Acetaldehyde reacts with `C_(2) H_(5)`MgBr the final product is

Options

A. An aldehyde
B. A ketone
C. A primary alcohol
D. A secondary Alcohol

Explanation

To solve the problem of what the final product is when acetaldehyde reacts with C2H5MgBr, we can follow these steps:

### Step 1: Identify the Reactants
Acetaldehyde is represented by the formula CH3CHO. The Grignard reagent C2H5MgBr (ethyl magnesium bromide) can be broken down into its components: C2H5 (ethyl group) and MgBr (magnesium bromide).

**Hint:** Remember that Grignard reagents are nucleophiles and will react with electrophiles, such as carbonyl compounds.

### Step 2: Understand the Reaction Mechanism
In this reaction, the nucleophilic ethyl group (C2H5) from the Grignard reagent will attack the electrophilic carbon atom in the carbonyl group of acetaldehyde. The carbonyl carbon is electrophilic due to the partial positive charge created by the electronegativity of the oxygen atom.

**Hint:** Look for the electrophilic center in the carbonyl group where the nucleophile will attack.

### Step 3: Form the Intermediate Product
When the ethyl group attacks the carbonyl carbon, the double bond between carbon and oxygen breaks, leading to the formation of a tetrahedral intermediate. The intermediate can be represented as:
- CH3-C(OH)(C2H5)-MgBr

This shows that the carbon now has an -OH group and is bonded to both the methyl group (from acetaldehyde) and the ethyl group (from the Grignard reagent).

**Hint:** Draw the structure of the intermediate to visualize the changes occurring in the molecule.

### Step 4: Hydrolysis of the Intermediate
The next step involves hydrolysis, where the reaction is treated with water (or an aqueous solution). During hydrolysis, the magnesium bromide part will be replaced by an -OH group, resulting in the formation of an alcohol.

The hydrolysis will yield:
- CH3-CH(OH)-C2H5

This product is a secondary alcohol because the carbon with the -OH group is attached to two other carbon atoms.

**Hint:** Hydrolysis typically converts the Grignard reagent's bond to an -OH group, forming an alcohol.

### Step 5: Identify the Final Product
The final product formed from the reaction of acetaldehyde with C2H5MgBr after hydrolysis is 2-butanol (CH3-CH(OH)-C2H5), which is a secondary alcohol.

**Hint:** Classify the alcohol based on the number of carbon atoms attached to the carbon bearing the -OH group.

### Conclusion
The final product of the reaction between acetaldehyde and C2H5MgBr is a secondary alcohol, specifically 2-butanol.

**Final Answer:** 2-butanol (a secondary alcohol).