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Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give: [2020]
- a)Tert. butyl alcohol
- b)Isobutyl alcohol
- c)Isopropyl alcohol
- d)Sec. butyl alcohol
Correct answer is option 'A'. Can you explain this answer?
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Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give tert-butyl alcohol.
The reaction between acetone and methylmagnesium chloride is a Grignard reaction. Grignard reactions involve the addition of an organomagnesium reagent (in this case, methylmagnesium chloride) to a carbonyl compound (acetone) to form an alcohol.
The reaction occurs in two steps:
1. Addition of the Grignard reagent: The methylmagnesium chloride (CH3MgCl) acts as a nucleophile and attacks the carbon of the carbonyl group in acetone. This leads to the formation of a magnesium alkoxide intermediate. In this case, the methyl group from the Grignard reagent adds to the carbonyl carbon of acetone, resulting in the formation of a tertiary alcohol intermediate.
2. Hydrolysis: The alkoxide intermediate is then hydrolyzed by adding a source of water. This step converts the alkoxide back into an alcohol. In this case, the alkoxide intermediate formed from acetone and methylmagnesium chloride is hydrolyzed to give tert-butyl alcohol.
The reaction can be summarized as follows:
Acetone + Methylmagnesium chloride → Magnesium alkoxide intermediate
Magnesium alkoxide intermediate + Water → Tert-butyl alcohol
Therefore, the correct answer is option 'A' - tert-butyl alcohol.
The reaction between acetone and methylmagnesium chloride is a Grignard reaction. Grignard reactions involve the addition of an organomagnesium reagent (in this case, methylmagnesium chloride) to a carbonyl compound (acetone) to form an alcohol.
The reaction occurs in two steps:
1. Addition of the Grignard reagent: The methylmagnesium chloride (CH3MgCl) acts as a nucleophile and attacks the carbon of the carbonyl group in acetone. This leads to the formation of a magnesium alkoxide intermediate. In this case, the methyl group from the Grignard reagent adds to the carbonyl carbon of acetone, resulting in the formation of a tertiary alcohol intermediate.
2. Hydrolysis: The alkoxide intermediate is then hydrolyzed by adding a source of water. This step converts the alkoxide back into an alcohol. In this case, the alkoxide intermediate formed from acetone and methylmagnesium chloride is hydrolyzed to give tert-butyl alcohol.
The reaction can be summarized as follows:
Acetone + Methylmagnesium chloride → Magnesium alkoxide intermediate
Magnesium alkoxide intermediate + Water → Tert-butyl alcohol
Therefore, the correct answer is option 'A' - tert-butyl alcohol.
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Reaction between acetone and methylmagnesium chloride followed by hydrolysis will give: [2020]a)Tert. butyl alcoholb)Isobutyl alcoholc)Isopropyl alcohold)Sec. butyl alcoholCorrect answer is option 'A'. Can you explain this answer?
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