Carbocations, continued methyl migration

Having participated, the methyl group continues to migrate to carbon 1 because by doing so it allows the formation of a stable tertiary carbocation, which then captures water in a step reminiscent of the second half of an S l reaction. 

As the methyl group migrated in part (b), the hydrogen migrates here, forming the more stcible 3 carbocation. This migration is called a 1,2-hydride shift. We now continue as in part (b) and obtain the expected products ... 

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