The combination which produces t-butyl alcohol when treated with a Grignard reagent is:

JEE Main Chemistry question

The combination which produces -butyl alcohol when treated with a Grignard reagent is:

(A)CH_3MgBr + CH_3COCH_3Correct
(B)
(C)CH_3MgBr + (CH_3)_2CHOH
(D)CH_3MgBr + (CH_3)_3COH

Answer: (A)

Solution

-Butyl alcohol, , is formed when a methyl Grignard reagent adds to acetone, placing a new methyl group on the carbonyl carbon: (CH_3)_2C=O + CH_3MgBr \rightarrow (CH_3)_3C-OMgBr \xrightarrow{H_2O} (CH_3)_3COH. Using ethylmagnesium bromide (B) with acetone

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Question ID VK-148297