Identify the correct statement about borazene, `B_(3)N_(3)H_(6)`.
(i) Borazene is aromatic
(ii) There are four isomers of bi substituted molecule of borazene molecules, `(B_(3)N_(3)H_(4)X_(2))`.
(iii) Borazene is more reactive towards addition reactions that benzene.

Options

A. only (i)
B. (i) and (ii)
C. (i) and (iii)
D. (i),(ii) and (iii)

Answer

To solve the question regarding borazine, \( B_3N_3H_6 \), we need to evaluate the three statements provided and determine which ones are correct.

### Step 1: Evaluate Statement (i)
**Statement (i): Borazene is aromatic.**

- **Analysis**: To determine if borazine is aromatic, we need to check if it meets the criteria for aromaticity:
- It must be cyclic.
- It must be planar.
- It must have a continuous overlap of p-orbitals (conjugated system).
- It must follow Huckel's rule, which states that the compound must have \( 4n + 2 \) π electrons, where \( n \) is a non-negative integer.

- **Structure of Borazine**: The structure of borazine consists of alternating boron (B) and nitrogen (N) atoms in a cyclic arrangement, with hydrogen atoms attached. The molecule has 6 π electrons (from the alternating double bonds), which satisfies Huckel's rule.

- **Conclusion**: Borazine is indeed aromatic.

### Step 2: Evaluate Statement (ii)
**Statement (ii): There are four isomers of bisubstituted molecules of borazine, \( B_3N_3H_4X_2 \).**

- **Analysis**: To find the isomers, we consider the positions where the substituents (X) can be placed on the borazine structure. The possible positions for substitution are:
- 1,2 (ortho)
- 1,3 (meta)
- 1,4 (para)

- **Isomer Structures**:
1. **1,2-isomer**: Substituents on adjacent boron and nitrogen.
2. **1,3-isomer**: Substituents on alternating boron and nitrogen.
3. **1,3-isomer (another form)**: Substituents on different nitrogen atoms.
4. **1,4-isomer**: Substituents on opposite sides of the ring.

- **Conclusion**: There are indeed four isomers of bisubstituted borazine.

### Step 3: Evaluate Statement (iii)
**Statement (iii): Borazine is more reactive towards addition reactions than benzene.**

- **Analysis**: Benzene is known for its stability due to aromaticity, which makes it less reactive in addition reactions. In contrast, borazine has a polar structure due to the electronegativity difference between boron and nitrogen, making it more reactive as it can act as a nucleophile.

- **Conclusion**: Borazine is more reactive towards addition reactions than benzene.

### Final Conclusion
All three statements about borazine are correct:
1. Borazine is aromatic.
2. There are four isomers of bisubstituted borazine.
3. Borazine is more reactive towards addition reactions than benzene.

### Answer: All statements (i), (ii), and (iii) are correct.

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