| 1. | The resonating bond is broken and a carbocation resonating structure results.
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| 2. | Carbocation rearrangement reactions occur through three-center bond transition states.
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| 3. | On occasion, a halonium atom will rearrange to a carbocation.
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| 4. | First, the leaving group is eliminated creating a carbocation.
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| 5. | One explanation relies on the carbocation resonance structure of the Criegee intermediate.
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| 6. | The loss of pyrophosphate forms an allylic carbocation on dimethylallyl.
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| 7. | Further cyclisation occurs yielding the 5 and 7-membered ring carbocation.
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| 8. | This forms a temporary tertiary carbocation, which is a very reactive electrophile.
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| 9. | This strain makes the carbocation unstable enough to cause a carbon to shift.
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| 10. | This forms a carbocation, which is resonance stabilized.
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