Reduction of an alkyne in the presence of sodium metal gives a trans alkene
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Hydrogenation of an Alkyne to a Trans-Alkene. Alkynes can be reduced to trans-alkenes with the use of sodium dissolved in an ammonia solvent. An Na radical donates an electron to one of the P bonds in a carbon-carbon triple bond. This forms an anion, which can be protonated by a hydrogen in an ammonia solvent.
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