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 will follow these steps:

### Step 1: Identify the reactants
The reactants in this case are ethyl magnesium bromide (C2H5MgBr) and acetaldehyde (CH3CHO).

### Step 2: Understand the reaction
Ethyl magnesium bromide is a Grignard reagent, which acts as a nucleophile. It will attack the electrophilic carbon in the carbonyl group of acetaldehyde.

### Step 3: Draw the reaction mechanism
1. The nucleophile (C2H5-) attacks the carbonyl carbon of acetaldehyde (CH3CHO).
2. This leads to the formation of a tetrahedral intermediate, which has a negatively charged oxygen (alkoxide).

### Step 4: Write the structure of the adduct
The adduct formed after the nucleophilic attack can be represented as:
- CH3-CH(OH)-C2H5 (with a negative charge on the oxygen).

### Step 5: Hydrolysis of the adduct
Upon hydrolysis, the adduct reacts with water (H2O):
1. The negatively charged oxygen (O-) will bond with a hydrogen ion (H+) from water, forming an alcohol.
2. The magnesium bromide part will dissociate, leading to the formation of magnesium hydroxide (Mg(OH)Br).

### Step 6: Identify the final product
The product of this hydrolysis is 2-butanol (C4H10O), which can be represented as:
- CH3-CH(OH)-CH2-CH3.

### Final Answer
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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