Low oxidation state of metals in their complexes are common when ligands:
- (A)have good -accepting character✓ Correct
- (B)have good -donor character
- (C)are havind good -donating ability
- (D)are havind poor -donating ability
Answer: (A)
Solution
Metals in low oxidation states have high electron density in their d-orbitals. To stabilize this electron-rich metal center, ligands with good π-accepting character (π-acceptor ligands) are needed. These ligands can accept electron density from the metal's filled d-orbitals into their empty π* orbitals through back-bonding, thereby stabilizing the low oxidation state.
Examples of π-acceptor ligands include CO, CN⁻, and phosphines. These form stable complexes with metals in zero or low positive oxidation states.
Therefore, low oxidation states are stabilized by ligands with good π-accepting character.
Examples of π-acceptor ligands include CO, CN⁻, and phosphines. These form stable complexes with metals in zero or low positive oxidation states.
Therefore, low oxidation states are stabilized by ligands with good π-accepting character.
JEE Main · 2022 · 27 Jul 2022 · Shift 2 · Single correct option