CameraIcon

SearchIcon

MyQuestionIcon

1

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

Halides of Group 16

In chlorinati...

Question

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

A

5 : 3.8 : 2

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

5 : 3.8 : 1

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

C

1600 : 82 : 1

No worries! We‘ve got your back. Try BYJU‘S free classes today!

D

1600 : 5 : 82

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B
5 : 3.8 : 1

The chlorination of alkanes proceeds through the formation of alkyl free radical and the order of stability of free radical is $3^{\circ} > 2^{\circ} > 1^{\circ} C . T h e t e r t i a r y 3^{\circ}$ radical is more stable because it has more number of Hyper conjugative structures. Therefore the relative rate of abstraction of H in $3^{\circ}, 2^{\circ}$ and $1^{\circ}$ C atom is 5 : 3.8 : 1.

Suggest Corrections

thumbs-up

2

Similar questions

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}

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)

G. How many dichloro products (including stereoisomers) will be formed when R - 2 - chloropentane reacts with

C l_{2}

in presence of UV radiation ?

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)

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

2,Bromo-2,5,5 trimethyl hexane(x%)
What is the value of x(% yield of product) ?

Q. A hydrocarbon contains all the three of H atoms, i.e., 1, 2, and 3. The relative ratios of abstraction of ................... H atoms are 5.0 : 3.8 : 1.0.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Halides of Group 16

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Halides of Group 16

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon