Reactions of Alkenes and Alkynes - What are Carbocation Rearrangements?

3 important questions on Reactions of Alkenes and Alkynes - What are Carbocation Rearrangements?

What is meant with a rearrangement?

In a rearrangement a hydrogen or carbon shifts it's connectivity to an other atom.

What is the driving force behind a 1,2-shift?

In a 1,2-shift the carbocation shifts from a secondary position to a tertiary position.

Next to rearrangement in a hydrogenhalide reaction with an alkene, in what other reactions does a rearrangement happen?

In the acid catalyzed hydration of alkenes.

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