Di-tert butyl ether cannot be made by Williamson’s synthesis. Explain why ?

Di-tert butyl ether cannot be made by Williamson’s synthesis. Explain why ?
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Answer :

Ans. To prepare di tert-butyl ether by Williamson’s synthesis, we need tert-butyl bromide and Sodium tertiary butoxide. Since tert-butyl bromide being 3°-alkyl halide prefers to undergo elimination rather than substitution, therefore the product obtained is isobutylene rather than ditertiary butyl ether.
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