Identify X and Y in the following reaction
`BCl_(3) + NH_(4) Cl underset(C_(6)H_(5)Cl)overset(140^(@)C)(to) X overset(NaBH_(4))(to) Y`

Options

A. `X = NaBO_(2), Y = B_(2) O_(3)`
B. `X = N_(2)B_(4)O_(7), Y = H_(3) BO_(3)`
C. `X = BN, Y = [NH_(4)]^(+) [BCI_(4)]^(-)`
D. `X = B_(3)N_(3)H_(3)CI_(3), Y = B_(3)N_(3)H_(6)`

Explanation

To identify the compounds X and Y in the given reaction sequence, let's break down the reaction step by step:

### Step 1: Identify the Reactants
The reaction starts with:
- **BCl₃** (Boron trichloride)
- **NH₄Cl** (Ammonium chloride)
- The reaction is conducted in the presence of **C₆H₅Cl** (Chlorobenzene) at a temperature of **140°C**.

### Step 2: Determine the Intermediate Product (X)
When boron trichloride reacts with ammonium chloride, it forms an intermediate compound. The reaction can be summarized as follows:
- **BCl₃ + NH₄Cl → B₃N₃H₃Cl₃** (This is the intermediate product)

This compound, B₃N₃H₃Cl₃, is known as **boron nitride trichloride**. Thus, we can identify:
- **X = B₃N₃H₃Cl₃**

### Step 3: Determine the Final Product (Y)
The next step involves the reduction of the intermediate (X) using sodium borohydride (NaBH₄):
- **B₃N₃H₃Cl₃ + NaBH₄ → B₃N₃H₆** (This is the final product)

The compound B₃N₃H₆ is known as **borazine**, which is often referred to as "inorganic benzene" due to its similar structure to benzene. Thus, we can identify:
- **Y = B₃N₃H₆**

### Conclusion
Based on the above steps, we have identified:
- **X = B₃N₃H₃Cl₃**
- **Y = B₃N₃H₆**