Consider the following transformations- H - C - C - CH 2- CH 2- CH 3- H 3 C - CH - CH - CH 2- CH 3Which reaction sequence will bring about the above transformation-A- i H 2 - P d CaCO 3 ii HBr iii KOH -EtOHB- i N aN H 2 - H 2 iiBre-CCl 4 iii KOH -EtOHC- i H 2 - P d - Cii Cl 2 - hv iii KOH -EtOHD- i P d - CaCO 3ii Cl 2- CCl 4 iii KOH - EtOH

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Addition Reactions

Consider the ...

Question

Consider the following transformations.
$H - C \equiv C - C H_{2} - C H_{2} - C H_{3} \to H_{3} C - C H = C H - C H_{2} - C H_{3}$
Which reaction sequence will bring about the above transformation?

(i) H_{2} / P d - C (i i) C l_{2} / h v (i i i) K O H / E t O H

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(i) H_{2} / P d C a C O_{3} (i i) H B r (i i i) K O H / E t O H

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(i) N a N H_{2} / H_{2} (i i) B r_{2} / C C l_{4} (i i i) K O H / E t O H

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(i) P d / C a C O_{3} (i i) C l_{2} - C C l_{4} (i i i) K O H / E t O H

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Solution

The correct option is B $(i) H_{2} / P d C a C O_{3} (i i) H B r (i i i) K O H / E t O H$
First reaction is Partial hydrogenation of alkyne in presence of Lindlar's catalyst then electrophilic addition of HBr and then dehydrohalogenation. $H - C \equiv C - C H_{2} - C H_{2} - C H_{3} H_{2}, P d - --- \to C a C O_{3}$
$H_{2} C = C H - C H_{2} - C H_{2} - C H_{3} H B r ⟶$
$H_{3} C - B r | C H - C H_{2} - C H_{2} - C H_{3} a l c . K O H ⟶ H_{3} C - C H = C H - C H_{2} - C H_{3}$

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Similar questions

Q. Consider the following transformations.

H - C \equiv C - C H_{2} - C H_{2} - C H_{3} \to H_{3} C - C H = C H - C H_{2} - C H_{3}

Which reaction sequence will bring about the above transformation?

Q. Consider the following carbocations
I.

C H_{3} - C^{⨁} H_{2}

II.

C H_{2} = C^{⨁} H

III.

C H_{2} = C H - C^{⨁} H_{2}

IV.

C_{6} H_{5} - C H_{2}^{⨁}

Stability of these carbocations in decreasing order is?

Q. Arrange the following alkyl halides in decreasing order of the rate of

β

- elimination reaction with alcoholic KOH.

{C H}_{3} {C H}_{2} {C H}_{2} B r {C H}_{3} - C H | {C H}_{3} - {C H}_{2} B r {C H}_{3} - {C H}_{2} - C H | B r - {C H}_{3}

(i) (ii) (iii)

What are the hybridization states of each carbon atom(s) in the following molecules ?

(i) $C H_{3} * C H_{2} C H_{2} C H_{3}$

(ii) $C H_{2} = C^{*} H - C H = C H_{2}$

(iii) $C H_{3} * C H = C H - C H_{3}$

(iv) $H - * C \equiv C - H$

Which are free radical reactions

$I . C H_{3} - C H = C H_{2} + H B r P e r o x i d e - ---- \to C H_{3} - C H_{2} - C H_{2} B r I I . C H_{3} - C H = C H_{2} + H B r \to C H_{3} - C H B r - C H_{3} I I I . C H_{3} - C H = C H_{2} + C l_{2} \to C l C H_{2} - C H = C H_{2} I V . C H_{3} - C H_{3} + C l_{2} \to C l C H_{2} - C H_{3}$

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Addition Reactions

Standard XII Chemistry

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Consider the following transformations. H−C≡C−CH2−CH2−CH3→H3C−CH=CH−CH2−CH3 Which reaction sequence will bring about the above transformation?

Consider the following transformations.
$H - C \equiv C - C H_{2} - C H_{2} - C H_{3} \to H_{3} C - C H = C H - C H_{2} - C H_{3}$
Which reaction sequence will bring about the above transformation?