Which of the following compounds does not form an ozonide?

Options

A. Ethane
B. Propyne
C. Propene
D. Ethene

Answer

To determine which of the following compounds does not form an ozonide, we need to understand the nature of ozonide formation. Ozonides are formed from unsaturated compounds when they react with ozone (O3). Saturated compounds, on the other hand, do not form ozonides.

### Step-by-Step Solution:

1. **Identify the Type of Compounds**:
- We need to analyze the compounds given in the options. The key is to identify whether they are saturated or unsaturated.
- Saturated compounds contain only single bonds (alkanes), while unsaturated compounds contain double or triple bonds (alkenes and alkynes).

2. **Evaluate Each Compound**:
- **Ethane (C2H6)**: This is a saturated compound (only single bonds). Therefore, it does not form an ozonide.
- **Propyne (C3H4)**: This is an unsaturated compound (contains a triple bond). It can react with ozone to form an ozonide.
- **Propene (C3H6)**: This is also an unsaturated compound (contains a double bond). It can react with ozone to form an ozonide.
- **Ethylene (C2H4)**: This is another unsaturated compound (contains a double bond). It can react with ozone to form an ozonide.

3. **Conclusion**:
- Among the given options, only ethane is a saturated compound and does not form an ozonide. The other compounds (propyne, propene, and ethylene) are unsaturated and can form ozonides.

### Final Answer:
The compound that does not form an ozonide is **Ethane (C2H6)**.

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