How do alkynes react with hypochlorous acids? Discuss its mechanism.
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Both hypochlorous acid HOCl (Cl2 | H2O) and hypobromous acid HOBr (Br2 | H2O) react with alkynes in two steps.
Mechanism: It is an example of electrophilic addition and proceeds in two steps:
Step II. The electrophilic addition is repeated again when the final compound gets formed.