Question

The coordination number of a central metal atom in a complex(s) is/are not determined by

• 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. The number of ligands around a metal ion bonded by $\sigma$ bonds

Answer 1

Answer: (A), (B), (C)

The number of ligands around a metal ion bonded by both $\sigma \text{and}\pi$bonds

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 are (a), (b) and (c).