Grignard reagent on reaction with hydrogen cyanide followed by hydrolysis will form

Options

A. Aldehydes
B. Ketones
C. Esters
D. Acid Amides

Explanation

To solve the problem of what is formed when a Grignard reagent reacts with hydrogen cyanide followed by hydrolysis, we can break down the process into clear steps:

### Step-by-Step Solution:

1. **Understanding Grignard Reagents**:
- Grignard reagents are organomagnesium compounds represented as RMgX, where R is an organic group (alkyl or aryl) and X is a halogen. The carbon atom in R carries a partial negative charge, making it a nucleophile.

**Hint**: Remember that Grignard reagents act as nucleophiles due to the polar bond between carbon and magnesium.

2. **Reaction with Hydrogen Cyanide (HCN)**:
- When a Grignard reagent (RMgX) reacts with hydrogen cyanide (HCN), the nucleophilic carbon (R) attacks the electrophilic carbon of the cyanide (C≡N). This results in the formation of an intermediate compound.

**Hint**: Look for the nucleophilic attack of R on the carbon of the cyanide group.

3. **Formation of an Intermediate**:
- The reaction can be represented as:
\[ R-MgX + HCN \rightarrow R-CH(NH)C \text{ (intermediate)} \]
- This intermediate has a carbon atom bonded to a nitrogen atom (which has a negative charge).

**Hint**: The intermediate contains a carbon-nitrogen bond and will be unstable due to the negative charge on nitrogen.

4. **Hydrolysis of the Intermediate**:
- Upon hydrolysis, the intermediate reacts with water. The nitrogen atom can abstract a proton from water, leading to the formation of an amine and a hydroxyl group.

**Hint**: Hydrolysis involves the addition of water, which will facilitate the conversion of the intermediate into a more stable product.

5. **Final Product Formation**:
- After hydrolysis, the final product will be an aldehyde (RCHO) and ammonia (NH3) as a byproduct. The reaction can be summarized as:
\[ R-CH(NH2)C + H2O \rightarrow R-CHO + NH3 \]

**Hint**: The final product is an aldehyde, which is characterized by the functional group -CHO.

### Conclusion:
When a Grignard reagent reacts with hydrogen cyanide followed by hydrolysis, the final product formed is an aldehyde (RCHO).

### Final Answer:
The product formed is an aldehyde (RCHO).