What is the major product of the following reaction ?
`CH_(3)-C -= N underset(Et_(2)O)overset(CH_(3)MgI)rarr overset(H_(3)O^(o+))rarr`

Options

A. `CH_(3)-CH_(2)-NH-CH_(3)`
B.
C. `CH_(3)-overset(O)overset(||)(C)-CH_(3)`
D. `CH_(3)-CH_(2)-overset(O)overset(||)(C)-OH`

Explanation

To determine the major product of the reaction given in the question, we will follow these steps:

### Step 1: Identify the Reactants
The reactants in the reaction are:
- Ethane nitrile (CH₃-C≡N)
- Grignard reagent (CH₃MgI)

### Step 2: Understand the Reaction Mechanism
Grignard reagents are strong nucleophiles. In this case, the nucleophilic carbon from the Grignard reagent (CH₃-) will attack the electrophilic carbon of the nitrile (C≡N). The nitrile group (C≡N) is more electronegative, making the carbon atom in the nitrile susceptible to nucleophilic attack.

### Step 3: Nucleophilic Addition
The nucleophilic attack will lead to the formation of an intermediate. The reaction can be represented as follows:

1. The nucleophilic carbon (from CH₃-) attacks the carbon of the nitrile (C≡N).
2. This results in the formation of a new carbon-carbon bond and the conversion of the triple bond (C≡N) to a double bond (C=N).

The intermediate formed will be:
- CH₃-C(=N)-CH₃ (which is an imine intermediate).

### Step 4: Hydrolysis of the Intermediate
The next step involves hydrolysis of the imine intermediate. When treated with H₃O⁺ (acidic conditions), the imine will be hydrolyzed to form a ketone. The hydrolysis can be represented as follows:

1. The imine (CH₃-C(=N)-CH₃) will react with water (H₂O) in the presence of H₃O⁺.
2. This leads to the formation of acetone (CH₃-C(=O)-CH₃) and the release of ammonia (NH₃).

### Step 5: Identify the Major Product
The major product of the reaction after hydrolysis is acetone (CH₃-C(=O)-CH₃).

### Final Answer
The major product of the reaction is **acetone (CH₃-C(=O)-CH₃)**.

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