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Question

How will you bring the conversion of Methyl Bromide to Acetone?


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Solution

Step 1: Formation of Grignard reagent
Methyl bromide reacts with Magnesium and dry ether, to form Methyl magnesium bromide(Grignard reagent).
CH3BrMethylbromidedryetherMgCH3MgBrMethylmagnesiumbromide


Step 2: Addition of cyanide ions
When Methyl nitrile reacts with Methyl magnesium bromide, it forms an adduct.
CH3MgBrMethylmagnesiumbromideCH3CNCH3C(CH3)NMgBrAdduct


Step 3: Formation of acetone
When the adduct undergoes hydrolysis, acetone is formed.
CH3C(CH3)NMgBrAdductH3O+CH3COCH3Acetone+H2NMgBr


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