Ionic addition of bromine to $c i s - 2 - b u t e n e$ yields.

m e s o - 2, 3 - d i b r o m o b u t a n e

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(d l) - 2, 3, - d i b r o m o b u t a n e

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(d) - 2, 3, - d i b r o m o b u t a n e

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(l) - 2, 3, - d i b r o m o b u t a n e

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Solution

The correct option is A $(d l) - 2, 3, - d i b r o m o b u t a n e$

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Assertion : Addition of bromine to trans-2-butene yields meso-2, 3-dibromobutane

Reason : Bromine addition to an alkene is an electrophilic addition.

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.

During debromination of meso-2,3-dibromobutane,the major compound formed is

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