Problem: Determine which compound(s) could lead immediately to the alkyne shown below.  

FREE Expert Solution
FREE Expert Solution

We’re being asked to determine the compound that would form the given alkyne.



Recall that alkynes can be formed via double elimination of alkyl dihalides. Double elimination proceeds via two successive E2 reactions.



This means a suitable substrate for double elimination needs two halogens and β-hydrogens.


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Determine which compound(s) could lead immediately to the alkyne shown below.