cis, 2 - Butene on reaction with $B r_{2}$ in $C C l_{4}$ produces mainly _______.

1-bromo-2-butene

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2,3-dibromobutane

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meso-2,3-dibromobutane

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(\pm)

2,3-dibromobutane

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Solution

The correct option is D $(\pm)$ 2,3-dibromobutane
cis,2--Butene on reaction with $B r_{2}$ in $C C l_{4}$ produces mainly (±) 2,3dibromobutane. A molecule of bromine is added across C=C double bond. A racemic mixture is obtained as the product.

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Similar questions

B r_{2}

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It is given that when (±)-2,3-dibromobutane reacts with $K O H$ , some of the products formed are:

Explain via mechanism and then choose the correct ones from the following.

Monosubstitution of (2S,3S)-2,3-dibromobutane using $O H^{-}$ yields a mixture of products.
Monosubstitution of (2S,3S)-2,3-dibromobutane using $O H^{-}$ yields a single major product.
Monosubstitution of (2R,3R)-2,3-dibromobutane using $O H^{-}$ yields a mixture of products.
Monosubstitution of (2S,3S)-2,3-dibromobutane using $O H^{-}$ yields a mixture of products.

S t a t e m e n t

B r_{2}

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