What is the main product when propanal is treated with excess Grignard reagent f

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Question: What is the main product when propanal is treated with excess Grignard reagent followed by hydrolysis?

Options:

Correct Answer: Propan-2-ol

Solution:

The reaction of propanal with excess Grignard reagent followed by hydrolysis yields propan-2-ol.

What is the main product when propanal is treated with excess Grignard reagent followed by hydrolysis?

What is the main product when propanal is treated with excess Grignard reagent followed by hydrolysis?

Correct Answer: propan-2-ol

Step 1: Start with propanal, which is an aldehyde with the formula CH3CH2CHO.
Step 2: Add excess Grignard reagent (like CH3MgBr) to propanal. The Grignard reagent acts as a nucleophile and attacks the carbonyl carbon of propanal.
Step 3: This reaction forms a new compound called an alcoholate intermediate.
Step 4: Since we used excess Grignard reagent, another molecule of Grignard can react with the alcoholate to form a more complex intermediate.
Step 5: Now, we need to perform hydrolysis. This means we add water (H2O) to the reaction mixture.
Step 6: The hydrolysis step converts the alcoholate intermediate into a stable alcohol.
Step 7: The final product after hydrolysis is propan-2-ol, which is a secondary alcohol.

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