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Halogenation is a substitution reaction,...

Halogenation is a substitution reaction, where halogen replaces one or more hydrogens of hydrocarbon.

Chlorine free radical make `1^(@), 2^(@), 3^(@)` 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 slective whereas chlorine is less selective and more reactive.
The relative rate of abstraction of hydrogen by Br is
`{:(3^(@),gt,2^(@),gt,1^(@)),((1600),,(82),,(1)):}`
The relative rate of abstraction of hydrogen by Cl is
`{:(3^(@),gt,2^(@),gt,1^(@)),((5),,(3.8),,(1)):}`
1-halo-2, 3-dimethyl butane will be obtained in better yields, if halogen is :

A

`Br_(2)`

B

`Cl_(2)`

C

`I_(2)`

D

Can't be predicted

Text Solution

Verified by Experts

The correct Answer is:
B

`Cl_(2)` is less selective `therefore 1^(@)` halide will be obtained in better yield.
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Halogenation is a substitution reaction, where halogen replaces one or more hydrogens of hydrocarbon. Chlorine free radical make 1^(@), 2^(@), 3^(@) 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 slective whereas chlorine is less selective and more reactive. The relative rate of abstraction of hydrogen by Br is {:(3^(@),gt,2^(@),gt,1^(@)),((1600),,(82),,(1)):} The relative rate of abstraction of hydrogen by Cl is {:(3^(@),gt,2^(@),gt,1^(@)),((5),,(3.8),,(1)):} Above product will obtained in better yield if X is

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What are free radicals.

Define:Free radicals,

What are the free radicals?

The most stable free radical is :