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  4. 2-Hexyne gives trans-2-hexene on treatment with

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Q. $2$-Hexyne gives trans-$2$-hexene on treatment with

IIT JEEIIT JEE 2004Hydrocarbons

Solution:

Alkynes on treatment with alkali metals in liquid ammonia gives trans hydrogenation product:
$ CH_3 - C \equiv \underset{2-\text{hexyne}}{C - CH_2 -CH_2} -CH_3 \xrightarrow{ Li/NH_3} $

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