Question

Which of the following(s) does not represent the coordination number of central metal atom in complex?

• A. The number of only anionic ligands bonded to the metal ion
• B. The number of ligands around a metal ion bonded by $\pi -$bonds
• C. The number of ligands around a metal ion bonded by both $\sigma \text{and}\pi$bonds
• D. All of the above.

Answer 1

The correct option is D All of the above.

The co-ordination number of a central metal in a complex is not determine through the number of only anionic ligands bonded to the metal ion bonded but also by $\pi$ bonds and the number of ligands around a metal ion bonded by both $\sigma$ and $\pi$ bonds. So, correct options is (d).