Select the best reagent to convert 4,5-dimethylhex-2-yne to trans-4,5-dimethylhex-2-ene. A) 1. OsO₄; 2. NaHSO₃, H₂O B) HBr, ROOR C) NaBr D) Na, NH₃ E) HBr

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The best reagent for converting an alkyne to a trans-alkene is sodium (Na) in liquid ammonia (NH3), which is known as the Birch reduction. This method selectively reduces alkynes to trans-alkenes without further reducing the double bond to an alkane.

Select the Best Reagent to Convert 4,5-Dimethylhex-2-Yne to Trans-4,5-Dimethylhex-2-Ene