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When 3,3-dimethyl-2-butanol is heated with H2SO4, the major product obtained is:

1. 2,3-dimethyl-2-butene
2. 3,3-dimethyl-1-butene
3. 2,3-dimethyl-1-butene
4. cis & trans isomers of 2,3-dimethyl-2-butene

Correct answer: 2,3-dimethyl-2-butene

Solution

When 3,3-dimethyl-2-butanol is heated with H2SO4, dehydration occurs, leading to the formation of the most stable alkene. The major product is 2,3-dimethyl-2-butene due to its higher stability from hyperconjugation and alkyl substitution.

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