2-Phenylcycloprop-2-en-1-one is allowed to react with phenylmagnesium bromide and the reaction mixture is hydrolysed with perchloric acid.The product formed is

Options

A. `Ph-undersetunderset(O)(||)C-undersetunderset(OH)(|)oversetoverset(Ph)(|)C-CHO`
B.
C.
D.

Explanation

To solve the problem of determining the product formed when 2-Phenylcycloprop-2-en-1-one reacts with phenylmagnesium bromide and is subsequently hydrolyzed with perchloric acid, we can follow these steps:

### Step 1: Identify the Reactants
The reactants in this reaction are:
- 2-Phenylcycloprop-2-en-1-one
- Phenylmagnesium bromide (a Grignard reagent)

### Step 2: Understand the Structure of 2-Phenylcycloprop-2-en-1-one
The structure of 2-Phenylcycloprop-2-en-1-one consists of:
- A cyclopropene ring
- A phenyl group attached to the cyclopropene
- A carbonyl group (C=O) indicating the presence of a ketone

### Step 3: Reaction with Phenylmagnesium Bromide
When 2-Phenylcycloprop-2-en-1-one reacts with phenylmagnesium bromide, the nucleophilic carbon (from the Grignard reagent) attacks the electrophilic carbon of the carbonyl group. This leads to the formation of a magnesium alkoxide intermediate (adduct).

### Step 4: Draw the Intermediate Product
The intermediate product can be represented as:
- The carbonyl oxygen now has a negative charge (alkoxide)
- The phenyl group from the Grignard reagent is attached to the carbonyl carbon

### Step 5: Hydrolysis with Perchloric Acid
Upon hydrolysis with perchloric acid (HClO4), the alkoxide intermediate is converted into an alcohol. The perchloric acid facilitates the protonation of the alkoxide, resulting in the formation of a hydroxyl group (-OH).

### Step 6: Final Product Structure
The final product after hydrolysis will have:
- The original cyclopropene structure
- The phenyl group from the Grignard reagent
- A hydroxyl group replacing the alkoxide

### Step 7: Identify the Correct Product
The resulting product is a substituted phenolic compound, specifically:
- A phenol derivative where the hydroxyl group is on the cyclopropene structure.

### Conclusion
The final product formed from the reaction of 2-Phenylcycloprop-2-en-1-one with phenylmagnesium bromide followed by hydrolysis with perchloric acid is a phenolic compound.