The reagents to carry out the following conve | vedclass

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Question

(D) The starting material is $but-2-yne$ (or $CH_{3}-C \equiv C-CH_{3}$),but the image shows $prop-1-yne$ $(CH_{3}-C \equiv CH)$ being converted to $b

Vedclass · Accepted Answer

$NaNH_{2} / CH_{3}I ; HgSO_{4} / dil. \ H_{2}SO_{4}$

Vedclass · Answer

(D) The starting material is $but-2-yne$ (or $CH_{3}-C \equiv C-CH_{3}$),but the image shows $prop-1-yne$ $(CH_{3}-C \equiv CH)$ being converted to $butan-2-one$ $(CH_{3}-CO-CH_{2}-CH_{3})$.Step $1$: $CH_{3}-C \equiv CH + NaNH_{2} \rightarrow CH_{3}-C \equiv C^-Na^+ + NH_{3}$.Step $2$: $CH_{3}-C \equiv C^-Na^+ + CH_{3}I \rightarrow CH_{3}-C \equiv C-CH_{3} + NaI$.Step $3$: $CH_{3}-C \equiv C-CH_{3} + H_{2}O \xrightarrow{HgSO_{4} / dil. H_{2}SO_{4}} CH_{3}-C(OH)=CH-CH_{3}$ (enol form).Step $4$: The enol form undergoes tautomerization to form $CH_{3}-CO-CH_{2}-CH_{3}$ $(butan-2-one)$.Thus,the correct set of reagents is $NaNH_{2} / CH_{3}I ; HgSO_{4} / dil. \ H_{2}SO_{4}$.

The reagents to carry out the following conversion are:

Similar Questions

The major product obtained from the following reaction is

Write the following reactions:
$1$. Complete combustion of ethyne in the presence of air.
$2$. Reaction of propyne with alkaline $KMnO_4$.

Explain: 'Hydrogen attached to a carbon having a triple bond is acidic in nature.' Also,write an appropriate reaction for it.

Reactant $P$ (an alkyne) gives products $Q$ (trans-alkene) or $R$ (cis-alkene).
The possible reagents are:
$(I) \ 2Na/liq. NH_3$
$(II) \ H_2/Pd/CaCO_3$ (quinoline)
$(III) \ 2H_2/Pd/C$
Which of the following statements is/are correct with respect to the above conversion?

Which one is the correct order of acidity?

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