is it true that Coordination compounds are mainly known for transition metals?

Explanation

**Step-by-Step Solution:**

1. **Understanding Coordination Compounds:**
Coordination compounds are complex structures formed by the coordination of metal ions with ligands. Ligands are molecules or ions that can donate a pair of electrons to the metal.

2. **Role of Transition Metals:**
Transition metals are elements found in the d-block of the periodic table. They are known for their ability to form coordination compounds due to the presence of d-orbitals.

3. **Availability of d-Orbitals:**
Transition metals have d-orbitals that can accommodate electrons. This availability allows them to form various coordination complexes by bonding with ligands.

4. **Variable Valences:**
Transition metals can exhibit multiple oxidation states (variable valences). This property enables them to form different types of coordination compounds depending on the oxidation state of the metal.

5. **Stability of Coordination Compounds:**
Coordination compounds formed by transition metals are often stable, even with high charges. This stability is due to the strong interactions between the metal and the ligands.

6. **Conclusion:**
Therefore, it is true that coordination compounds are mainly known for transition metals due to the availability of d-orbitals, their variable valences, and the stability of the complexes they form.

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