Molecule having maximum number of dative bonds is

Options

A. `H_2O_2`
B. `NH_4^(+)`
C. `Al_2Cl_6`
D. `B_3N_3H_6`

Explanation

To determine the molecule with the maximum number of dative bonds, we will analyze the given options step by step.

### Step 1: Understand Dative Bonds
Dative bonds, also known as coordinate bonds, occur when one atom donates both electrons to form a bond with another atom. In contrast, covalent bonds involve the sharing of electrons where both atoms contribute.

### Step 2: Analyze Each Option
1. **S2 (Sulfur Dioxide)**
- Sulfur dioxide has covalent bonds between sulfur and oxygen.
- **Dative Bonds = 0**

2. **NH4+ (Ammonium Ion)**
- In NH4+, nitrogen has a lone pair that it donates to a hydrogen ion (H+).
- This results in one dative bond.
- **Dative Bonds = 1**

3. **Al2Cl6 (Aluminum Chloride Dimer)**
- In Al2Cl6, each chlorine atom donates a lone pair to the vacant orbitals of aluminum.
- Each aluminum atom can accept lone pairs from three chlorine atoms, leading to two dative bonds in total (one from each of the two aluminum atoms).
- **Dative Bonds = 2**

4. **B3N3H6 (Inorganic Benzene)**
- In B3N3H6, nitrogen donates its lone pair to boron, which has vacant orbitals.
- Each nitrogen atom donates a lone pair to boron, leading to three dative bonds in total (one from each of the three nitrogen atoms).
- **Dative Bonds = 3**

### Step 3: Compare the Number of Dative Bonds
- S2: 0 dative bonds
- NH4+: 1 dative bond
- Al2Cl6: 2 dative bonds
- B3N3H6: 3 dative bonds

### Conclusion
The molecule with the maximum number of dative bonds is **B3N3H6 (Inorganic Benzene)**, which has **3 dative bonds**.

---