Amongst the following the agent that would convert 2-hexyne into trans-2-hexene is:

H_{2} . P t / O_{2}

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H_{2} . P t / S O_{4}^{2 -}

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L i / N H_{3} / C_{2} H_{5} O H

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N a B H_{4}

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Solution

The correct option is C $L i / N H_{3} / C_{2} H_{5} O H$
2-Hexyne can be hydrogenated to form trans-2-Hexene using sodium or lithium metal in ammonia and ethyl alcohol. It is more favorable and yields found in a good amount as it is the stable form than its cis isomer.

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