Question #470b6
1 Answer
It depends on the nature of the alkyne.
Explanation:
The usual procedure doesn't work with alkynes, but you can modify the conditions.
The modified conditions
You use catalytic amounts of
Reaction with internal alkynes
Internal alkynes give α-diketones.
Reaction with terminal alkynes
Terminal alkynes give a carboxylic acid with one less carbon atom.
In each case, the reaction is behaving as if it forms a 1,1,2,2-tetraol (the diketone dihydrate), which then loses water in the usual way.