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Preparation of Alkyl Halides

CH2=CH-NO2+HB...

Question

$C H_{2} = C H - N O_{2} + H B r \to P$ ; The major product $^{'} P^{'}$ is:

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
When 1-Nitroethene, $C H_{2} = C H - N O_{2}$ , is reacted with hydrogen bromide $(H B r)$ , the product formed is $B r - C H_{2} - C H_{2} - N O_{2}$ .

This reaction does not follow Markovnikov addition .
Due to the presence of the nitro group , the positive charge is developed on the second carbon. So, the bromide ion goes for the second carbon and the hydrogen cation goes to the first carbon attached to the nitro group .

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C H_{2} = C H - N O_{2} + H B r \to P

; The major product

^{'} P^{'}

{C H}_{3} - C H = {C H}_{2} + H B r ⟶ ?

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

P (Major product)

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Q. Let us consider the following reaction

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.
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Write the products of:

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