Which of the following is not organometallic complex ?

Options

A. Grignard reagent
B. Ferrocene
C. Trans-platin
D. Diethyl zinc

Answer

To determine which of the following is not an organometallic complex, we need to understand the definition of organometallic compounds. Organometallic complexes are defined as compounds that contain at least one direct bond between a metal and a carbon atom.

Let's analyze the given options:

1. **Grignard Reagent (R-Mg-X)**:
- A Grignard reagent is represented as R-Mg-X, where R is an alkyl or aryl group.
- For example, if R is CH3 (methyl), the structure would be CH3-Mg-X.
- Here, there is a direct bond between carbon (from CH3) and magnesium (Mg).
- Therefore, Grignard reagent is an organometallic complex.

2. **Ferrocene**:
- Ferrocene is a well-known organometallic compound consisting of a sandwich structure with iron (Fe) between two cyclopentadienyl (Cp) anions.
- This structure has direct metal-carbon bonds (Fe-C).
- Hence, ferrocene is also an organometallic complex.

3. **Transplatin**:
- Transplatin is a compound that is often compared to cisplatin, which is used in chemotherapy.
- Transplatin does not contain a direct bond between a metal and carbon.
- Instead, it is primarily a coordination compound that does not fit the definition of organometallic complexes.
- Therefore, transplatin is not an organometallic complex.

4. **Diethyl Zinc (Et2Zn)**:
- Diethyl zinc consists of two ethyl groups (Et) bonded to zinc (Zn).
- The structure can be represented as Et-Zn-Et, where there are direct bonds between carbon (from the ethyl groups) and zinc.
- Thus, diethyl zinc is an organometallic complex.

Based on the analysis, the answer is:

**Transplatin is not an organometallic complex.**