Discuss the nature of bonding in metal carbonyls.
Discuss the nature of bonding in metal carbonyls.
The metal-carbon bond in metal carbonyls have both sigma (σ) and pi (π) characters. The metal-carbon σ− bond is formed by the donation of lone pair of electrons of the carbonyl carbon to a vacant orbital of the metal. The metal-carbon π−bond is formed by the donation of a pair of electrons from a filled d-orbital of metal into the vacant antibonding π− molecular orbital π∗ of carbon monoxide.
It means a π bond is formed by the donation of a pair of electrons from the filled metal d orbital into the vacant anti-bonding π orbital (also known as back bonding of the carbonyl group). The σ bond strengthens the π bond and vice-versa. Thus, a synergic effect is created due to this metal-ligand bonding. This synergic effect strengthens the bond between CO and the metal.
The metal-carbon bond in metal carbonyls have both sigma (σ) and pi (π) characters. The metal-carbon σ− bond is formed by the donation of lone pair of electrons of the carbonyl carbon to a vacant orbital of the metal. The metal-carbon π−bond is formed by the donation of a pair of electrons from a filled d-orbital of metal into the vacant antibonding π− molecular orbital π∗ of carbon monoxide.
It means a π bond is formed by the donation of a pair of electrons from the filled metal d orbital into the vacant anti-bonding π orbital (also known as back bonding of the carbonyl group). The σ bond strengthens the π bond and vice-versa. Thus, a synergic effect is created due to this metal-ligand bonding. This synergic effect strengthens the bond between CO and the metal.
