Coupling reactions with vinyl halides are stereospecific.Which choice below best describes the expected product when trans-1-bromo-1-hexene reacts with (CH₃)₂CuLi?

Question

Quizplus · Accepted Answer

When coupling reactions with vinyl halides occur, they typically follow the stereospecific rules of syn-addition, meaning that the new substituents are added to the same side of the molecule. In this case, trans-1-bromo-1-hexene has a trans double bond, meaning that the two substituents on each carbon are on opposite sides. When the vinyl halide reacts, it will add its two substituents to the same side of the molecule, leading to a trans-alkene. Therefore, the expected product will only yield a trans-alkene.

Coupling Reactions with Vinyl Halides Are Stereospecific