Chapter 4, Problem 4.45AP

Interpretation Introduction

(a)

Interpretation:

The IUPAC name of the given structure 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 the organic compound is correctly interpreted from the name.

Rules for writing IUPAC name from the structural formula are given below.

• First, identify the longest carbon chain.

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

• Identify the position, location, and a number of the substituents bonded to the carbon chain.

• Use prefix di, tri, tetra if the same type of substituents is present.

• Name the substituents in alphabetical order.

$E,Z$ configuration are named according to the priority order means that the atoms have greater atomic number is given the priority first. If the first priority order atoms present on same side of the structure then it is named by $Z$ configuration and vice versa for $E$ configuration.

Answer to Problem 4.45AP

The IUPAC name of the structure is written as $\text{3-ethyl-1-cyclopentene}$.

Explanation of Solution

The parent chain of the given structure is numbered as shown below.

Figure 1

In this structure, total five carbon atoms are present in a cyclic ring which suggest the name to be cyclopentane. It contains a double bond between $1-2$ locant position. There is also an ethyl group present at position $3$. Therefore, the given structure is named as $\text{3-ethyl-1-cyclopentene}$.

Conclusion

The IUPAC name of the given structure is written as $\text{3-ethyl-1-cyclopentene}$.

Interpretation Introduction

(b)

Interpretation:

The IUPAC name of the given structure 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 the organic compound is correctly interpreted from the name.

Rules for writing IUPAC name from the structural formula are given below.

• First, identify the longest carbon chain.

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

• Identify the position, location, and a number of the substituents bonded to the carbon chain.

• Use prefix di, tri, tetra if the same type of substituents is present.

• Name the substituents in alphabetical order.

$E,Z$ configuration are named according to the priority order means that the atoms have greater atomic number is given the priority first. If the first priority order atoms present on same side of the structure it is named by $Z$ configuration and vice versa for $E$ configuration.

Answer to Problem 4.45AP

The IUPAC name of the given structure is written as $\text{6-methyl-1-heptene}$.

Explanation of Solution

The parent chain of the given structure is numbered as shown below.

Figure 2

In this structure, total seven carbon atoms are present in a parent chain which suggest the name to be heptane. It also contains a double bond at locant position $1-2$. A methyl group is substituted at positon $6$. Therefore, the given structure is named as $\text{6-methyl-1-heptene}$.

Conclusion

The IUPAC name of the given structure is named as $\text{6-methyl-1-heptene}$.

Interpretation Introduction

(c)

Interpretation:

The IUPAC name of the given structure 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 the organic compound is correctly interpreted from the name.

Rules for writing IUPAC name from the structural formula are given below.

• First, identify the longest carbon chain.

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

• Identify the position, location, and a number of the substituents bonded to the carbon chain.

• Use prefix di, tri, tetra if the same type of substituents is present.

• Name the substituents in alphabetical order.

$E,Z$ configuration are named according to the priority order means that the atoms have greater atomic number is given the priority first. If the first priority order atoms present on same side of the structure it is named by $Z$ configuration and vice versa for $E$ configuration.

Answer to Problem 4.45AP

The IUPAC name of the structure is $\text{2-}\left(\text{1-methylethyl}\right)\text{-1-methyl-1, 3-cyclohexadiene}$.

Explanation of Solution

The parent chain of the given structure is numbered as shown below.

Figure 3

In this structure, total six carbon atoms are present in the cyclic ring which suggest the name to be cyclohexane. It also contained two double bonds at locant positions $1-2$ and $3-4$. A methyl group is substituted at position $1$. It contains an isopropyl group at position $2$ which is also identified according to IUPAC rules as $2-\left(1-\text{methylethyl}\right)$. Therefore, the IUPAC name of the given structure is written as $\text{2-}\left(\text{1-methylethyl}\right)\text{-1-methyl-1, 3-cyclohexadiene}$.

Conclusion

The IUPAC name of the given structure is named as shown below.

$\text{2-}\left(\text{1-methylethyl}\right)\text{-1-methyl-1, 3-cyclohexadiene}$

Interpretation Introduction

(d)

Interpretation:

The IUPAC name of the given structure 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 the organic compound is correctly interpreted from the name.

