`CH_(3) - overset(O)overset(||)C - H + CH_(3) = CH_(2) - Cl underset("heat")overset(PPH_(3)//LiCl)rarr 'X' , X` will be

Options

A.
B.
C. `CH_(3) - CH - O - CH_(3)`
D. `CH_(3)= overset(OH)overset(|)C - CH_(3) - CH_(3)`

Explanation

To solve the given question, we need to analyze the reaction step-by-step. The reaction involves acetaldehyde (CH₃CHO) reacting with vinyl chloride (CH₂=CHCl) in the presence of a reducing agent (PPh₃) and heat.

### Step-by-Step Solution:

1. **Identify the Reactants**:
- We have acetaldehyde: CH₃CHO
- We have vinyl chloride: CH₂=CHCl

2. **Recognize the Reaction Type**:
- The reaction is a nucleophilic addition where the carbonyl carbon of acetaldehyde acts as an electrophile and the double bond of vinyl chloride acts as a nucleophile.

3. **Nucleophilic Attack**:
- The nucleophile (vinyl chloride) attacks the electrophilic carbonyl carbon of acetaldehyde. This leads to the formation of a tetrahedral intermediate.

4. **Formation of the Intermediate**:
- The tetrahedral intermediate can be represented as:
\[ CH₃C(OH)(CH₂=CHCl) \]
- Here, the chlorine atom (Cl) is a good leaving group, and it will leave the intermediate.

5. **Elimination of Chlorine**:
- The leaving of Cl⁻ will lead to the formation of an alkene. The resulting compound after the elimination of Cl will be:
\[ CH₃C(CH₂=CH)O \]

6. **Reduction with PPh₃**:
- The presence of PPh₃ indicates that we will reduce the carbonyl group (C=O) to an alcohol (C-OH). Thus, we will convert the carbonyl to an alcohol:
\[ CH₃C(CH₂=CH)OH \]

7. **Tautomerization**:
- The alcohol can undergo tautomerization, where the hydrogen from the alcohol group can shift to the adjacent carbon, resulting in the formation of an enol:
\[ CH₂=CHC(OH)CH₃ \]

8. **Final Product**:
- The final product 'X' can be represented as:
\[ CH₂=CHC(OH)CH₃ \]
- This compound is 3-buten-2-ol.

### Conclusion:
The product 'X' formed from the reaction is 3-buten-2-ol.