Interpretation: The IUPAC name of the given compound must be interpreted.

  

Concept introduction: Organic compounds are the compounds which are mainly composed C and H atoms. The branch of chemistry that deals with preparation, reactions, and properties of organic compounds. The molecular formula of organic compound represents the number of bonded atoms with their atomic symbols.

Functional groups are the groups of atoms or atoms which are bonded with parent carbon chain in the organic molecule and are responsible for the physical and chemical properties of the compound. In organic chemistry, there are different functional groups such as carboxylic acid, alcohol, ester, or amide.

Answer to Problem 36P

o-hydroxybenzaldehyde or salicylaldehyde

Explanation of Solution

In the given structure, there are two functional groups bonded on benzene ring. In this $\text{–CHO}$ is prior than $\text{–OH}$ group. Thus, $\text{–OH}$ must come as prefix in the IUPAC name. That makes the IUPAC name as o-hydroxybenzaldehyde. It is also called as salicylaldehyde.

(d)

Interpretation Introduction

Interpretation: The IUPAC name of the given compound must be interpreted.

  

Concept introduction: Organic compounds are the compounds which are mainly composed C and H atoms. The branch of chemistry that deals with preparation, reactions, and properties of organic compounds. The molecular formula of organic compound represents the number of bonded atoms with their atomic symbols.

Functional groups are the groups of atoms or atoms which are bonded with parent carbon chain in the organic molecule and are responsible for the physical and chemical properties of the compound. In organic chemistry, there are different functional groups such as carboxylic acid, alcohol, ester, or amide.

Answer to Problem 36P

3-aminobenzoic acid or m-aminobenzoic acid

Explanation of Solution

In the given structure, there is an aromatic ring with $\text{–COOH}$ and ${\text{-NH}}_2$ group. Since $\text{–COOH}$ group is more prior than ${\text{-NH}}_2$ therefore benzene with −COOH group must be benzoic acid. Here −oic acid is the suffix for $\text{–COOH}$ group. The ${\text{-NH}}_2$ group is placed at the 3^rd position of $\text{–COOH}$ so it must be 3-aminobenzoic acid or m-aminobenzoic acid.

(e)

Interpretation Introduction

Interpretation: The IUPAC name of the given compound must be interpreted.

  

Concept introduction: Organic compounds are the compounds which are mainly composed C and H atoms. The branch of chemistry that deals with preparation, reactions, and properties of organic compounds. The molecular formula of organic compound represents the number of bonded atoms with their atomic symbols.

Functional groups are the groups of atoms or atoms which are bonded with parent carbon chain in the organic molecule and are responsible for the physical and chemical properties of the compound. In organic chemistry, there are different functional groups such as carboxylic acid, alcohol, ester, or amide.

Answer to Problem 36P

4-ethyl-2-methylaniline.

Explanation of Solution

In the given structure, there is an aromatic ring with ${\text{–CH}}_3$ , ${\text{–CH}}_2{\text{CH}}_3$ and ${\text{-NH}}_2$ group. Since ${\text{-NH}}_2$ group is more prior than ${\text{–CH}}_3$ , ${\text{–CH}}_2{\text{CH}}_3$ therefore benzene with ${\text{-NH}}_2$ group must be aniline. The ${\text{–CH}}_3$ and ${\text{–CH}}_2{\text{CH}}_3$ are present at 2 and 4 position thus the name of molecule must be 4-ethyl-2-methylaniline.

(f)

Interpretation Introduction

Interpretation: The IUPAC name of the given compound must be interpreted.

  

Concept introduction: Organic compounds are the compounds which are mainly composed C and H atoms. The branch of chemistry that deals with preparation, reactions, and properties of organic compounds. The molecular formula of organic compound represents the number of bonded atoms with their atomic symbols.

Functional groups are the groups of atoms or atoms which are bonded with parent carbon chain in the organic molecule and are responsible for the physical and chemical properties of the compound. In organic chemistry, there are different functional groups such as carboxylic acid, alcohol, ester, or amide.

Answer to Problem 36P

4-bromo-3-methyltoluene

Explanation of Solution

In the given structure, there is an aromatic ring with ${\text{–CH}}_3$ and $\text{–Br}$ group. Since ${\text{–CH}}_3$ group is more prior than $\text{–Br}$ ,therefore benzene with ${\text{–CH}}_3$ group must be toluene. The ${\text{–CH}}_3$ and $\text{–Br}$ are present at 3 and 4 position thus the name of molecule must be 4-bromo-3-methyltoluene.

