Ethyl ester reacts with `PrMgBr` to give `2^@` alcohol. The alcohol is :

Options

A.
B.
C.
D.

Explanation

To solve the problem of determining the two-degree alcohol formed when ethyl ester reacts with propyl magnesium bromide (PrMgBr), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**:
- The reactant is ethyl ester, which can be represented as RCOOEt (where R is a hydrogen atom in this case, as we are not given any other substituent).
- The Grignard reagent is propyl magnesium bromide (PrMgBr), which can be represented as C3H7MgBr.

2. **Structure of Ethyl Ester**:
- Ethyl ester can be depicted as CH3CH2C(=O)OEt. For our case, it simplifies to CH3CH2C(=O)O-H (since R is hydrogen).

3. **Reaction with Grignard Reagent**:
- When ethyl ester reacts with PrMgBr, the carbonyl carbon (C=O) of the ester is electrophilic and will react with the nucleophilic propyl group (C3H7).
- The reaction leads to the formation of a tetrahedral intermediate where the oxygen becomes negatively charged.

4. **Formation of Intermediate**:
- The propyl group attacks the carbonyl carbon, resulting in the formation of an intermediate where the ethoxy group (OEt) leaves as a leaving group, forming a new compound:
- R-C(OH)(C3H7)-O-MgBr (where R is hydrogen).

5. **Second Reaction with Grignard Reagent**:
- The intermediate can react again with another equivalent of PrMgBr. The oxygen will again become negatively charged, and the carbon will be positively charged.
- The propyl group will attack the carbon, leading to a new intermediate.

6. **Hydrolysis**:
- Upon hydrolysis (usually with water or dilute acid), the magnesium bromide complex will break down, and we will obtain the final product.
- The final product will be a two-degree alcohol:
- The structure will be C3H7-C(OH)-C3H7 (where the hydroxyl group is attached to a carbon that is bonded to two other carbon atoms).

7. **Identify the Product**:
- The resulting compound is 2-propanol (isopropanol), which is a two-degree alcohol since the carbon with the hydroxyl group is attached to two other carbon atoms.

### Final Answer:
The two-degree alcohol formed is **2-propanol (isopropanol)**.