What is the product when 2-butyne is treated | vedclass

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(C) The reduction of internal alkynes like $2-$butyne with alkali metals (such as $Li$ or $Na$) in liquid $NH_3$ (Birch reduction) proceeds via a radi

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$trans-2-$butene

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(C) The reduction of internal alkynes like $2-$butyne with alkali metals (such as $Li$ or $Na$) in liquid $NH_3$ (Birch reduction) proceeds via a radical anion intermediate. This mechanism favors the formation of the more stable $trans-$alkene isomer due to steric repulsion between the alkyl groups in the transition state. Therefore,the reaction of $2-$butyne with $Li/NH_3$ yields $trans-2-$butene.

What is the product when $2-$butyne is treated with liquid $NH_3$ in the presence of lithium?

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