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Electrophilic Substitution

Excess of iso...

Question

Excess of isobutane on reaction with $B r_{2}$ in presence of light at $125^{o} C$ gives which one of the following, as the major product?

A

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B

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C

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D

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Solution

The correct option is A

Halogenation alkane undergoes free radical mechanism.
Tertiary free radicals are more stable tha primary,
Hence, $C - H$ bond breaking is favourable in tertiary carbon and thus, it gives the major product as shown below:

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