MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Nucleophilic Substitution in Aryl Halides

The relative ...

Question

The relative reactivity of 1, 2^° and 3^° hydrogens in chlorination reaction has been found to be 1:3.8:5. In the reaction The ratio of the amount of the product A, B, C and D is expected to be(2) 3 : 7.6 :5:6(4) 1 :7.6 5: 1(1) 1:3.8: 5(3) 3:78:5:3

Open in App

Solution

Suggest Corrections

thumbs-up

51

Similar questions

Q. The relative reactivity of

1^{o} H, 2^{o} H

3^{o} H

in bromination reaction has been found to be 1 : 82 : 1600 respectively. In the reaction the percentage yields of the products (A) and (B)
are expected to be:

In chlorination the relation rate of abstraction of H in $3^{\circ}, 2^{\circ}$ and $1^{\circ} C$ atom respectively

C H_{3} - C H_{3} | C H - C H_{3}

B r_{2} h v - \to C H_{3} - C H_{3} | C | B r - C H_{3} + C H_{3} - C H_{3} | C H - C H_{2} - B r

The relative reactivity of

1^{o} H, 2^{o} H

3^{o} H

in bromination reaction has been found to be 1:82:1600 respectively. In the reaction the percentage yields of the products (A) and (B) are expected to be

Q. Halogenation is a substitution reaction, where halogen replaces one or more hydrogens of hydrocarbon.
Chlorine free radical make

1^{\circ}, 2^{\circ}, 3^{\circ}

radicals with almost equal ease, whereas bromine free radicals have a clear preference for the formation of tertiary free radicals. So , bromine is less reactive, and more selective whereas chlorine is less selective and more effective.
The relative rate of abstraction of hydrogen by Br is

3^{\circ} (1600) > 2^{\circ} (82) > 1^{\circ} (1)

The relative rate of abstraction of hydrogen by Cl is

3^{\circ} (5) > 2^{\circ} (3.8) > 1^{\circ} (1)

A.1 -halo -2, 3 -dimethyl butane will be obtained in better yields, if halogen is :

Q. Halogenation is a substitution reaction, where halogen replaces one or more hydrogens of hydrocarbon.
Chlorine free radical make

1^{\circ}, 2^{\circ}, 3^{\circ}

radicals with almost equal ease, whereas bromine free radicals have a clear preference for the formation of tertiary free radicals. So , bromine is less reactive, and more selective whereas chlorine is less selective and more effective.
The relative rate of abstraction of hydrogen by Br is

3^{\circ} (1600) > 2^{\circ} (82) > 1^{\circ} (1)

The relative rate of abstraction of hydrogen by Cl is

3^{\circ} (5) > 2^{\circ} (3.8) > 1^{\circ} (1)

F. What would be the product ratio x/y in the chlorination of propane if all the hydrogen were abstracted at equal rate ?

C H_{3} - C H_{2} - C H_{3} C l_{2} - - \to h v C H_{3} - C H_{2} - C (x) H_{2} - C l + C H_{3} - C | C l (y) H - C H_{3}

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Reactions of Haloarenes

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Nucleophilic Substitution in Aryl Halides

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon