Me-Me B CIdentify the compound C-

The correct option is A #160;2,3 dibromobutane Me ≡ Me CH_3CH=CHCH_3 CH_3CH(Br)CH(Br)CH_3 In the given reaction butyne undergoes hydrogenation to form b ...

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Byju's Answer

Standard XII

Chemistry

Hydrogenation of Alkynes

Me-≡-Me B CId...

Question

$M e - \equiv - M e N a + L i q . N H_{3} - ------- \to + E t O H (B) B r_{2} / C C l_{4} - ----- \to C$

Identify the compound C:

2,3-dibromobutane

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2-bromobutane

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2-butyne

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1,2-dibromobutane

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Solution

The correct option is A 2,3-dibromobutane
$M e - \equiv - M e N a + L i q . N H_{3} - ------- \to + E t O H C H_{3} C H = C H C H_{3} B r_{2} / C C l_{4} - ----- \to C H_{3} C H (B r) C H (B r) C H_{3}$

In the given reaction butyne undergoes hydrogenation to form butene which on bromination in presence of $C C l_{4}$ undergoes bromination to form 2,3-dibromobutane.

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Similar questions

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

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.

Q. The conversion of 2,3-dibromobutane to 2-butene with

Z n

is:

Q. Assertion : Cis-But-2-ene and trans-but-2-ene on reaction with

B r_{2}

C C l_{4}

gives meso-2,3-dibromobutane and (dl) 2,3-dibromobutane respectively.
Reason : Addition of

B r_{2}

on double bond involved anti addition.

Q. 2, 3 - dibromobutane can be converted to 2 - butyne in a two -step reaction using

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Me−≡−MeNa+Liq.NH3−−−−−−−−→+EtOH(B)Br2/CCl4−−−−−−→CIdentify the compound C:

$M e - \equiv - M e N a + L i q . N H_{3} - ------- \to + E t O H (B) B r_{2} / C C l_{4} - ----- \to C$

Identify the compound C: