MHT CET 2025 Chemistry question

When tert butyl bromide is heated with silver fluoride the major product obtained is

(A)1-Fluoro-2-methylpropane
(B)2-Fluoro-2-methylpropaneCorrect
(C)1-Flurobutane
(D)2-Flurobutane

Answer: (B)

Solution

Alkyl fluorides are prepared by heating an alkyl bromide or chloride with a metal fluoride such as AgF (the Swarts reaction), a halogen-exchange nucleophilic substitution: \mathrm{(CH_3)_3C{-}Br + AgF \to (CH_3)_3C{-}F + AgBr}. The fluorine replaces bromine at the same carbon, so

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Question ID VK-100578