Which of the following overlapping is not present in `XeO_(3)` molecule ?

Options

A. `sp^(3)+p_(x)`
B. `sp^(3)+p_(y)`
C. `d_(xy)+p_(x)`
D. `sp^(3)+s`

Answer

To determine which type of overlapping is not present in the `XeO3` molecule, we will analyze the molecular structure and hybridization of xenon in this compound.

### Step-by-Step Solution:

1. **Identify the Central Atom and Its Hybridization**:
- The central atom in `XeO3` is xenon (Xe).
- Xenon is surrounded by three oxygen atoms and has one lone pair of electrons.
- The hybridization of xenon in this case is `sp^3`.

2. **Draw the Orbital Structures**:
- For xenon, the valence shell consists of the `s` orbital, `p` orbitals, and `d` orbitals.
- Before excitation, the `s` orbital is filled, and the `p` orbitals are also filled. After excitation, one of the `p` electrons is unpaired, and the `d` orbitals can be partially filled.

3. **Orbital Structures for Oxygen**:
- Each oxygen atom has a `2s` and `2p` orbital structure.
- There are three oxygen atoms in `XeO3`, so we will consider the orbital structures for all three.

4. **Hybridization and Bond Formation**:
- The hybridization `sp^3` means that one `s` orbital and three `p` orbitals combine to form four equivalent hybrid orbitals.
- The unpaired electrons in the `p` orbitals of xenon will overlap with the `p` orbitals of oxygen to form bonds.

5. **Analyze the Given Overlapping Options**:
- **Option 1: `sp^3 + p_x`**: This overlapping is present as it involves hybrid orbitals.
- **Option 2: `sp^3 + p_y`**: This overlapping is also present for the same reason.
- **Option 3: `d_{xy} + p_x`**: This overlapping can occur as there is a possibility of interaction between `d` and `p` orbitals.
- **Option 4: `sp^3 + s`**: The lone pair in the `s` orbital does not participate in bonding and is considered stereochemically inactive. Therefore, this overlapping is not present.

6. **Conclusion**:
- The overlapping that is not present in the `XeO3` molecule is `sp^3 + s`. Thus, the correct answer is option 4.

### Final Answer:
The overlapping that is not present in `XeO3` is **`sp^3 + s`**.