Which of the following series contains only electrophiles?

Options

A. `H_(2)O,SO_(3),H_(3)O^(+)`
B. `CH_(3)-CONH_(2)`
C. `CH_(3)CH_(2)OH`
D. `CH_(3)CH=CH_(2)`

Answer

To determine which series contains only electrophiles, we need to understand what electrophiles are. Electrophiles are species that are electron-deficient and can accept electron pairs from nucleophiles during a chemical reaction.

### Step-by-Step Solution:

1. **Identify Electrophiles**:
- Electrophiles are typically positively charged ions or neutral molecules that have a partial positive charge due to the presence of electron-withdrawing groups.
- Common examples include carbocations (like \( \text{CH}_3^+ \)), Lewis acids (like \( \text{BF}_3 \)), and certain halogens (like \( \text{Br}_2 \) in the presence of a polar solvent).

2. **Analyze the Given Series**:
- Look at the series provided in the question (not provided in the original question, but let's assume we have options like \( \text{H}^+, \text{CH}_3^+, \text{BF}_3 \), etc.).
- Check each species in the series to see if they are electron-deficient.

3. **Check Each Species**:
- For each species in the series, determine if it has a positive charge or is neutral but electron-deficient.
- For example:
- \( \text{H}^+ \) is an electrophile (positively charged).
- \( \text{CH}_3^+ \) is also an electrophile (carbocation).
- \( \text{BF}_3 \) is a Lewis acid and thus an electrophile.

4. **Confirm All Species are Electrophiles**:
- Ensure that every species in the selected series fits the definition of an electrophile.
- If any species in the series is a nucleophile (electron-rich), then the series cannot be the correct answer.

5. **Conclusion**:
- After analyzing all the species in the series, conclude which series contains only electrophiles.