Question

The coordination number of central metal atom in a complex is determined by

• A. the number of ligands around a metal ion bonded by sigma bonds
• B. the number of ligands around a metal ion bonded by $\pi$ bonds
• C. the number of ligands around a metal ion bonded by sigma and $\pi$ bonds both
• D. None of the above

Hint:

Coordination number counts only sigma bonds between metal and ligand donor atoms.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Coordination number is the number of ligand donor atoms directly bonded to the metal.
Step 2: Detailed Explanation:
Coordination number counts only sigma bonds between metal and ligand donor atoms.
Step 3: Final Answer:
Coordination number is the number of ligands bonded by sigma bonds.