Which of the following molecule has highest E.N. of Xe ?

Options

A. `XeF_(2)`
B. `XeF_(4)`
C. `XeO_(3)`
D. None of these

Answer

To determine which molecule has the highest electronegativity (E.N.) of xenon (Xe), we will analyze the structures and hybridizations of the given molecules: XeF2, XeF4, and XeO3.

### Step-by-Step Solution:

1. **Identify the Molecules**: We have three molecules to analyze: XeF2, XeF4, and XeO3.

2. **Draw the Lewis Structures**:
- **XeF2**: Xenon is the central atom with two fluorine atoms bonded to it. There are three lone pairs on xenon.
- **XeF4**: Xenon is the central atom with four fluorine atoms bonded to it. There are two lone pairs on xenon.
- **XeO3**: Xenon is the central atom with three oxygen atoms bonded to it. One of the oxygen atoms forms a double bond with xenon, and there is one lone pair on xenon.

3. **Determine the Hybridization**:
- **XeF2**: The hybridization is sp³d (5 regions of electron density: 2 bond pairs and 3 lone pairs).
- **XeF4**: The hybridization is sp³d² (6 regions of electron density: 4 bond pairs and 2 lone pairs).
- **XeO3**: The hybridization is sp³ (4 regions of electron density: 3 bond pairs and 1 lone pair).

4. **Calculate the Percent S Character**:
- For **XeF2**:
\[ \text{Percent S character} = \left(\frac{1}{5}\right) \times 100 = 20\% \]
- For **XeF4**:
\[ \text{Percent S character} = \left(\frac{1}{6}\right) \times 100 \approx 16.67\% \]
- For **XeO3**:
\[ \text{Percent S character} = \left(\frac{1}{4}\right) \times 100 = 25\% \]

5. **Relate Percent S Character to Electronegativity**:
- Electronegativity is directly related to the percent S character. The higher the percent S character, the higher the electronegativity of the central atom.

6. **Compare the Percent S Characters**:
- XeF2: 20%
- XeF4: 16.67%
- XeO3: 25%

7. **Conclusion**:
- Since XeO3 has the highest percent S character (25%), it has the highest electronegativity of xenon among the three molecules.

### Final Answer:
The molecule with the highest electronegativity of xenon (Xe) is **XeO3**.

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