Rules for writing IUPAC name from the structural formula are given below.

• First, identify the longest carbon chain.

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

• Identify the position, location, and a number of the substituents bonded to the carbon chain.

• Use prefix di, tri, tetra if the same type of substituents is present.

• Name the substituents in alphabetical order.

$E,Z$ configuration are named according to the priority order means that the atoms have greater atomic number is given the priority first. If the first priority order atoms present on same side of the structure it is named by $Z$ configuration and vice versa for $E$ configuration.

Answer to Problem 4.45AP

The IUPAC name of the given structure is written as $\left(E\right)\text{-2-butyl-1, 3-pentadiene}$.

Explanation of Solution

The parent chain of the given structure is numbered as shown below.

Figure 4

In this structure, total five cabon atoms are presnt in a chain which suggest the name to be pentane. It also conatins two double bonds at locant position $1-2$ and $3-4$. There is also a possibility of $E$ isomer at position $3-4$ because two substituents present on opposite sides of the double bond. A butyl group is substituted at position $2$. Therefore, the name of the given structure is written as $\left(E\right)\text{-2-butyl-1, 3-pentadiene}$.

Conclusion

The IUPAC name of the given structure is named as $\left(E\right)\text{-2-butyl-1, 3-pentadiene}$.

Interpretation Introduction

(e)

Interpretation:

The IUPAC name of the given structure 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 the organic compound is correctly interpreted from the name.

Rules for writing IUPAC name from the structural formula are given below.

• First, identify the longest carbon chain.

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

• Identify the position, location, and a number of the substituents bonded to the carbon chain.

• Use prefix di, tri, tetra if the same type of substituents is present.

• Name the substituents in alphabetical order.

$E,Z$ configuration is named according to the priority order means that the atoms have greater atomic number is given the priority first. If the first priority order atoms present on the same side of the structure it is named by $Z$ configuration and vice versa for $E$ configuration.

Answer to Problem 4.45AP

The IUPAC name of the given structure is written as $\text{1, 1-bi}\left(\text{cyclopentene}\right)$.

Explanation of Solution

The parent chain of the given structure is numbered as shown below.

Figure 5

This molecule contains two similar cyclic ring structure means bi is used in this case. In this structure, total five carbon atoms are present with a double bond at position $1$. One ring is named as cyclopentene since it contains two rings bond to each other. It is named as $\text{1, 1-bi}\left(\text{cyclopentene}\right)$.

Conclusion

The IUPAC name of the given structure is named as $\text{1, 1-bi}\left(\text{cyclopentene}\right)$.

Interpretation Introduction

(f)

Interpretation:

The IUPAC name of the given structure 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 the organic compound is correctly interpreted from the name.

Rules for writing IUPAC name from the structural formula are given below.

• First, identify the longest carbon chain.

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

• Identify the position, location, and a number of the substituents bonded to the carbon chain.

• Use prefix di, tri, tetra if the same type of substituents is present.

• Name the substituents in alphabetical order.

$E,Z$ configuration are named according to the priority order means that the atoms have greater atomic number is given the priority first. If the first priority order atoms present on same side of the structure it is named by $Z$ configuration and vice versa for $E$ configuration.

Answer to Problem 4.45AP

The IUPAC name of the given structure is written as shown below.

$\left(E\right)\text{-5-}\left(\left(Z\right)\text{-1-propenyl}\right)\text{-1, 6-nonadiene}$

Explanation of Solution

The parent chain of the given structure is numbered as shown below.

Figure 6

In this structure, total nine carbon atoms are present which suggest the name to be nonane. It also contains two double bonds in the parent chain at positions $1-2$ and $6-7$. A propyl group is also present with a double bond at position $1$. It is named as propenyl at position $5$. There is also a possibility of $E$ isomer at $6-7$ position as both substituents are present on the opposite sides of the double bond. Therefore, the IUPAC name of the given structure is written as shown below.

$\left(E\right)\text{-5-}\left(\left(Z\right)\text{-1-propenyl}\right)\text{-1, 6-nonadiene}$

Conclusion

The IUPAC name of the given structre is named as shown below.

$\left(E\right)\text{-5-}\left(\left(Z\right)\text{-1-propenyl}\right)\text{-1, 6-nonadiene}$