What is meant by unidentate, didentate and ambidentate ligands ? Give two examples for each.

Explanation

### Step-by-Step Solution:

1. **Understanding Ligands and Dinticity**:
- Ligands are ions or molecules that can donate a pair of electrons to a metal ion to form a coordination complex. The term "dinticity" refers to the number of sigma bonds formed between the ligand and the metal ion.

2. **Unidentate Ligands**:
- Unidentate ligands are those that can form only one sigma bond with the metal ion. This means they have a single donor atom that coordinates with the metal.
- **Examples**:
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