What are the products expected in the following reactions?
`C_(6)H_(5)-overset(O)overset(||)C-CH_(2)-overset(O)overset(||)C-CH_(3)underset("Ether")overset(CH_(2)N_(2))rarr`

Options

A. `C_(6)H_(5)overset(OCH_(3))overset(|)C=CH-overset(O)overset(||)C-CH_(3)`
B. `C_(6)H_(5)overset(O)overset(||)C-CH=overset(OCH_(3))overset(|)C-CH_(3)`
C.
D.

Answer

To determine the products expected from the reaction of the given compound with diazomethane in the presence of ether, we can follow these steps:

### Step 1: Identify the Reactants
The reactant is a diketone compound represented as:
\[ C_6H_5 - C(=O) - CH_2 - C(=O) - CH_3 \]
This compound has a phenyl group (C6H5), two carbonyl (C=O) groups, and a methylene (CH2) group between them.

### Step 2: Understand the Role of Diazomethane
Diazomethane (CH2N2) acts as a methylating agent. When it is treated with the diketone in ether, it undergoes cleavage to generate a reactive intermediate.

### Step 3: Cleavage of Diazomethane
Upon heating, diazomethane undergoes homolytic cleavage to form a methylene carbocation:
\[ CH_2N_2 \rightarrow CH_2^+ + N_2 \]
This carbocation is a strong electrophile.

### Step 4: Nucleophilic Attack
The methylene carbocation (CH2+) will seek a nucleophile to stabilize itself. In this case, the oxygen atoms from the carbonyl groups (C=O) act as nucleophiles. The nucleophilic attack will occur on one of the carbonyl carbons.

### Step 5: Formation of Products
1. **Product 1**: When the methylene carbocation attacks the first carbonyl group (C=O), it leads to the formation of a new bond, resulting in:
\[ C_6H_5 - C(OH) - CH_2 - C(=O) - CH_3 \]
This product can further rearrange or lose a proton to stabilize.

2. **Product 2**: Alternatively, if the methylene carbocation attacks the second carbonyl group, the product will be:
\[ C_6H_5 - C(=O) - CH_2 - C(OH) - CH_3 \]
Again, this product can undergo rearrangement or proton loss.

### Final Products
The final products of the reaction are:
1. \( C_6H_5 - C(OH) - CH_2 - C(=O) - CH_3 \)
2. \( C_6H_5 - C(=O) - CH_2 - C(OH) - CH_3 \)

### Conclusion
Thus, the expected products from the reaction are:
- Product A: \( C_6H_5 - C(OH) - CH_2 - C(=O) - CH_3 \)
- Product B: \( C_6H_5 - C(=O) - CH_2 - C(OH) - CH_3 \)