`2 : 4` dinitrophenylhybrazine is an example for

Options

A. tridentate ligand
B. monodentete ligand
C. polydentate ligand
D. didentate ligand

Explanation

To solve the question regarding 2,4-Dinitrophenylhydrazine and its classification, we will follow these steps:

### Step-by-Step Solution:

1. **Understanding the Compound**:
- 2,4-Dinitrophenylhydrazine is a chemical compound that contains a phenyl group attached to a hydrazine moiety with two nitro groups at the 2nd and 4th positions of the benzene ring.

2. **Drawing the Structure**:
- Draw the benzene ring and label the positions. The structure includes:
- A benzene ring (C6H4)
- An NH2 group (hydrazine) attached to the benzene
- Two NO2 groups (nitro groups) at the 2nd and 4th positions of the benzene ring.

3. **Identifying the Coordination Sites**:
- In coordination chemistry, the coordination site is where the ligand can donate a pair of electrons to a metal ion.
- In 2,4-Dinitrophenylhydrazine, the nitrogen atom in the NH2 group has a lone pair of electrons that can be donated.

4. **Determining Denticity**:
- Denticity refers to the number of donor atoms in a ligand that can coordinate to a central metal atom.
- Since there is only one nitrogen atom available for coordination in this ligand, it can only form one bond with a metal ion.

5. **Conclusion**:
- Since 2,4-Dinitrophenylhydrazine has only one coordinating site, it is classified as a **monodentate ligand**.

### Final Answer:
2,4-Dinitrophenylhydrazine is an example of a **monodentate ligand**.

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