Question

Is ${\mathrm{PPh}}_{3_{}}$a strong ligand?

Answer 1

Explanation:

1. Ligand: The substance or species which donates its pair of electrons to the central metal ion is called a ligand.
2. The ligands are categorized mainly into two types one is a strong field ligand and the other is a weak field ligand.
3. Which can provide the pairing of electrons during the bond formation is called a strong field ligand. Example: ${\mathrm{CN}}^{-},\mathrm{CO}$
4. A ligand that is unable to pair the electron is called a weak field ligand. Example: ${\mathrm{F}}^{-},{\mathrm{H}}_2\mathrm{O}$
5. ${\mathrm{PPh}}_3$ is a strong field ligand. It is a $\mathrm{\pi }$ acceptor ligand.

Hence, ${\mathrm{PPh}}_3$ is a strong field ligand.