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Which of the following reactions will results in 3,3-dimethyl-1-butene?
a. 1-bromo-2,2-dimethylbutane is heated in the presence of potassium tert-butoxide in tert-butanol as a solvent
b. 2,3-dimethyl-butan-2-ol is heated in the presence of sulfuric acid
c. 3-bromo-2,2-dimethylbutane is heated in the presence of potassium tert-butoxide in tert-butanol as a solvent

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Answer:

The answer is C. Look at the picture.

Explanation:

So for variant a no reaction will occur due to the quaternary  carbon wich has no protons attached for elimination.

For variant b you can see that we will obtain different product after alcohol elimination.

For c only the described reaction pass way can occur.

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