Which of the following is an organometallic compound ?

Options

A. Lithium methoxide
B. Lithium acetate
C. Lithium dimethylamide
D. Methyllithium.

Explanation

To determine which of the given options is an organometallic compound, we first need to understand the definition of an organometallic compound. An organometallic compound is characterized by the presence of a metal atom that is directly bonded to a carbon atom.

Let's analyze each option step by step:

1. **Lithium Methoxide (CH3O Li+)**:
- In this compound, lithium (Li) is bonded to an oxygen atom (O), which is then bonded to a carbon atom (C). Since the metal (Li) is not directly bonded to the carbon atom, this is **not** an organometallic compound.

2. **Lithium Acetate (CH3C(=O)O Li+)**:
- Here, lithium is bonded to the oxygen atom of the acetate group. Again, the metal (Li) is not directly bonded to the carbon atom; instead, it is linked to oxygen. Therefore, this is also **not** an organometallic compound.

3. **Lithium Dimethyl Amide (CH3)2N Li**:
- In this case, lithium is bonded to a nitrogen atom (N), which is then bonded to carbon atoms. Since the metal (Li) is not directly bonded to carbon, this compound is **not** an organometallic compound.

4. **Methyl Lithium (CH3Li)**:
- In methyl lithium, lithium is directly bonded to a carbon atom (C). This satisfies the definition of an organometallic compound, as the metal (Li) is directly linked to the carbon atom. Thus, this is an organometallic compound.

Based on the analysis above, the correct answer is **Methyl Lithium (CH3Li)**.

### Summary of Steps:
1. Define organometallic compounds as those with a metal directly bonded to carbon.
2. Analyze each option to check if the metal is directly bonded to carbon.
3. Conclude that Methyl Lithium is the only organometallic compound among the options.