Chapter 22, Problem 22.19P

(a)

Interpretation Introduction

Interpretation:

Given compounds has to be arranged in their decreasing order of reactivity towards electrophilic aromatic substitution.

Explanation of Solution

Given compounds,

General trend of compounds reactivity in electrophilic aromatic substitution for a set of compounds having similar structure is given by,

$\begin{array}{l}Presenceofelectrondonatingsubstituents>Nosubstituents\\ >Electronwithdrawingsubstituents\end{array}$

So, electron donating substituents will increases the reactivity, while electron withdrawing substituents will decreases the reactivity.

Therefore, the decreasing order of reactivity towards electrophilic aromatic substitution of the given compounds are given below,

$B>A>C$

(b)

Interpretation Introduction

Interpretation:

Given compounds has to be arranged in their decreasing order of reactivity towards electrophilic aromatic substitution.

Explanation of Solution

Given compounds,

General trend of compounds reactivity in electrophilic aromatic substitution for a set of compounds having similar structure is given by,

$\begin{array}{l}Presenceofelectrondonatingsubstituents>Nosubstituents\\ >Electronwithdrawingsubstituents\end{array}$

So, electron donating substituents will increases the reactivity, while electron withdrawing substituents will decreases the reactivity.

Therefore, the decreasing order of reactivity towards electrophilic aromatic substitution of the given compounds are given below,

$C>B>A$

(c)

Interpretation Introduction

Interpretation:

Given compounds has to be arranged in their decreasing order of reactivity towards electrophilic aromatic substitution.

Explanation of Solution

Given compounds,

General trend of compounds reactivity in electrophilic aromatic substitution for a set of compounds having similar structure is given by,

$\begin{array}{l}Presenceofelectrondonatingsubstituents>Nosubstituents\\ >Electronwithdrawingsubstituents\end{array}$

So, electron donating substituents will increases the reactivity, while electron withdrawing substituents will decreases the reactivity.

Therefore, the decreasing order of reactivity towards electrophilic aromatic substitution of the given compounds are given below,

$A>B>C$

(d)

Interpretation Introduction

Interpretation:

Given compounds has to be arranged in their decreasing order of reactivity towards electrophilic aromatic substitution.

Explanation of Solution

Given compounds,

General trend of compounds reactivity in electrophilic aromatic substitution for a set of compounds having similar structure is given by,

$\begin{array}{l}Presenceofelectrondonatingsubstituents>Nosubstituents\\ >Electronwithdrawingsubstituents\end{array}$

So, electron donating substituents will increases the reactivity, while electron withdrawing substituents will decreases the reactivity.

Therefore, the decreasing order of reactivity towards electrophilic aromatic substitution of the given compounds are given below,

$C>A>B$

(e)

Interpretation Introduction

Interpretation:

Given compounds has to be arranged in their decreasing order of reactivity towards electrophilic aromatic substitution.

Explanation of Solution

Given compounds,

General trend of compounds reactivity in electrophilic aromatic substitution for a set of compounds having similar structure is given by,

$\begin{array}{l}Presenceofelectrondonatingsubstituents>Nosubstituents\\ >Electronwithdrawingsubstituents\end{array}$

So, electron donating substituents will increases the reactivity, while electron withdrawing substituents will decreases the reactivity.

Therefore, the decreasing order of reactivity towards electrophilic aromatic substitution of the given compounds are given below,

$A>B>C$