Organic Chemistry

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10. Addition Reactions

Alkyne Hydrohalogenation

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Alkynes contain two π-bonds, so when they are exposed to electrophiles, they do exactly what you would expect them to do:they react TWICE with them. 

Halogens Add Twice to Alkynes

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General properties of double addition reactions to alkynes.

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Keep in mind that for some of these reactions, vinyl carbocations will be created. While unstable, these cannot rearrage, so don’t worry about carbocation rearrangements when reacting with alkynes!

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Double hydrohalogenation of alkynes.

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General Reaction:

  • Product: gem-dihalides
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