Acetaldehyde reacts with `CH_3MgBr` and the product on hydrolysis gives

Options

A. acetone
B. ethyl alcohol
C. n-propyl alcohol
D. isopropyl alcohol

Answer

To solve the problem of what product is formed when acetaldehyde reacts with CH₃MgBr and undergoes hydrolysis, we can follow these steps:

### Step 1: Identify the Reactants
Acetaldehyde (CH₃CHO) is an aldehyde, and CH₃MgBr is a Grignard reagent. Grignard reagents are strong nucleophiles that can react with electrophiles, such as carbonyl compounds.

### Step 2: Reaction of Acetaldehyde with Grignard Reagent
When acetaldehyde reacts with CH₃MgBr, the nucleophilic carbon of the Grignard reagent attacks the electrophilic carbon of the carbonyl group in acetaldehyde. This results in the formation of a tetrahedral intermediate.

**Reaction:**
\[ \text{CH}_3CHO + \text{CH}_3MgBr \rightarrow \text{CH}_3C(OH)(CH_3) \]

### Step 3: Formation of Alkoxide Intermediate
The attack of the Grignard reagent leads to the formation of an alkoxide intermediate. The oxygen atom in the carbonyl group becomes negatively charged (alkoxide ion).

### Step 4: Hydrolysis of the Alkoxide
Upon hydrolysis, the alkoxide intermediate reacts with water. The negatively charged oxygen will bond with a hydrogen ion (H⁺) from water, resulting in the formation of an alcohol.

**Hydrolysis Reaction:**
\[ \text{CH}_3C(OH)(CH_3) + \text{H}_2O \rightarrow \text{CH}_3C(OH)(CH_3) + \text{OH}^- \]

### Step 5: Identify the Product
The product formed after hydrolysis is isopropyl alcohol (also known as 2-propanol). The structure of isopropyl alcohol can be represented as follows:

\[ \text{(CH}_3)_2CHOH \]

### Conclusion
Thus, the final product formed when acetaldehyde reacts with CH₃MgBr and is then hydrolyzed is isopropyl alcohol.

### Final Answer
The product on hydrolysis is **isopropyl alcohol**.

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