Which of the following is not an organometallic compound ?

Options

A. Zeise's salt
B. TEL
C. Sodium ethoxide
D. Ferrocene

Answer

To determine which of the following compounds is not an organometallic compound, we first need to understand what an organometallic compound is. Organometallic compounds are characterized by the presence of a bond between a metal and a carbon atom. This bond can be a sigma bond, a pi bond, or both.

### Step-by-Step Solution:

1. **Identify the Compounds**: List the compounds given in the question. For example, let's say the options are:
- A) J-salt (K[PtCl3(C2H4)])
- B) TEL (Tetraethyl Lead, Pb(C2H5)4)
- C) Sodium Ethoxide (C2H5ONa)
- D) Ferrocene (Fe(C5H5)2)

2. **Analyze Each Compound**:
- **J-salt (K[PtCl3(C2H4)])**:
- This compound contains a platinum (Pt) atom bonded to an ethylene (C2H4) group. The bond between Pt and C2H4 involves a pi bond, making it an organometallic compound.

- **TEL (Tetraethyl Lead, Pb(C2H5)4)**:
- In this compound, lead (Pb) is bonded to four ethyl groups (C2H5). The bonds between Pb and carbon are sigma bonds, confirming that this is also an organometallic compound.

- **Sodium Ethoxide (C2H5ONa)**:
- This compound consists of sodium (Na) and ethoxide (C2H5O). The bond between sodium and carbon is not present; instead, it is an ionic bond between sodium and oxygen. Therefore, this compound does not contain a metal-carbon bond and is not an organometallic compound.

- **Ferrocene (Fe(C5H5)2)**:
- Ferrocene consists of iron (Fe) bonded to two cyclopentadienyl (C5H5) ligands. The bonds between iron and carbon are present, making it an organometallic compound.

3. **Conclusion**: From the analysis, Sodium Ethoxide (C2H5ONa) is the only compound that does not contain a metal-carbon bond, thus it is not an organometallic compound.

### Final Answer:
**C) Sodium Ethoxide (C2H5ONa)** is not an organometallic compound.