Which of the following statement is correct about ethane 1,2
diamine ?

Options

A. It is a neutral ligand
B. It is a bidentate ligand
C. It is a chelating ligand
D. All of the above

Answer

To determine which statements are correct about ethane-1,2-diamine, we can analyze its structure and properties step by step.

### Step 1: Understand the Structure of Ethane-1,2-diamine
Ethane-1,2-diamine, also known as ethylene diamine, has the following structure:

```
H2N-CH2-CH2-NH2
```

This structure shows that it contains two amine (NH2) groups attached to the ethane backbone.

**Hint:** Look at the molecular structure to identify functional groups and bonding sites.

### Step 2: Determine the Charge of Ethane-1,2-diamine
Ethane-1,2-diamine is a neutral molecule, meaning it has no overall charge. The nitrogen atoms do not carry any formal charge in this structure.

**Hint:** Check for any positive or negative charges on the molecule to determine if it is neutral.

### Step 3: Identify the Type of Ligand
Ethane-1,2-diamine has two nitrogen atoms that can donate electron pairs to a metal ion. This makes it a bidentate ligand, as it can form two bonds with a central metal atom.

**Hint:** Count the number of donor atoms in the ligand to classify it as monodentate or bidentate.

### Step 4: Determine if it is a Chelating Ligand
Since ethane-1,2-diamine can bind to a metal ion through both of its nitrogen atoms, it qualifies as a chelating ligand. Chelating ligands form multiple bonds with a single metal ion, enhancing stability.

**Hint:** Consider whether the ligand can attach to a metal ion at multiple points.

### Conclusion
Based on the analysis:
- Ethane-1,2-diamine is a neutral ligand.
- It is a bidentate ligand due to its two nitrogen donor sites.
- It is also a chelating ligand because it can form multiple bonds with a metal ion.

Thus, the correct statement about ethane-1,2-diamine is that it is a neutral, bidentate, and chelating ligand.

**Final Answer:** All of the above statements are correct.