(g)

Interpretation Introduction

Interpretation: The IUPAC name of the given compound must be interpreted.

  

Concept introduction: Organic compounds are the compounds which are mainly composed C and H atoms. The branch of chemistry that deals with preparation, reactions, and properties of organic compounds. The molecular formula of organic compound represents the number of bonded atoms with their atomic symbols.

Functional groups are the groups of atoms or atoms which are bonded with parent carbon chain in the organic molecule and are responsible for the physical and chemical properties of the compound. In organic chemistry, there are different functional groups such as carboxylic acid, alcohol, ester, or amide.

Answer to Problem 36P

4-bromo-2,5-dimethoxyphenol

Explanation of Solution

In the given structure, there is an aromatic ring with ${\text{–OCH}}_3$ , $\text{–Br}$ and $\text{–OH}$ group. Since $\text{–OH}$ group is more prior than $\text{–Br}$ and ${\text{–OCH}}_3$ therefore benzene with $\text{–OH}$ group must be phenol. The ${\text{–OCH}}_3$ and $\text{–Br}$ are present at 2,5 and 4 position thus the name of molecule must be 4-bromo-2,5-dimethoxyphenol.

(h)

Interpretation Introduction

Interpretation: The IUPAC name of the given compound must be interpreted.

  

Concept introduction: Organic compounds are the compounds which are mainly composed C and H atoms. The branch of chemistry that deals with preparation, reactions, and properties of organic compounds. The molecular formula of organic compound represents the number of bonded atoms with their atomic symbols.

Functional groups are the groups of atoms or atoms which are bonded with parent carbon chain in the organic molecule and are responsible for the physical and chemical properties of the compound. In organic chemistry, there are different functional groups such as carboxylic acid, alcohol, ester, or amide.

Answer to Problem 36P

2-phenylethanol or Phenethyl alcohol

Explanation of Solution

In the given structure, there is an aromatic ring with $–C{H}_{2}C{H}_{2}OH$ group. Since the parent chain contains two carbon atom so the root word must be −eth with $\text{–OH}$ group as suffix that makes it ethanol. The phenyl ring is bonded with 2^nd carbon atom so the name of molecule must be 2-phenylethanol. It is also called Phenethyl alcohol.

(i)

Interpretation Introduction

Interpretation: The IUPAC name of the given compound must be interpreted.

  

Concept introduction: Organic compounds are the compounds which are mainly composed C and H atoms. The branch of chemistry that deals with preparation, reactions, and properties of organic compounds. The molecular formula of organic compound represents the number of bonded atoms with their atomic symbols.

Functional groups are the groups of atoms or atoms which are bonded with parent carbon chain in the organic molecule and are responsible for the physical and chemical properties of the compound. In organic chemistry, there are different functional groups such as carboxylic acid, alcohol, ester, or amide.

Answer to Problem 36P

1-bromo-8-chloro-naphthalene

Explanation of Solution

In the given structure, there are two aromatic rings bonded with two common carbon atoms. This is a bicyclic compound and named as naphthalene. Here two functional groups −Chloro and −bromo are bonded so they must be named as alphabetical order. It gives the name as 1-bromo-8-chloro-naphthalene.

(j)

Interpretation Introduction

Interpretation: The IUPAC name of the given compound must be interpreted.

  

Concept introduction: Organic compounds are the compounds which are mainly composed C and H atoms. The branch of chemistry that deals with preparation, reactions, and properties of organic compounds. The molecular formula of organic compound represents the number of bonded atoms with their atomic symbols.

Functional groups are the groups of atoms or atoms which are bonded with parent carbon chain in the organic molecule and are responsible for the physical and chemical properties of the compound. In organic chemistry, there are different functional groups such as carboxylic acid, alcohol, ester, or amide.

Answer to Problem 36P

3-acetyl-phenanthrene

Explanation of Solution

In the given structure, there are three aromatic rings bonded with some common carbon atoms. This is a bicyclic compound and named as phenanthrene. Here the functional groups −acetyl ${\text{-COCH}}_3$ is bonded at position 3. So the name of compound must be 3-acetyl-phenanthrene.