2-Methychlcyclohexanone is allowed to react with matachloroperbenzoic acid. The major product in the reaction is

Options

A.
B.
C.
D.

Explanation

To solve the question regarding the reaction of 2-methylcyclohexanone with meta-chloroperbenzoic acid, we will follow these steps:

### Step 1: Understand the Reactants
- **2-Methylcyclohexanone**: This compound has a cyclohexane ring with a ketone (C=O) functional group at the second carbon and a methyl (CH₃) group at the same position.
- **Meta-chloroperbenzoic acid (m-CPBA)**: This is a peracid that can introduce an oxygen atom into the carbon skeleton through an epoxidation reaction.

**Hint**: Identify the structure of both reactants to visualize the reaction mechanism.

### Step 2: Reaction Mechanism
- The reaction involves the nucleophilic attack of the carbonyl oxygen of 2-methylcyclohexanone on the electrophilic oxygen of m-CPBA.
- The oxygen in the peracid will act as an electrophile, and the carbonyl oxygen will act as a nucleophile.

**Hint**: Remember that nucleophiles donate electrons to electrophiles in a reaction.

### Step 3: Formation of the Epoxide
- Upon the reaction, an epoxide is formed. The oxygen from m-CPBA will form a three-membered cyclic ether with the carbonyl carbon of 2-methylcyclohexanone.
- This results in the formation of an intermediate with a cyclic structure.

**Hint**: Look for the formation of a three-membered ring (epoxide) in the product.

### Step 4: Ring Opening
- The epoxide can undergo ring-opening in the presence of acid or water, leading to the formation of a hydroxyl group (-OH) on one of the carbons of the original ketone.
- The other carbon will retain the original substituents, including the methyl group.

**Hint**: Consider how the epoxide can be opened and what functional groups will remain in the final product.

### Step 5: Identify the Major Product
- After the ring-opening, the major product will be a 7-membered ring compound with a hydroxyl group and the original methyl group retained.
- The final structure can be named as 7-methyl-oxepan-2-one.

**Hint**: Ensure to check the final structure for the correct number of carbons and functional groups.

### Conclusion
The major product formed from the reaction of 2-methylcyclohexanone with meta-chloroperbenzoic acid is **7-methyl-oxepan-2-one**. Therefore, the correct option is **C**.