The compound obtained by the hydrolysis of the adduct formed by the reaction of ethyl magnesium bromide and acetadehyde is :

Options

A. Propanol
B. 2-methyl-1-Propanol
C. 2-Butanol
D. 2-methyl-2-butanol

Answer

To solve the problem, we need to determine the compound obtained by the hydrolysis of the adduct formed by the reaction of ethyl magnesium bromide (C2H5MgBr) and acetaldehyde (CH3CHO). Here's a step-by-step breakdown of the process:

### Step 1: Identify the Reactants
The reactants involved are:
- Ethyl magnesium bromide (C2H5MgBr), which is a Grignard reagent.
- Acetaldehyde (CH3CHO).

### Step 2: Understand the Reaction Mechanism
In this reaction, the Grignard reagent acts as a nucleophile. The ethyl group (C2H5) from the Grignard reagent will attack the carbonyl carbon of acetaldehyde.

### Step 3: Form the Adduct
When the nucleophile attacks, it forms an alkoxide intermediate. The reaction can be represented as follows:
- C2H5MgBr + CH3CHO → C2H5-CH(OH)-CH3 + MgBr(OH)

Here, the ethyl group attaches to the carbonyl carbon of acetaldehyde, resulting in the formation of a tetrahedral alkoxide intermediate.

### Step 4: Hydrolysis of the Adduct
The next step involves hydrolysis of the alkoxide intermediate. When we add water (H2O) or an acid (H3O+), the alkoxide will be converted into an alcohol:
- C2H5-CH(OH)-CH3 + H2O → C2H5-CH(OH)-CH3 (butanol)

### Step 5: Identify the Final Product
The resulting compound after hydrolysis is 2-butanol (butan-2-ol). This compound has four carbon atoms with a hydroxyl group (-OH) on the second carbon.

### Conclusion
The compound obtained by the hydrolysis of the adduct formed by the reaction of ethyl magnesium bromide and acetaldehyde is **2-butanol**.

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