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Which of the following reaction does not takes place

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${CH}_{3} - C \equiv C - {CH}_{3} \overset{Li in liq . {NH}_{3}}{\to}$ Question Image

${CH}_{3} - C \equiv C - {CH}_{3} + H_{2} \overset{P - 2 Catalyst ({Ni}_{2} B)}{\to}$ Question Image

${CH}_{3} - C \equiv CH \overset{Li in liq . {NH}_{3}}{\to} {CH}_{3} - CH = {CH}_{2}$

${CH}_{3} - C \equiv C - C H_{3} \to_{2) {CH}_{3} - COOH}^{1) {Sia}_{2} BH / THF}$ Question Image

answer is B.

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Detailed Solution

1-Alkyne reacts with Li as follows:
${CH}_{3} - C \equiv CH \overset{Liq . {NH}_{3}}{\to} {CH}_{3} - C \equiv CLi + 1 / 2 H_{2}$

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