Which of the following statement is not correct for a nucleophile ?

Options

A. (a) Nucleophiles attack low `e^(-)` density sites
B. (b) Nucleophiles are not electron seeking
C. (c) Nucleophile is a lewis acid
D. (d) Ammonia is a nucleophile

Explanation

To determine which statement is not correct for a nucleophile, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding Nucleophiles**:
- Nucleophiles are species that are rich in electrons. They can either have a negative charge or possess lone pairs of electrons that they can donate to electrophiles (electron-deficient species).

2. **Analyzing Each Option**:
- **Option A**: "Nucleophiles attack low electron density sites."
- This statement is correct. Nucleophiles, being electron-rich, are attracted to areas of low electron density where they can donate their electrons.

- **Option B**: "Nucleophiles are not electron seeking."
- This statement is also correct. Nucleophiles already possess high electron density and do not seek additional electrons; instead, they donate electrons.

- **Option C**: "Nucleophile is a Lewis acid."
- This statement is incorrect. Lewis acids are electron-deficient species that accept electron pairs, while nucleophiles are electron-rich and donate electron pairs. Therefore, nucleophiles are classified as Lewis bases, not Lewis acids.

- **Option D**: "Ammonia is a nucleophile."
- This statement is correct. Ammonia (NH3) has a lone pair of electrons on the nitrogen atom, making it an electron-rich species capable of acting as a nucleophile.

3. **Conclusion**:
- After analyzing all the options, the statement that is not correct for a nucleophile is **Option C: "Nucleophile is a Lewis acid."**

### Final Answer:
**Option C** is the correct answer as it is the statement that is not correct for a nucleophile.

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