Which of the following is organometallic compound

Options

A. `CH_(3)MgBr`
B. `(CH_(3)COO)_(2)Pb`
C. `CH_(3)COONa`
D. All of these

Explanation

To determine which of the given compounds is an organometallic compound, we need to understand the definition of organometallic compounds. An organometallic compound is characterized by the presence of a direct bond between a metal and a carbon atom.

### Step-by-Step Solution:

1. **Understand the Definition of Organometallic Compounds**:
- Organometallic compounds contain a direct bond between a metal and a carbon atom.

2. **Examine the Given Options**:
- We will analyze each option to see if it contains a direct bond between a metal and carbon.

3. **Option A: CH3MgBr (Methyl Magnesium Bromide)**:
- This compound consists of a carbon (from the CH3 group) bonded directly to magnesium (Mg).
- Therefore, this compound has a direct metal-carbon bond, making it an organometallic compound.

4. **Option B: Lead Acetate (CH3COO)2Pb**:
- In lead acetate, the bonding is between lead (Pb) and the acetate ion (CH3COO-), which involves oxygen, not carbon.
- There is no direct bond between lead and carbon, so this is not an organometallic compound.

5. **Option C: Sodium Acetate (CH3COONa)**:
- Similar to lead acetate, sodium acetate has sodium (Na) bonded to the acetate ion (CH3COO-).
- Again, there is no direct bond between sodium and carbon, so this is also not an organometallic compound.

6. **Conclusion**:
- Based on the analysis, the only organometallic compound among the options is **Option A: CH3MgBr**.

### Final Answer:
The correct answer is **A: CH3MgBr (Methyl Magnesium Bromide)**.